|28/04/2017 4:00 PM||Internal Seminar|
|21/04/2017 4:00 PM||Single-trial event-related potential extraction through one-unit ICA-with-reference||Dr Wee-Lih Lee|
Abstract: In recent years, ICA has been one of the more popular methods for extracting event-related potential (ERP) at the single-trial level. It is a blind source separation technique that allows the extraction of an ERP without making strong assumptions on the temporal and spatial characteristics of an ERP. However, the problem with traditional ICA is that the extraction is not direct and is time-consuming due to the need for manual source selection. Thus, the application of a one-unit ICA-with-Reference (ICA-R), a constrained ICA method, is proposed. In cases where the time-region of the desired ERP is known a priori, this time information is utilized to generate a reference signal, which is then used for guiding the one-unit ICA-R to extract the source signal of the desired ERP directly. Our results showed that, as compared to traditional ICA, ICA-R is a more effective method for analysing ERP because it avoids manual source selection and requires less computation thus resulting in faster ERP extraction. Since the method is automated, it reduces the risks of any subjective bias in the ERP analysis.
Bio: Dr Wee-Lih Lee received his Bachelor and PhD degrees (Electrical and Computer Engineering) from Curtin University in 2009 and 2014 respectively. Currently, he is a research engineer in Bionics Institute where he is developing software for closed-loop DBS system. His research interests include signal processing, pattern recognition and their application on biomedical signals.
|7/04/2017 4:00 PM||Evaluation of focused multipolar stimulation for cochlear implants: a preclinical safety study||Professor Rob Shepherd|
Abstract: Cochlear Implants (CIs) have a limited number of independent stimulation channels due to the highly conductive nature of the fluid-filled cochlea. Attempts to develop highly focused stimulation to improve speech perception in CI users includes the use of simultaneous stimulation via multiple current sources. Focused multipolar (FMP) stimulation is an example of this approach and has been shown to reduce interaction between stimulating channels. However, compared with conventional biphasic current pulses generated from a single current source, FMP is a complex stimulus that includes extended periods of stimulation before charge recovery is achieved, raising questions on whether chronic stimulation with this strategy is safe. The present study evaluated the long-term safety of intracochlear stimulation using FMP in a preclinical animal model of profound deafness. Animals were bilaterally implanted with scala tympani electrode arrays two months after deafening, and received continuous unilateral FMP stimulation at levels that evoked a behavioural response for periods of up to 182 days. Electrode impedance, electrically-evoked compound action potentials (ECAPs) and auditory brainstem responses (EABRs) were monitored periodically over the course of the stimulation program from both the stimulated and contralateral control cochleae. On completion of the stimulation program cochleae were examined histologically and the electrode arrays were evaluated for evidence of platinum (Pt) corrosion. There was no significant difference in electrode impedance between control and chronically stimulated electrodes following long-term FMP stimulation. Moreover, there was no significant difference between ECAP and EABR thresholds evoked from control or stimulated cochleae at either the onset of stimulation or at completion of the stimulation program. Chronic FMP stimulation had no effect on spiral ganglion neuron (SGN) survival when compared with unstimulated control cochleae. Long-term implantation typically evoked a mild foreign body reaction proximal to the electrode array; however stimulated cochleae exhibited a small but statistically significant increase in the tissue response. Finally, there was no evidence of Pt corrosion following long-term FMP stimulation; stimulated electrodes exhibited the same surface features as the unstimulated control electrodes. In summary, chronic intracochlear FMP stimulation at levels used in the present study did not adversely affect electrically-evoked neural thresholds or SGN survival but evoked a small, benign increase in inflammatory response compared to control ears. Moreover chronic FMP stimulation does not affect the surface of Pt electrodes at suprathreshold stimulus levels. These findings support the safe clinical application of an FMP stimulation strategy.
Bio: Professor Rob Shepherd is the Director of The Bionics Institute and Head of the Medical Bionics Department at the University of Melbourne. In the 1980’s he led the preclinical team that demonstrated the safety and efficacy of Cochlear's bionic ear in both adults and children, and more recently his team developed a prototype bionic eye as part of an Australia-wide collaboration – Bionic Vision Australia – to develop a commercial bionic eye. He has published over 200 peer-reviewed papers, given more than 100 invited international keynote conference presentations, received $95M of research funding as a chief investigator. Prof Shepherd has overseen the expansion of the Bionic Ear Institute into the Bionics Institute, broadening its research portfolio to include retinal prostheses, neurobionics - a platform technology for diseases such as epilepsy, Parkinson’s disease and the stimulation of visceral nerves, and introducing a contract research organisation specialising in in vitro and in vivo R&D associated with neural prostheses and drug delivery technologies. In 2014 he was awarded the Garnett Passe Medal at the Royal Society of Medicine, London for his contributions to Otolaryngology and in 2015 he was elected a Fellow of the Australian Academy of Health and Medical Sciences and a member of “Knowledge Nation 100” of Australia’s top innovators.
|31/03/2017 4:00 PM||Gene therapy for cochlear sensory cell protection and regeneration||Dr Rachael Richardson|
Abstract: Hearing loss is often ignored until there is significant loss of cochlear hair cells and spiral ganglion neurons (SGNs). Our research indicates that neurotrophic factor gene therapy is effective for long-term preservation of SGNs. Gene therapy could be considered for conditions were a cochlear implant will still be required but little is known about the interaction between gene therapy and cochlear implantation and associated electrical stimulation. The research will address two main aims: (i) To determine if electrical stimulation from a cochlear implant enhances neural survival and regeneration from AAV-BDNF gene therapy, and (ii) To determine if electrical stimulation from a cochlear implant changes the gene expression profile from AAV-BDNF gene therapy
Methods: Guinea pigs were deafened by ototoxic agents (n=16). Gene therapy was by injection of adenoviral vectors expressing a reporter gene together with the neurotrophic factor BDNF. An electrode array was then implanted and guinea pigs received electrical stimulation for 4 weeks. Control animals did not receive stimulation.
Results: Ototoxic exposure resulted in a significant loss of SGNs (p<0.05). Guinea pigs that had combined electrical stimulation and BDNF gene therapy did not have a significant change in EABR threshold and had greater density of SGNs compared to control, while animals that did not receive stimulation had a significant increase (i.e. deterioration) in EABR threshold and had a significant loss of SGNs (p<0.05). There is also a trend towards a greater level of gene expression in animals that received electrical stimulation.
In conclusion, the results suggest positive effects of combining gene therapy and electrical stimulation.
Bio: Dr Rachael Richardson is current a Senior Research Fellow at the Bionics Institute. Rachael’s research focus is on gene therapy in the cochlea for the preservation and regeneration of cochlear sensory cells after hearing loss since. She uses viral gene therapy techniques to create localized regions of gene expression in the cochlea for sensory cell survival or regeneration. Recently Rachael and her team have also been investigating optogenetics to determine whether auditory neurons can be stimulated more precisely with light compared to electrical stimulation. Rachael completed a BSc degree at the University of Melbourne in Biochemistry and Pathology. Her BSc(Hons) and PhD were undertaken at the Walter and Eliza Hall Institute of Medical Research, Department of Cancer and Haematology, supervised by Prof Doug Hilton. Rachael has worked at the Bionics Institute since 2001.
|24/03/2017 4:00 PM||Minimally-Invasive Electrodes for Long-Term Sub-scalp EEG||Dr Yuri Benovitski|
Bio: Dr. Yuri Benovitski’s 2014 PhD thesis is titled “Behavioural and Cortical Responses to Electric and Acoustic Stimulation in Partial Hearing Cochlear Implant Model” undertaken at the Bionics Institute (sponsored by La-Trobe University) supervised by James Fallon, Graeme Rathbone and Peter Blamey. He also holds a bachelor of Electronic Engineering (Hons) from RMIT University. After completing an internship at Monash Biomedical Imaging (sponsored by VLSCI) in 2014 he returned to the Bionics Institute. He is currently developing a minimally-invasive long-term EEG monitoring implant. This is part of a multidisciplinary team effort in collaboration with St. Vincents Hospital, Melbourne University, and Cochlear Ltd.
Abstract: Objective: Minimally-invasive approaches are needed for long-term reliable Electroencephalography (EEG) recordings to assist with diagnosis, investigation and more naturalistic monitoring of neurological disorders such as epilepsy. A study comparing three methods for long-term implantation of sub-scalp EEG electrodes would be discussed.
Methods: Three types of electrodes (disk, ring, and peg) were designed and fabricated at the Bionics Institute from biocompatible materials and implanted under the scalp in five ambulatory ewes for 3+ months. Disk electrodes were inserted into sub-pericranial pockets. Ring electrodes were tunneled under the scalp. Peg electrodes were inserted into the skull, close to the dura. EEG was continuously monitored wirelessly. High resolution CT imaging, histopathology, and impedance measurements were used to assess the status of the electrodes at the end of the study.
Results: EEG amplitude was larger in the peg compared with the disk and ring electrodes. Similarly, chewing artifacts were lower in the peg electrodes. Electrode impedance increased after long-term implantation particularly for those within the bone. Micro-CT scans indicated that all electrodes stayed within the sub-scalp layers. All pegs remained within the burr holes as implanted with no evidence of extrusion. Eight of 10 disks partially eroded into the bone by 1.0 mm from the surface of the skull. The ring arrays remained within the sub-scalp layers close to implantation site. Histology revealed that the electrodes were encapsulated in a thin fibrous tissue adjacent to the pericranium. Overlying this was a loose connective layer and scalp. Erosion into the bone occurred under the rim of the sub-pericranial disk electrodes.
Conclusions: The results indicate that the peg electrodes provided high quality EEG, mechanical stability, and lower chewing artifact. Whereas, ring electrode arrays tunneled under the scalp enable minimal surgical techniques to be used for implantation and removal.
|17/03/2017 4:00 PM||Improving Epilepsy Management from Big Data||Dr. Dean Freestone|
Abstract: In this talk Dr Freestone will discuss findings from analysing the NeuroVista dataset. The NeuroVista dataset is largest continuous set of neural recordings from patients with epilepsy. The insights from this data highlight the patient-specific aspects of epilepsy, including seizure rhythms across multiple scales, a new understanding of seizure types. This talk will outline how this information can be used to improve epilepsy management and our road map to clinically viable seizure forecasting.
Bio: Dr Freestone’s research is based on using engineering methods to better manage neurological disorders. He is working closely with Medtronic and IBM Australia to develop new technology to repair broken neural circuits. Dr Freestone has an honours degree in Electronic Engineering from La Trobe University, where he was supervised by Graeme Rathbone. In 2012, he completed his PhD in Engineering under the supervision of Prof David Grayden. Dr Freestone was the 2014-2015 Victorian Fulbright Postdoctoral Fellow at Columbia University before returning to Melbourne in October 2015. He is now a junior faculty member in the Department of Medicine at St. Vincent’s Hospital Melbourne, with Prof Mark Cook. He is a cofounder of Seer Medical, a new company that is focused on using data from implantable and wearable devices to improve healthcare.
|10/03/2017 4:00 PM||Changes in the conceptualization of auditory cortical receptive fields: Diamond and Weinberger 30 years later||Prof. Dexter Irvine|
Abstract: In 1986, Diamond and Weinberger reported changes in the frequency response areas of neurons in non-primary areas of auditory cortex as a consequence of behavioural conditioning procedures. Shortly after, changes in neuronal frequency selectivity in primary auditory cortex (AI) were described as a consequence of both restricted cochlear lesions and of conditioning. This evidence for plasticity of auditory cortical spectral receptive fields triggered major changes in the way in which these fields are conceptualized. Rather than being a relatively simple reflection of input from a labelled line originating from a frequency selective point on the basilar membrane, the spectral receptive field of an auditory cortical neuron at any point in time is sculpted from an extraordinarily wide range of inputs from a wide range of sources. The sculpting process itself can be driven by a wide range of experiential variables. The early experiments, and the range of subsequent studies that have shaped our current understanding of spectral RFs, will be reviewed.
Bio: Professor Dexter Irvine completed a BA (Hons) degree in Psychology at the University of Sydney in 1966 and a PhD in auditory neuroscience at Monash University in 1971. After post-doctoral training at the University of Western Australia and the University of California at Irvine, he joined the Department of Psychology at Monash University. He has spent periods as a visiting research fellow at the University of Heidelberg, the University of Wisconsin (Madison), and the University of Washington (Seattle). He held a Personal Chair at Monash from 1994 until his retirement in 2005, and is now an Emeritus Professor in the Sub-Faculty of Psychological and Biomedical Sciences and a Fellow of the Academy of Social Sciences in Australia. He currently has a part-time position as a Professorial Research Fellow at the Bionics Institute. Throughout his career, Professor Irvine’s research has been directed to a number of aspects of central auditory processing, notably mechanisms of sound localization and the functional organization of the auditory cortex. Over the last twenty-five years, his work has focused on plasticity in the adult auditory system. He has published a monograph on auditory brainstem processing, a co-edited book on auditory spectral processing, and approximately 125 peer-reviewed publications and book chapters on various aspects of the neural mechanisms of hearing.
|3/03/2017 4:00 PM||How to Diagnose Ataxia||Dr David Szmulewicz|
One of the most common and medically concerning manifestations of ataxia (or incoordination) is gait imbalance. Imbalance represents one of the most prevalent medical complaints globally and in the developed world is as common a presentation as back pain or headache. With an overall incidence of 5-10%, imbalance effects 40% of people older than 40 years and the incidence of falls is 25% in those aged 65 and over. Diagnosis of dizziness or balance disorders is very often challenging, with no single cause accounting for more than 5–10% of cases. Historically, the study of the vestibular, cerebellar and proprioceptive systems has proceeded separately, leading to the impression that some researchers and clinicians regard these systems as physiologically independent. There has also been a lack of ‘tools’ for readily describing and measuring dysfunction in these systems. This current program of work aims to instrument key aspects of the clinical examination that are utilized in the assessment of the imbalanced patient.
David Szmulewicz is a Neurologist, Neuro-otologist and medical researcher. He holds a PhD from the University of Melbourne. His clinical and research interests include balance disorders that affect the vestibular system, cerebellum and the combination of the two. He is the head of the Balance Disorders & Ataxia Service at the Royal Victorian Eye & Ear Hospital, founder of the AlfredHeallth Cerebellar Ataxia Clinic, honorary consultant Neurologist at St Vincent’s Hospital and Lecturer at Melbourne and La Trobe Universities. David is lead investigator on research defining a novel ataxia – Cerebellar Ataxia with Neuropathy and Vestibular Areflexia Syndrome (CANVAS), a project looking at improved methods of imbalance diagnosis, as well as the development of an interactive vertigo assessment tool (iVAT) and an objective bedside test of imbalance - the video VVOR. He is co-director of The Australian Temporal Bone Bank which aims to facilitate pathological investigation of hearing and balance diseases.
|24/02/2017 4:00 PM||A journey of our progress to restore hearing in the deaf cochlea using stem cells||Dr Bryony Nayagam - Bionics Institute, St Vincent’s Hospital, Melbourne. Department of Audiology and Speech Pathology, The University of Melbourne.|
Abstract: Dr Nayagam’s research is focussed on investigating whether stem cells can provide functional replacement neurons to the deaf cochlea. Replacing these dying neurons could lead to enhanced benefits with a cochlear implant for severely-to-profoundly deaf individuals, and may help to restore hearing in patients with auditory neuropathy. Her studies are aimed at addressing several major challenges including differentiation of stem cells into functional auditory neurons, examining if these stem cell-derived neurons can make synapses on appropriate tissues, and whether neural function can be improved when stem cells are combined with electrical stimulation from a cochlear implant.
Recent studies in the Nayagam lab have demonstrated that stem cells can be induced to differentiate into sensory neurons in vitro, using an number of human pluripotent stem cell lines. All stem cell types produce cells which express auditory neural proteins and are physiologically functional. Furthermore, human pluripotent stem cell-derived neurons make synaptic contacts on peripheral (hair cells) and central (cochear nucleus) tissues when co-cultured for two weeks in vitro. We are currently investigating the effects of chronic electrical stimulation, delivered via a fully implantable cochlear implant, on the central and functional integration of stem cells transplanted into the deafened mammalian cochlea. Our data has shown that human and mammalian stem cell transplants are well tolerated in the deaf mammalian cochlea and survive and differentiate for periods of at least 8 weeks.
The described studies use a well characterised system for proof-of-concept experiments to test the functional integration of human stem cell-derived neurons. This addresses a critical step in the development of a stem cell therapy for neural replacement, by determining whether neurons derived from stem cells can make functional connections with tissues of the peripheral and central nervous system. Whilst currently in the basic research phase, our experimentation is designed to be directly applicable in the clinic, with an emphasis on providing patient-matched stem cells and delivering these using clinically relevant surgical procedures. This talk will give an overview of progress made over the last decade and include current and future investigations of this nature.
Bio: Dr Bryony Nayagam undertook her PhD with Professor Rob Shepherd at the Bionic Ear Institute in Melbourne (2003-2006), where she examined the potential of stem cells to provide replacement neurons to the deaf mammalian cochlea. She went on to complete post-doctoral studies at the Eaton Peabody Laboratories, Harvard, with Professor Albert Edge and then at Johns Hopkins University, Baltimore, with Professor David Ryugo as part of a Victoria Fellowship awarded in 2007. Dr Nayagam returned to the Department of Otolaryngology at the University of Melbourne in 2008 to establish a research group in stem cells and regeneration as a full-time Research Fellow. She is currently a Senior Lecturer in the Department of Audiology and Speech Pathology, University of Melbourne, where she coordinates the Anatomy and Physiology subjects for the Masters of Audiology and the Masters of Speech Pathology courses. She is an Honorary Research Fellow at the Bionics Institute (where her biological research group is based) and a current Garnett Passe and Rodeney Williams Memorial Foundation Research Fellow (2015-2019). Her major research interests lie in stem cell and regenerative therapies for hearing restoration, with an emphasis on whether transplanted stem cells can restore a functional neural circuit (NHMRC GNT#1023372; 2012-2017)
|17/02/2017 4:00 PM||Nonlinear retinal ganglion cell responses are mediated by activation of retinal interneurons during electrical stimulation||Dr Matias Maturana, National Vision Research Institute|
Abstract: Retinal implants electrically stimulate surviving retinal ganglion cells (RGCs) to restore sight in people who have lost their photoreceptors through degenerative diseases. Complex spatial and temporal interactions occur in the retina during multi-electrode stimulation. Due to these complexities, most neural implants activate only a few electrodes at a time, limiting the repertoire of available stimulation patterns. By measuring the spatiotemporal interactions and incorporating them into a model, algorithms that exploit the interactions between electrodes can be designed. Here, we present a computational model that accurately predicts both the spatial and temporal nonlinear interactions of multi electrode stimulation of rat RGCs. Our model was verified using in vitro recordings of ON, OFF, and ON OFF RGCs in response to subretinal multi electrode stimulation at three stimulation frequencies (10, 20, 30 Hz). The model gives an estimate each cell’s spatiotemporal electrical receptive fields (ERFs); i.e. the pattern of stimulation leading to excitation or suppression in the neuron. All cells had excitatory ERFs. In addition, many had suppressive ERFs, which opens the possibility for cell responses to also be actively suppressed using electrical stimulation. We show that the complexities in observed responses arise largely from activation of retinal interneurons. When synaptic transmissions were blocked, RGC responses could be accurately described by a simpler linear model.
Bio: Matias completed a Bachelor of Arts/Science at the University of Melbourne in 2006 and subsequently went on to complete a Masters of Engineering (Electrical) in 2012. During his Masters, Matias worked part-time at Bionic Vision Australia doing computational modelling of the intrinsic properties of retinal ganglion cells. His interest in visual neuroscience led him to begin his PhD in 2013, where he investigated novel stimulation strategies for the bionic eye implant. Matias completed a PhD in Engineering (Electrical) in 2016. Currently, Matias works as a postdoctoral fellow at the National Vision Research Institute. His work involves electrically stimulating retinal ganglion cells with multielectrode arrays and developing mathematical models that relate the responses to the electrical stimuli.
|10/02/2017 4:00 PM||Vision assessment and rehabilitation in the age of substitute, restorative, and prosthetic vision||A/Prof Gislin Dagnelie, Associate Professor of Ophthalmology in the Johns Hopkins University School of Medicine|
Abstract: The past decade has seen a rapid expansion of potential treatment options for blinding diseases, particularly those of the outer retina. The examples or gene therapy for LCA, the Brainport sensory substitution, and more than a half dozen retinal implants that have been tested or are in clinical use have taught us that it is difficult to measure treatment benefit, and that the development of assessment and rehabilitation methods is an arduous task.
In this talk we will approach these tasks from the opposite end of the spectrum, that of individuals with minimal remaining natural vision, and use their visual experience to develop new assessment and rehab methods.
Bio: Gislin Dagnelie, Ph.D., is an Associate Professor of Ophthalmology in the Johns Hopkins University School of Medicine and the associate director of the Lions Vision Research and Rehabilitation Center, a division of the Wilmer Eye Institute. His work over the last 25 years has been supported by grants from the National Institutes of Health and multiple other public and private sponsors. Dr. Dagnelie has been the Center Principal Investigator for clinical trials of the Second Sight Argus™ 2 retinal implant (2007-present) and is now leading several follow-up studies of Argus II use in patients’ daily lives. In addition, he studies signals in the retina of retinal prosthesis patients, is involved in the development of psychophysical strategies for the Chicago intracortical prosthesis project, and is developing rehabilitation and assessment methods for visual prosthesis wearers and other individuals with ultra-low vision.
|3/02/2017 4:00 PM||Bionic Eyes - Improving patient outcomes through eye tracking||Sam Titchener, pHD Student, Bionics Institute |
Abstract: Most retinal implant designs incorporate a head-mounted camera that captures the visual input to the system. Users of these devices cannot use eye movements to explore their visual environment because the orientation of the head-mounted camera, which is fixed in place relative to the head, is inherently decoupled from the orientation of their eyes. Instead, they rely on head and neck movements to direct the field of view of the camera. Our initial studies investigate how eye movements affect perception in prosthetic vision. Ultimately we aim to use eye tracking technology to enable patients to naturalistically explore their visual environment by controlling the field of view with eye movements.
|16/12/2016 4:00 PM||Current steering and current focusing techniques for a retinal prosthesis ||Dr Mohit Shivdasani, Senior Research Fellow, Bionics Institute|
Abstract: Over the last decade, retinal prostheses have emerged as the only regulatory-approved technology to provide vision to profoundly blind patients. Contemporary devices provide sufficient vision for object detection, discrimination and motion detection. However, patients generally perform poorly for tasks requiring higher spatial resolution such as object recognition and reading. Factors responsible for this include the spatial distortion of phosphenes, phosphene overlap and perceptual interactions between electrodes, mostly attributed to current spread in the retina. In an effort to improve resolution, our group has been evaluating the efficacy of several current steering and current focusing techniques in preclinical studies. An overview of these techniques, our experimental results and implications for future work including their clinical application will be presented.
Bio: Dr Mohit Shivdasani arrived in Australia from India to pursue a Master’s degree in Biomedical Engineering at La Trobe University. He subsequently completed a PhD in Auditory Neuroscience following which he took up a postdoctoral position at the Bionics Institute in 2009. Since then, he has been part of a multi-disciplinary team that developed a prototype implant through a federally funded grant awarded to Bionic Vision Australia. Based on his preclinical and clinical experience with this prototype, his future goals are to continue basic research to help improve the resolution of the implant in order to improve functional outcomes.
|8/12/2016 12:00 PM||Brain Drug Fluid Delivery ||Dr Daniel J. Abrams, CEO, Cerebral Therapeutics |
Abstract: Brain drug delivery has promise for a number of important neurologic disorders. A short history of spinal drug utilization, implantable systems and brain drug utilization will be presented.
Bio: Dr. Abrams is a cofounder of Cerebral Therapeutics and serves as its startup CEO. Prior to founding Cerebral Therapeutics, Dr. Abrams founded Sierra Neuropharmaceuticals, Inc., raising $21.5 million in Series A venture capital and put together a world class team of advisers, physician leaders and executives to form its board of directors. Dr. Abrams was active with Sierra Neuropharmaceuticals, Inc. until July of 2009. Dr. Abrams practiced as a neurosurgeon and served as head of the Department of Neurosurgery at St. Joseph’s Hospital in Denver. Dr. Abrams’ practical experience with implantable pumps and medications in neurology and psychiatry, and his experience with interdisciplinary medical teams and research groups, make him uniquely qualified to lead Cerebral Therapeutics in its focus of clinically testing brain drug delivery.
|2/12/2016 12:00 PM||Epigenetic regulation of hair cell regeneration in the cochlea ||Dr Niliksha Gunewardene, Research Fellow, Harvard Medical School |
Abstract: One of the primary causes of deafness is the loss of hair cells in the inner ear. Unlike hair cells in lower vertebrates, adult mammals are unable to spontaneously regenerate their hair cells, hence making deafness due to hair cell loss permanent and intractable. Whilst some hair cell regeneration is detected in early postnatal mice, the reason for the lack of regenerative capacity in the adult cochlea remains unknown. One hypothesis is that chemical modifications (epigenetic marks) have silenced genes responsible for hair cell regeneration. This talk will focus on elucidating the epigenetic mechanisms underlying hair cell differentiation and how these modifications can be manipulated to regenerate hair cells and restore hearing in the deaf mammalian cochlea.
Bio: Dr Gunewardene graduated from the University of Auckland in 2010, with a degree in Biomedical Science and a Masters in Auditory Neuroscience. Her Masters project was focused on developing a treatment for Cisplatin-induced ototoxicity and was supervised by Professors Peter Thorne and Srdjan Vlajkovic. In 2011, Niliksha begun her PhD under the supervision of Dr Bryony Nayagam at the Department of Otolaryngology, University of Melbourne. She examined the potential of induced pluripotent stem cells for auditory neuron replacement in the deaf cochlea. Her thesis was nominated for the Dean’s Prize for Excellence (2014). Niliksha is currently a Postdoctoral Research Fellow in Professor Albert Edge’s Lab at the Harvard Medical School.
|25/11/2016 4:00 PM||Objective measures of temporal processing and speech understanding in normally-hearing young adults ||Dr Hamish Innes-Brown, Research Fellow, Bionics Institute |
Abstract: People with impaired hearing often have difficulties understanding speech sounds in noisy environments. This problem is partially a result of the auditory systems reduced capacity to process temporal information. In this presentation I will report our previous research examining the relationships between perceptual sensitivity to temporal fine structure (TFS) cues, brainstem encoding of complex harmonic and amplitude modulated sounds, and the ability to understand speech in noise. A second study also includes psychophysical and ASSR-based measures of modulation detection sensitivity and inter-aural phase detection sensitivity, as well as speech understanding in co-located and spatially-separated noise conditions. Rather than a single group with a variety of hearing thresholds and ages, the new study is restricted to young people (20-30 years) with normal hearing.
Bio: Hamish is a research fellow at the Bionics Institute in Melbourne. He is interested in how the mind perceives the outside world – especially when parts of the sensory system are damaged. Currently he is working to improve the way that vital but subtle sounds are transmitted via a bionic ear to the brain. To do this he measures brain activity using electrical and optical probes while people listen to challenging sounds. He has also had a long interest in how people with hearing difficulties experience music, and how music itself might change in response to altered hearing.
|18/11/2016 4:00 PM||Understanding the mechanisms underlying postural instability in Parkinson’s disease ||Joy Tan, PhD Student/Research assistant, Bionics Institute|
Abstract: Balance difficulties commonly emerge in advanced stages of Parkinson’s disease. This debilitating condition results in reduced mobility, increased falls, and diminished quality of life. The effectiveness of medication and deep brain stimulation to alleviate postural deficits remain variable. Clinical measures of postural instability are insensitive and subjective, and do not differentiate the underlying causes of postural instability. As such, we developed a novel instrumented system to precisely measure balance using 3D motion tracking by measuring truncal responses. We found the system was able to detect sensitive changes in truncal responses using the “StartReact” paradigm in young healthy participants. In combination with posturography, we investigate the differing mechanisms underlying postural instability in patients with Parkinson’s disease on current therapies of medication and deep brain stimulation.
Bio: Joy Tan is a physiotherapist and PhD student at the Bionics Institute/The University of Melbourne. Her research investigates the effects of deep brain stimulation on postural instability in Parkinson’ disease. Joy completed her Bachelor of Physiotherapy (Hons) from the University of Melbourne and works concurrently at the Royal Melbourne Hospital specialising in movement disorders and Parkinson’s disease. She has a particular interest in gait and balance impairments for clinical practice and research.
|18/11/2016 4:00 PM||Restricting neural activation using focused multipolar stimulation in a model of retinal degeneration||Tom Spencer, PhD Student, Bionics Institute |
Abstract: Retinal prostheses work by electrically stimulating residual retinal neurons, providing artificial input to the visual system in patients with severe photoreceptor loss. The resolution provided by retinal implants is still severely limiting for recipients. A major limiting factor is presumed to be uncontrolled spread of activation within the retina in response to monopolar (MP) electrical stimulation. Previously we have shown focused multipolar (FMP) stimulation can be used to restrict activation spread in the visual cortex. This study investigates the use of this technique in a model of retinal degeneration, to verify the efficacy of FMP following the morphological and functional changes associated with photoreceptor loss.
|11/11/2016 4:00 PM||Developing Stimuli-responsive Electroactive Materials for Biomedical Research||Prof Simon Moulton, Professor of Biomedical Electromaterials Science, Swinburne University of Technology|
Abstract: Recent advances in the ability to manipulate and characterise materials have brought us closer to creating more effective bionic interfaces. The nature of that interface is dependent upon the chemical, physical, morphological and mechanical properties of the implant. Research being undertaken at Swinburne University and within the ARC Centre of Excellence for Electromaterials Science continues to develop a class of material, termed electromaterials that permits the on demand manipulation of the materials-biological interface. This presentation will showcase several research projects where stimuli-responsive electromaterials have been used to manipulate the cellular environment (nerve, muscle and stem cell) as well as provide a means to control the delivery of therapeutic agents (neurotrophins and anti-epilepsy drugs).
Bio: Prof Moulton obtained his PhD in 2002 from University of Wollongong under the supervision of Prof Gordon Wallace. After graduation he continued to work within the ARC Centre of Excellence for Electromaterials Science (ACES) until 2014 when he moved to Swinburne University to take up the position of Professor of Biomedical Electromaterials Science. His field of research is developing stimuli responsive electroactive materials for use in a variety of biomedical applications ranging cellular stimulation to controlled drug delivery.
|10/11/2016 12:00 PM||Restoring Walking after Incomplete Spinal Cord Injury using Intraspinal Microstimulation||Ashley Dalrymple, PhD Candidate, Neuroscience and Mental Health Institute, University of Alberta |
Abstract: A spinal cord injury (SCI) results in paralysis of muscles below the lesion. The degree of paralysis depends on the level and extent of damage to the spinal cord, with incomplete being the most frequent type of SCI. The goal of my work is to improve mobility after incomplete SCI using intraspinal microstimulation (ISMS).
ISMS entails implanting electrodes into the ventral horns of the lumbosacral enlargement of the spinal cord to achieve coordinated movements of the legs. In a complete SCI model, ISMS produced long distances of walking (~ 1km), suggesting that it may be a viable clinical method. The focus of this ongoing work is to develop adaptable control strategies that augment variable residual function after an incomplete SCI.
The control strategies are tested using a computational model of a cat and two SCI models that affect both legs variably. Residual function is measured with sensors for muscle activity, limb position, and loading. Using this information as feedback, and delivering stimulation to the spinal cord as needed, the controller augments remaining function to produce propulsive walking. The controller adapts to variable deficits using machine learning, adapting the stimulation as needed in real-time, creating a personalized neural prosthesis.
Bio: Ashley Dalrymple is a PhD student in Neuroscience at the University of Alberta. She holds an undergraduate degree in Electrical and Biomedical Engineering from the University of Alberta. Her research interests include functional electrical stimulation, neural interfaces, rehabilitation, and machine learning. She is particularly interested in interdisciplinary approaches to restore function and improve the lives of those affected by neural injuries and disorders.
|4/11/2016 4:00 PM||Innervation of mammalian auditory tissues by stem cell-derived neurons||Tomoko Hyakumura, PhD student and research assistant, Bionics Institute |
Abstract: The loss of auditory neurons that occurs with profound hearing loss is irreversible in humans. Stem cell therapy for auditory neuron replacement thereby offers potential for hearing restoration in patients with profound deafness. This project aims to investigate and quantify the formation of new synapses between human embryonic stem cell-derived neurons and target peripheral and central auditory tissues in vitro.
Sensory neurons were generated from human embryonic stem cells over 21 days in vitro and then co-cultured with developing sensory hair cells or cochlear nucleus slices for a further 2 weeks. Synapse formation was examined using four-channel immunofluorescence and confocal microscopy, and analysed using ImageJ software. Stem cell-derived synapses were then compared to synapses in the developing mammalian peripheral and central auditory system.
Stem cell-derived neurons expressed synapsin 1 and vesicular glutamate transporter-1 at sites of innervation with both hair cells and cochlear nucleus neurons. This observation is consistent with results obtained from control cocultures using early postnatal auditory neurons and auditory tissues. Significantly more synaptic contacts were observed in stem cell cocultures in comparison to control cocultures (P <0.05). Moreover, new synapses from stem cell-derived neurons corresponded anatomically with early synaptogenesis in the developing mammalian auditory system in vivo. This assay describes the characterisation, timing and quantification of new synaptic connections both by stem cell-derived neurons in vitro and in the developing mammalian auditory system.
Bio: Tomoko graduated from Monash University with an Honours Degree in Biochemistry. Her Honours project investigated the differentiation of human embryonic stem cells towards a visceral endoderm-like lineage. After graduating, she was recruited to work as a research assistant in Professor Seong-Seng Tan’s laboratory at the Howard Florey Institute, investigating mouse cortical development using transgenic and conditional knockout mice. In 2012, Tomoko was awarded an Australian postgraduate award and Australian Stem Cell Centre postgraduate Scholarship to complete her PhD under the supervision of Dr Bryony Nayagam. Her achievements have won her several awards including the 2014 “Under the Coverslip” competition and a scholarship from the International Society for Developmental Neuroscience.
|28/10/2016 4:00 PM||Evaluating Miniature Deep Brain Stimulation Electrodes In Vivo||Dr Joel Villalobos|
Abstract: Deep Brain Stimulation is used for the treatment of motor symptoms of Parkinson’s disease. However, its efficacy is limited by factors including poor selectivity of stimulation, targeting error, and complications related to implant reliability and stability. We aim to improve clinical outcomes by miniaturizing the implantable electrode array, improving stimulation selectivity with finer electrode spacing, and assisting targeting by incorporating microelectrodes into the device. We used micro-wire electrodes incorporated into Deep Brain Stimulation implants with different diameters (miniature = 0.65 and standard = 1.3 mm). Arrays were bilaterally implanted into the thalamus in ten anaesthetised cats for 24-40 hours using stereotactic techniques. Recordings of local field potentials and multi-unit activity were obtained at 1 mm intervals along the electrode insertion track.
Local field potentials were recorded from all ring electrodes, despite the higher impedance of the miniature ring electrodes (608±158 Ω at 1 kHz vs. 427±47 Ω for the standard rings). Multi-unit activity (signal-to-noise ratio of 15–30 dB) was recorded from 54% of the microelectrodes; mostly from the microelectrodes placed at the distal end. Histological examination showed localized trauma along the implant. The extent of oedema and haemorrhage was significantly reduced with the miniature electrodes (119–352 µm vs. 311–571 µm; t-test, P < 0.001).
The miniature electrodes reduced the extent of acute trauma, while still providing adequate performance for both stimulating and recording, and providing the option to target smaller volumes of tissue. The incorporation of microelectrodes into the electrode array may allow for a simplified, single-step surgical approach.
Bio: Joel Villalobos is a Research Fellow at the Bionics Institute (Melbourne, Australia). He completed a PhD at The University of Melbourne on the preclinical evaluation of a retinal prosthesis (Bionic Eye), enabling the translation into a first-in-human (clinical) trial. His background studies in Electronic Systems Engineering (Cum Laude, Tec de Monterrey) led him initially into the instrumentation (electronic) and automation industry in his native México. There he worked as a senior design engineer with clients (international) in the building automation (smart buildings) and automotive (cars) industries. These days, Joel’s efforts at the Bionics Institute concentrate on improving technologies for treating degenerative blindness (retinitis pigmentosa) and Parkinson’s disease.
|21/10/2016 4:00 PM||Commercialising innovations through industry collaboration: learnings from ‘SoundRecover’||Prof Hugh McDermott, Leader, Neurobionics Research, Bionics Institute|
Abstract: SoundRecover is an innovative sound-processing technique that improves the performance of acoustic hearing aids. It was developed in Melbourne by a small team of researchers working in close collaboration with Phonak, the world's largest manufacturer of hearing instruments. SoundRecover was devised, developed, and initially evaluated during 2002-2005. It was launched commercially by Phonak in 2007. Its immediate success led rapidly to its introduction in almost all of Phonak's hearing-aid products, of which over 1 million are sold globally each year.
SoundRecover helps many hearing-aid users to hear high-frequency sounds by shifting them to lower frequencies. Although frequency lowering is not a new concept, the digital signal processing techniques employed in SoundRecover are innovative and protected in a number of patents. In the years since SoundRecover was launched, the hearing-aid industry has experienced a minor paradigm shift: whereas frequency lowering was widely considered to be worthless when we started our research, now almost all major hearing-aid companies around the world have some type of frequency lowering in their product portfolio.
In this seminar I will discuss the benefits of working directly with a major technology company as well as some of the challenges we encountered and (mostly) overcame. Our experiences are highly relevant to many of the Bionics Institute's projects, particularly as we align our research objectives more closely with commercial considerations.
Bio: I have worked in the field of cochlear implants and related devices for 35 years. As my background is in electronic engineering, my contributions to the field are mostly related to techniques for electrical nerve stimulation and signal processing. Translation of research into practical outcomes that benefit people has always been a major aim of my work. I am named as an inventor on 25 patents or patent applications, and 5 innovative technologies to which I contributed are embodied in successful commercial products. I am an author or co-author of over 140 publications and have been invited to speak at international conferences on over 60 occasions. I am a Fellow of IEEE, a Fellow of the Acoustical Society of America, and a Fellow of the Australian Academy of Health and Medical Sciences. I received the inaugural Callier Prize from the University of Texas, Dallas in 2009. I joined the Bionics Institute as Deputy Director (Research) in 2010, and at present my main role is to lead a research program focused on developing deep brain stimulation devices to improve treatment of Parkinson's disease and other disorders.
|7/10/2016 4:00 PM||What does it take to get a new medical device to market: Regulatory approvals maze||Graeme Rathbone, Project Manager, Bionics Institute|
Abstract: Maze: 1) a confusing network of intercommunicating paths or passages; labyrinth. 2) any complex system or arrangement that causes bewilderment, confusion, or perplexity. In this presentation, I will draw on my current experience with the development of two new devices and past experiences with the TGA, Bionics Institute and lecture presentations to outline the process of medical device regulatory approvals for Australia, New Zealand, North America and some aspects of Europe. This topic is of increasing importance to the emerging commercial interests of the Bionics Institute.
Bio: Graeme has worked in the private, public and academic sectors. He has the majority of his working life lecturing in Biomedical Engineering and Control Systems, initially at RMIT, then La Trobe University and the University of Melbourne. He has undertaken research at the Bionics Institute over the last 10 years including supervision of Masters and PhD students. However, he has also been active in the Yarra Valley wine business, being a co-founder of Yering Station (1996) and owner of Diamond Valley Vineyards (since 2005) and will draw on some of that experience in this second presentation.
|23/09/2016 4:00 PM||Learning curve – an engineer’s amble towards the foothills of molecular biology ||Prof Peter Seligman|
Abstract: As an electrical engineer who came up through the tech school system, we did no biology and certainly no molecular biology (which hardly existed then). But recent events in molecular biology have struck me as being truly momentous in their implications. I needed to know more. So starting from nothing, recently I have been self-educating myself on this. It’s really fascinating and has a lot of similarity to engineering in many ways.
I’d like to take you on my journey. I’ve learned (very superficially)
• What DNA is
• How it is distributed in the body, and any life for that matter.
• How it is extracted from a sample of tissue
• How it can be amplified from a single strand to billions
• How to sequence it
• How it can be edited quickly and efficiently
• What a gene is
• What the role of genes is
• How they replicate
• How genes operate in living things, to grow tissue, perform functions, go wrong
• How our bodies/life utilize many different DNA systems
• About problems and challenges.
Bio: Peter was a key member of the team that developed the Melbourne/Cochlear multiple-channel cochlear implant. He worked in the field for 30 years and was particularly responsible for the development and improvement of speech processors. In 1979 he designed the first portable Speech Processor for the University of Melbourne device. He joined Cochlear Ltd (Nucleus) in 1983 and was instrumental in speech processor miniaturisation and improvement including the development of custom microchips to implement new speech processing strategies. He holds 21 patents. His special interest was the development of smaller behind-the-ear speech processors and totally implanted cochlear implants.
|16/09/2016 2:00 PM||Ten rules for the interpretation and presentation of data in publications ||Prof David Vaux, Deputy Director, WEHI|
Abstract: Science is knowledge gained through repeated observation or experiment. It is communicated through publication of papers in journals. Science can only flourish if its results are reproducible, journals maintain minimal standards, and papers are read critically. The talk will be illustrated by numerous examples of papers by high profile researchers in prestigious journals that would only have had some value had they been printed on absorbent paper with perforated pages.
Bio: David Vaux is Deputy Director of The Walter and Eliza Hall Institute (WEHI). He graduated in medicine from the University of Melbourne, and then completed a PhD at WEHI before 3 years as a post-doctoral fellow at Stanford. He returned to the WEHI in 1993. For his research on cell death he was awarded the Victoria Prize for science in 2003. He is a Fellow of the Australian Academy of Science and the Australian Academy of Health and Medical Sciences. He is on the Board of the Center for Scientific Integrity, the parent of Retraction Watch. When he isn’t doing research he lobbies for establishment of an Office for Research Integrity in Australia.
|2/09/2016 4:00 PM||Hidden Hearing Loss||A/Prof James Fallon|
Abstract: Recent animal studies have demonstrated that moderate sound exposure can damage up to half the auditory nerves and their synapses, without damaging hair cells. As only a small number of the highly sensitive low-threshold auditory nerve fibres are required for sound detection in quiet environments, there is no loss in auditory sensitivity. Normal auditory thresholds, despite the significant loss of auditory nerve fibres, has led to this type of damage being termed a ‘hidden hearing loss’. To date, the only reported functional consequence of the loss of auditory nerves and their synapses is an increase in median spontaneous firing rate of the auditory nerve fibre population. However, modelling of the loss of functional auditory nerves and their synapses is expected to result in a reduction in temporal fidelity. This project aimed to quantify temporal processing deficits using both behavioural and electrophysiological techniques in an guinea pig model of hidden hearing loss.
Bio: A/Prof James Fallon’s training, like his research interests, is multidisciplinary in nature, and is focused around the successful development and improvement of neural prostheses, with an emphasis on the role of central nervous system plasticity. He has formal training in both physiology and engineering and employs a range of techniques from basic engineering through anatomical studies to behavioural studies. He has over a decade of experience in recording from the central auditory pathway and is considered a world expert on the plastic response of the central auditory system to deafness and subsequent reactivation with a cochlear implant.
|26/08/2016 4:00 PM||The expected benefit of hearing aids as a function of hearing loss||Prof Peter Blamey, Executive Director Operations & Technology, Blamey & Saunders Hearing Pty Ltd|
Abstract: It is often reported clinically that it is important to manage the expectations of clients when fitting hearing aids, but there is little scientific information available about what is a realistic expectation and how to quantify the benefits of hearing aids. The aim of this study was to estimate the speech perception benefits of hearing aid fitting for clients with different degrees of hearing loss. The difference between the aided and unaided percentage correct scores on a monosyllabic word test presented binaurally was used as the measure of benefit. Retrospective data for 592 users of the same type of hearing aid with pure-tone average hearing losses ranging from 6.5 dB HL to 78.5 dB HL in the better ear were analysed using a paired t-test and non-linear regression. The mean benefit for this group of clients was 18.3% with a 95% confidence interval from 17.0% to 19.6% (paired t=27.1, p<0.001). On average, hearing aids halved the error rate for difficult listening tasks in quiet, and listeners can expect to reduce their error rate in running speech by a factor of four. The benefit for this group was approximately equivalent to a 28 dB reduction in hearing loss.
Peter is a hearing scientist, inventor, and entrepreneur who has developed technology and business models that are bringing improved hearing to people throughout Australia. Peter and his business partner, Elaine Saunders, sell premium hearing aids direct to end-users, enabling them to take control of their own hearing through their online company (www.blameysaunders.com.au
). Built on a heritage of research conducted at the Bionics Institute, the company is continuing to innovate and grow, and is starting to manufacture hearing aids in Melbourne. The company won the inaugural Social Innovation section of the Australian Good Design Awards last year.
|5/08/2016 4:00 PM||KinEdge: accurate human motion capture using Microsoft Kinect v2 and computer vision techniques||Gino Coates & Alessandro Timmi, St Vincent's Department of Surgery, The University of Melbourne|
Abstract: Three-dimensional motion analysis has made it possible to analyse different aspects of healthy and pathological human movement. However, motion capture requires expensive and cumbersome multi-camera systems, which track reflective markers attached on the subject’s skin.
The recent release of Microsoft Kinect v2, a gaming device which can track human motion without the need for markers, has generated considerable interest in the biomechanical community, especially given its low cost and portability. However, Kinect v2 marker-less tracking algorithm is highly inaccurate compared to multi-camera motion capture systems: deviations up to 20 cm make this methodology unsuitable for biomechanical or clinical analyses, where accuracy is essential for proper evaluation.
In light of this limitation, we developed an alternative real-time tracking method, based on raw RGB-D data from Kinect v2, custom-made coloured markers and computer vision techniques. Our solution, KinEdge, is one order of magnitude more accurate than the out-of-the-box Kinect v2 marker-less tracking algorithm and runs on consumer-grade PCs. KinEdge can facilitate the adoption of Kinect v2 as a low cost, portable motion tracking solution for biomechanical, rehabilitative, clinical and sports applications. This presentation will walk you through the development of our novel solution and its application for spine tracking and gait analysis.
Gino Coates: I’m a solution architect with over 20 years’ experience, and part time PhD student. My research focuses on building low cost software and hardware solutions for clinical use. I'm interested in biomechanics, software development and practices, science and technology, and Martial-Arts.
Alessandro Timmi: My research interests are focused on the use and adaptation of gaming technologies for human motion capture, musculoskeletal modelling, rehabilitation and sports coaching. Karateka 3rd Dan, YouTuber (check my channel), interested in kinematics, applied mechanics, software development, 3D printing, CAD, CAE, sports engineering and video editing.
|29/07/2016 4:00 PM||Using CRISPR/Cas9 technology to identify and validate novel cell death regulators ||Dr Marco Herold, Laboratory Head, Molecular Genetics of Cancer Division, The Walter & Eliza Hall Institute|
Abstract: CRISPR/Cas9 mediated genome engineering provides an easy and rapid way to edit genes in vitro and in vivo. Initial experimental strategies utilised proved to have a low efficiency and were not broadly applicable to all cell types. In order to overcome this hurdle and to allow for efficient modification of genes in the haematopoietic system, we have developed a novel drug-inducible lentiviral system to deliver the CRISPR/Cas9 platform to cells permitting efficient genome engineering in vitro and in vivo. Additionally we have recently also implemented the CRISPR/Cas9 technology to produce genetically modified mice and to perform whole genome screens.
Bio: Marco Herold is a Laboratory Head in the Molecular Genetics of Cancer Division at WEHI. He is an expert in developing novel mouse models of human cancer, and has brought the CRISPR/Cas9 genome editing technology to WEHI, where he has recently been appointed to the position of Head of the new Genome Editing Laboratory; the task of this laboratory is to generate mutant mice using CRISPR/Cas9 methodology. Dr Herold’s PhD at the University of Würzburg (Germany) addressed key questions in apoptosis and cancer. His major research interest is in the identification of novel genes in apoptosis, and in finding new targets for cancer therapy.
|22/07/2016 4:00 PM||Introducing a silicone process for electrode design ||Frank Rehberger, Masters Student & Research Assistant, University of Freiburg, IMTEK, Laboratory for Biomedical Microtechnology|
Abstract: Silicone as implant material has been used for decades. Spin processing (a technique originating in microelectronic fabrication) can be used to create thin layers of silicone with good control of process parameters. This is an established process and has been used in electrode fabrication previously. Combining this technique with other processes and integration of different materials to tailor the physical properties could create new possibilities for electrode development. Our aim was to set up the basic spin process, then modify it and combine it with available processes. To further raise the potential, we addressed the issue of structuring layer-based materials in three dimensions. The results suggest that this might be useful tools in future electrode Design.
Bio: Frank Rehberger is a student at the Department for Microsystems Engineering at the University of Freiburg. He joined the Laboratory for Biomedical Microsystems as a student assistant in 2013 to work on silicone waveguides for Optogenetics and completed his B.Sc. in 2014. He is currently enrolled in Freiburg to obtain a M.Sc. in the same field. He joined the Bionics Institute on February 2016 for a six-month internship.
|15/07/2016 4:00 PM||Mediolateral balance assessment using tracking tasks||Dr L. Eduardo Cofré Lizama, The University of Melbourne|
Abstract: Falls in older adults and neurological populations have been found to be associated to incorrect weight-shifting during, for example, standing and walking. Therefore, assessment of mediolateral balance is crucial for determining subjects at risk of falling but also to determine efficacy of rehabilitation interventions. However, current clinical tools are direction unspecific, insensitive to subtle deterioration of balance and have ceiling effects. In this regards, the mediolateral balance assessment (MELBA) has been proposed. MELBA consists in tracking predictable and unpredictable visual targets with the centre of pressure (CoP) or mass (CoM) by leaning the whole body sideward. The bandwidth of accurate tracking in terms of phase-shift (delay) and gain (amplitude) are then used to quantify balance control. This tool has shown to be a reliable, valid and sensitive to subtle detriments of ML balance control. Currently MELBA is being studied in neurological populations and further implementation in clinical settings is expected.
Bio: Dr LE (Eduardo) Cofré-Lizama is a physiotherapist from Chile and MSc in Physiotherapy (UNIMELB) who graduated from the MOVE-AGE joint Doctorate program (MOVE Research Institute Amsterdam and KU Leuven) in 2014. His research interests are in the fields of biomechanics and neurosciences and the utilization of motion, force and wearable sensors for the quantification of movement and balance deterioration. He is currently working at MOVElab (RMH-Royal Park) were he is working on projects related to identification of movement biomarkers of MS progression, walking patterns in amputees and neuromodulation in neurological populations.
|1/07/2016 4:00 PM||Application of Literature Mining for Protein Function Prediction||A/Prof Karin Verspoor|
Abstract: The biomedical literature captures the most current biomedical knowledge and is a tremendously rich resource for research. With over 24 million publications currently indexed in the US National Library of Medicine’s PubMed index, however, it is becoming increasingly challenging for biomedical researchers to keep up with this literature. Automated strategies for extracting information from it are required. Large-scale processing of the literature enables direct biomedical knowledge discovery. In this presentation, I will introduce the use of text mining techniques to support analysis of biological data sets, and will specifically discuss applications in protein function and phenotype prediction, facilitated by analysis of the literature and integration with complementary structured resources.
Bio: Karin Verspoor is Associate Professor in the Department of Computing and Information Systems and Deputy Director of the Health and Biomedical Centre at the University of Melbourne. Trained as a computational linguist, Karin’s research primarily focuses on text mining of clinical texts and the biomedical literature to support biological discovery and clinical decision support. Karin held previous posts as the Scientific Director of Health and Life Sciences at NICTA Victoria Research Laboratory, at the University of Colorado School of Medicine, and Los Alamos National Laboratory. She also spent 5 years in start-ups during the US Tech bubble.
|17/06/2016 4:00 PM||Gene therapy for protecting and regenerating sensory cells in the cochlea after hearing loss ||Dr Rachael Richardson, Senior Research Fellow, Bionics Institute|
Abstract: An estimated 360 million people suffer from hearing loss worldwide. Sensorineural hearing loss is characterized by permanent loss of cochlear sensory hair cells and severe degeneration of auditory neurons. The goal of the gene therapy program at the Bionics Institute, headed by Dr Rachael Richardson, is to use gene therapy to protect, repair or regenerate these sensory cells after hearing loss. The gene therapy program broadly encompasses the use of neurotrophin gene therapy for protection and regrowth of auditory neurons, Atoh1 gene therapy for the regeneration of hair cells and optogenetics to allow optical stimulation of auditory neurons. Within these research topics, major research themes have been gene therapy delivery to the cochlea, the impact of the degenerative processes of hearing loss and the effect of cochlear implantation on gene therapy. This presentation will provide an overview of our recent research on gene therapy in the cochlea for protecting and regenerating sensory cells in the cochlea after hearing loss and optogenetics in the cochlea for optical stimulation of auditory neurons.
Bio: Dr Rachael Richardson is currently a Senior Research Fellow at the Bionics Institute. Rachael’s research focus is on gene therapy in the cochlea for the preservation and regeneration of cochlear sensory cells after hearing loss. She is particularly interested in hair cell regeneration using the Atoh1 gene as this has the potential to reverse hearing loss. She uses viral gene therapy techniques to create localized regions of gene expression in the cochlea for sensory cell survival or regeneration. Recently Rachael and her team have also been investigating optogenetics to determine whether auditory neurons can be stimulated more precisely with light compared to electrical stimulation.
Rachael receives competitive funding from the NHMRC as well as from philanthropic sources in Australia and the UK. Dr Richardson completed a BSc degree at the University of Melbourne in Biochemistry and Pathology. Her BSc(Hons) and PhD were undertaken at the Walter and Eliza Hall Institute of Medical Research, Department of Cancer and Haematology, supervised by Prof Doug Hilton. Rachael has worked at the Bionics Institute since 2001.
|10/06/2016 4:00 AM||Why does speech understanding vary among adult cochlear implant (CI) recipients?||Prof Colette M. McKay|
Abstract: Around 30% of adult CI users have poor speech understanding, and rely upon lip-reading for communication. History factors such as duration of deafness account for only around 10% of the variability in outcomes, making poor prognosis a critical clinical issue. Different physiological mechanisms have been proposed to account for poor speech understanding, including patchy survival of peripheral spiral ganglion cells (SGCs) and plastic changes in the central auditory system or in the cortical networks that support language processing. Evidence supporting these mechanisms comes from animal studies and from EEG, imaging, or psychophysical studies in human CI users. However, so far it is unclear whether these mechanisms have independent causal effects on speech understanding, how they could be assessed before implantation, or whether they can be reversed after implantation with targeted therapies or specific signal processing strategies.
In this presentation, I will summarise recent work at the Bionics Institute in which we found strong correlations between poor speech understanding and the following measures: A) variability in thresholds of highly focussed stimuli in a research CI (evidence of patchy SGC survival) B) poor detection ability of small changes in relative current level across different electrode places and C) high activation levels in the bilateral pre-frontal cortices as measured by a novel brain imaging technique called functional near infrared spectroscopy. Finally, I will propose a model that related these measures to poor speech understanding and how the techniques might be used to improve prognosis or individually optimise hearing therapies after implantation.
Bio: Professor McKay is an international leader in the field of psychophysics with electrical stimulation, and her multidisciplinary research combines psychophysics, speech perception, speech processing and mathematical modelling with the aim of improving outcomes of auditory implants. She contributed significantly to the design and signal processing strategies used in the family of cochlear implants manufactured by Cochlear Ltd. She graduated and received her PhD from the University of Melbourne in the fields of mathematics and physics. From 1991-2004, she was Research Fellow, Senior Research Fellow, and then Principal Research Fellow at the University of Melbourne Department of Otolaryngology. From 2005 to 2013 she held chair and research group leadership positions at Aston University, Birmingham, and Manchester University in the UK. Since 2013 she has led the Translational Hearing Research group at the Bionics Institute.
|3/06/2016 4:00 PM||Neurogenesis and neuroprotection against retinal degenerative diseases ||Prof Antonia Angulo Jerez |
Abstract: The retinal neurogenesis has been demonstrated in several mature mammalian retinas. Stem or progenitor cells located in the ciliary body can originate retinal neurons. Our immunohistochemistry and electron microscopy studies have shown cells expressing molecular markers of neural and retinal progenitors in the pars plana of the ciliary body of adult primates and humans. The peripheral retinal margin thus represents, in monkeys and humans, a region where cellular morphological maturation and synaptogenesis is taking place in a fashion recapitulating the normal development of retinal cells. Further knowledge on the cellular extrinsic and intrinsic factors and genes involved in adult retinogenesis in primates will prove useful toward the design of therapies targeting retinal neurodegenerative disorders.
On the other hand, proper development and functioning of the retina requires a precise balance between the processes of proliferation, differentiation and programmed cell death. The retina is one of the most susceptible tissues to reactive oxygen species damage. It has been recently shown that the efficacy of natural products to slow retinal degenerative processes through different pathways. We assess the neuroprotective effect of safranal and tauroursodeoxycholic acid (TUDCA) in an animal model of retinitis pigmentosa (P23H rats). These compounds could be potentially useful for therapeutic applications in retinal degenerative diseases.
Bio: Antonia has a wide researching and teaching activity as a University Tenured Lecturer at the University of Alicante (Spain). She is the head of the Human Anatomy and Embryology Area at the Department of Optics, Pharmacology and Anatomy. Currently she is an Academic Visitor at The Bionics Institute during her sabbatical leave. In 1986 she received her Medicine and Surgery PhD for her contributions to a neurohistological study of auditory pathway development. Antonia is Past-President of Spanish Association of Audiology and she has collaborated on Audiology books, conferences and Masters. She has participated in more than 40 I+D Neurosciences research projects and articles. She has a special interest in neurobiology of the visual and auditory systems and therapy of neurodegenerative diseases.
|20/05/2016 4:00 PM||“Putting out the Garbage” in Parkinson’s Disease ||Dr Richard Peppard, Neurologist, St. Vincent’s Hospital|
Abstract: Parkinson’s disease is a neurodegenerative condition with the following cardinal symptoms: uncontrollable shaking (tremor), excessive muscle tone (rigidity), slowness in movement (bradykinesia), and impaired balance (postural instability). Present therapies such as deep brain stimulation alleviate these symptoms but do not cure the underlying condition. Here, we aim to outline new approaches to slow or reverse neurodegeneration and the role of functional neurosurgery.
Bio: Dr Richard Peppard is a movement disorders neurologist at the St. Vincent’s Hospital and a Honorary Research Fellow at the Bionics Institute. He has more than 25 years of experience treating all stages of Parkinson’s with a special interest in deep brain stimulation. In his practice, more than 50 patients are implanted with neurostimulators each year.
|29/04/2016 4:00 PM||Intellectual Property 101 and the Patent Analytics Hub ||Dr Cameron Lutton|
Abstract: IP Australia is a federal government agency that plays a key role in Australia’s innovation system. IP Australia administers intellectual property (IP) rights in Australia consisting of patents, trademarks, designs and plant breeder rights. Registering IP rights provides innovators with legal framework to protect their ideas. Understanding IP and protecting it early can be very important when establishing products or services in the market. As well as administering the Australian IP rights system, IP Australia established the Patent Analytics Hub to help government agencies, Australian universities and public research sector agencies make the most of their intellectual property. The Hub aids understanding of their technology areas, finding collaborators and boosting the commercial returns from research. Patent analytics can extract useful insights from vast global patent databases, through the mining, visualisation and interpretation of data.
Dr Cameron Lutton
Research Manager – Patent Analytics Hub
Dr Cameron Lutton has a background in polymer chemistry and biomedical engineering. Prior to joining IP Australia, he spent 10 years as a multidisciplinary researcher both in Australia and overseas working on implant design, drug delivery and novel polymers for tissue repair. At IP Australia he gained experience as a senior examiner of patents in the medical devices area, before joining the Patent Analytics Hub as a research manager. Cameron not only brings deep technical scientific knowledge to the role, but also an understanding of the IP system from experience as an examiner and through commercialisation experience gained as an academic.
Research Manager – Patent Analytics Hub
Amy Hunter is a registered Patent and Trade Mark Attorney with fifteen years’ experience in intellectual property. As an attorney, she provided strategic management and business-focussed advice on patent portfolios to a range of clients from small manufacturing businesses to large multinational firms, both in Australia and overseas. Immediately prior to her role as research manager in the Patent Analytics Hub, Amy was a senior examiner in the areas of mechanical engineering, mining engineering and medical devices at IP Australia.
Examiner of Patents – Medical & Mechanical Devices
Cromwel Flores is a patent examiner who has been with the Patent Office for 10 years. He holds a Bachelor of Engineering (Electrical/Computer Science) and a Bachelor of Science (Physiology) from Monash University. Currently he examines patents from the biomedical and mechanical fields.
Examiner of Patents – Medical and Mechanical Devices
Patent Analyst-Patent Analytics Hub
Emma Francis is a senior research analyst in the National Patent Analytics Hub in addition to her role as a patent examiner. She received her Master of Biomedical Engineering from the University of Melbourne in 2010. She also has a Bachelor of Systems Engineering with honours and a Bachelor of Computer Science, both from the ANU. She is passionate about big data and the promises that appropriate analysis of this information can provide. Data visualisation of patent statistics is her current focus, working mainly with Tableau Desktop.
Examiner of Patents – Medical and Mechanical Devices
Kalpana Narayan is a patent examiner working in the area of medical and mechanical devices. She received a Bachelor of Electronic Engineering with Honours and a Masters of Biomedical Engineering from La Trobe University. She has also undertaken postgraduate research at La Trobe University working on a novel method of diagnosing DVT before joining IP Australia.
Examiner of Patents – Medical Devices
Ariane Le Guen is a patent examiner in the medical devices area at IP Australia. She received her Bachelor’s degree in Science in 2008. She worked as a scientist in a diagnostics lab in Pathobiology in the Microbiology department for three years before acquiring her job at IP Australia.
|15/04/2016 4:00 PM||An overview of US-funded neural device efforts and how proposals are reviewed ||Dr Michael Wolfson|
Abstract: In a two-part talk, Dr Wolfson will describe the research portfolio he supports at DARPA and share his perspective on how proposals are reviewed by evaluators. His portfolio includes four research programs at DARPA: RE-NET, HAPTIX, ElectRx, and NESD. Each of these programs has been initiated to solve a specific bioengineering challenge and to demonstrate a new capability. Dr Wolfson will discuss the challenges, discoveries, and new insights gained over the development and execution of these 4-5 year, ~US$60M efforts. These programs encompass the entire spectrum of neural device development, from fundamental research into materials, tissue response, and psychophysics through demonstrations in human volunteers of complete systems and their new functional capabilities. These capabilities include restoration of complex motor control, naturalistic somatosensation, vision, and audition, and modulation of organ function.
In the second part of his talk, Dr Wolfson will provide a framework to help investigators understand the motivations and boundaries that guide reviewers of proposals. Specifically, he will cover review methods, evaluation criteria, and ascertaining the objective of a funding agency and the key requirements in any funding opportunity announcement. Dr Wolfson also will provide general advice to any grant-writer on how to improve the quality of submissions. This portion of the presentation is available for download at: http://www.novelsemi.com/ProposalReview.pdf
Bio: Michael B. Wolfson is a bioelectronics consultant, supporting organizations whose mission is to invest in foundational device research, development of new neurotechnologies, and translation into proof-of-principle demonstrations. He received a Sc.B. degree in electrical engineering from Brown University in 1995 and a Ph.D. degree in electrical engineering from Cornell University in 2001. He is a Senior Member of the IEEE and a member of the Society for Neuroscience.
From 2000 through 2009, Mike was involved in several ventures to develop optical MEMS (micro-electromechanical systems) technologies. His experiences at three startups (Nayna Networks, Exajoule, and RedShift Systems) and one multinational corporation (Sharp Laboratories of America) led him to independent consulting (NovelSemi Solutions). From 2009 through 2013, he was a subject matter expert for System Planning Corporation, providing full-time support to the MEMS and neuro-technology programs in DARPA's Microsystems Technology Office. Since 2014, Mike has been an independent consultant supporting customers such as GlaxoSmithKline and DARPA's Biological Technologies Office. His research interests include non-traditional manufacturing technologies and the scalability of neural interfaces.
|8/04/2016 4:00 PM||Feasibility of a minimally invasive Endovascular Neural Interface for recording cortical activity||Dr Sam John|
Abstract: Intracranial electrode arrays for recording and stimulating brain activity have facilitated major advances in the treatment of neurological conditions. Traditional arrays require direct implantation into the brain via open craniotomy. Invasive surgery is associated with inflammatory tissue responses and can reduce efficacy of stimulation and sensitivity of recording. There is a need for minimally invasive techniques that can record chronic neural activity.
We demonstrate the feasibility of a minimally invasive endovascular neural interface (ENI) that can record brain activity from within a cortical vein. The ENI was fabricated on intracranial stents that are presently used in stroke clot removal. The ENI was delivered into a superficial cortical vein overlying the motor cortex using contrast enhanced angiography and co-axial catheterization in sheep.
The ENI was successfully implanted in sheep and was able to record somatosensory evoked potentials for 190 days. Impedance changes show that incorporation of the ENI into the blood vessel wall occurs within 14 days of implantation and vessel lumen remained open for the duration of the study (190 days). The bandwidth of recording, was similar to an epidural array and marginally inferior to a subdural array. We show that an endovascular neural interface offers a method for safe implantation and chronic neural recordings.
Bio: Sam John is a research fellow in the Department of Electrical and Electronic Engineering at the University of Melbourne. He received his PhD in 2013 from La Trobe University while working on the Bionic eye project at the Bionics Institute. His present research is evaluating the efficacy of an endovascular neural interface that can record and stimulate the brain. He is also working on developing a lower limb brain computer interface that can assist with mobility in people affected by paralysis.
|1/04/2016 4:00 PM||Exercise and physical activity for people with Parkinson's disease: Challenges in clinical practice and research ||A/Prof Jennifer McGinley|
Abstract: Parkinson’s disease (PD) is a common and disabling neurodegenerative condition that is rapidly rising in prevalence. With medical advances, people with PD live an increasingly long lifespan, but experience difficulty with mobility, activities of daily living and societal participation.
Exercise limits disability progression; people who exercise regularly have lesser decline and better physical function, mobility and quality of life. Despite these known benefits, most people with PD have sedentary lifestyles and limited adherence to ongoing exercise is a major challenge in lifelong management.
Health behaviour change interventions can be developed to promote long term exercise and physical activity habits throughout life. Such interventions need to be guided by an understanding of factors associated with exercise and physical activity behaviour in Parkinson’s. This seminar will present findings from a recent large study of Australians living with PD, and the factors that promote or limit ongoing engagement in a physically active lifestyle. Current challenges in conducting clinical trials of new interventions and implementation will be discussed.
Bio: Associate Professor Jenny McGinley is a physiotherapist and Deputy Head of the Physiotherapy Department, University of Melbourne, Australia. Her research has focussed on the measurement and understanding of movement and function across the lifespan in healthy people and those with neurological conditions including Parkinson’s disease, stroke, cerebral palsy and autism. She has a particular interest in gait outcome measures for clinical practice and research, as well as clinical trials of interventions to improve functional mobility.
Her current research aims to understand how people with Parkinson’s disease and other neurological disorders can stay active during daily life, and the factors that influence regular physical activity
|18/03/2016 4:00 AM||Insights into neuropathology using speech ||Dr Adam Vogel|
Abstract: Speech is a potent marker of brain function. It changes with the onset of neurological illness and it declines with disease progression. Certain transient conditions such as depression and fatigue also affect the quality of speech, making it a sensitive marker of central nervous system integrity.
In this context, speech can be used to track disease progression in degenerative diseases such as Parkinson’s disease or hereditary ataxia. Similarly, objective measures of speech can assist in monitoring performance in clinical trials where changes in brain health are anticipated.
Bio: Adam is director of the Centre for Neuroscience of Speech at The University of Melbourne. His team works towards improving speech, language and swallowing function in people with progressive and acquired neurological conditions. He is a recipient of an NHMRC Career Development Fellowship, a senior lectureship in the Department of Audiology and Speech Pathology at The University of Melbourne and a Humboldt Fellowship based at the Hertie Institute for Clinical Brain Research, Tübingen Germany.
He holds clinical degrees in psychology and speech pathology from the University of Queensland and a PhD in behavioural neuroscience from The University of Melbourne. He undertook his early clinical training in the neurodisability service at Great Ormond Street Hospital London and continues to work as consultant speech pathologist for the Friedreich Ataxia Clinic, Murdoch Children’s Research Institute and the Eastern Cognitive Disorders Clinic, Eastern Health, Melbourne.
|11/03/2016 4:00 AM||Objective Assessments in Parkinson’s Disease ||Professor Malcolm Horne |
Abstract: In medicine, effective management of disease depends on measurements that accurately relate to the therapies so that those therapies can be effectively deployed to maximise benefit and reduce side effect.
The Parkinson’s Kinetigraph (PKG) is the first objective measurement for drug responsive symptoms of PD. This talk will discuss the development, application and commercialisation of the PKG.
Bio: Malcolm Horne is an NHMRC Practitioner Fellow at the
Florey Neurosciences Institute, a consultant Neurologist specialising in Parkinson’s Disease at the St. Vincent’s Hospital and an Adjunct Professor in the Department of Medicine at St Vincent’s Hospital.
His research interests relate to various facets of Parkinson's Disease. These include studies into the cause of PD including the repair of the brain damaged by PD, measuring PD and the normal and disordered function of dopamine in the brain.
Current interest also include studies aimed at detecting people at high risk of developing Parkinson’s Disease. He has developed the Australian Parkinson's Disease registry and the Parkinson’s Kinetigraph.
|4/03/2016 4:00 AM||Engineering better patient outcomes for visual prostheses ||Dr Matt Petoe|
Abstract: Over the last decade, retinal prostheses ('bionic eyes') have emerged as the most promising technology to restore vision to those with blindness caused by photoreceptor loss.
In an idealised representation of artificial vision, an image captured by the head-mounted video camera is transmitted to the electrode stimulation site on the retina and perceived as a clearly defined set of pixels. The reality of artificial vision is quite different however, with patients reporting perception that is very much unlike their previous sighted experience. In spite of this, it is possible for bionic eye recipients to routinely perform tasks of orientation and mobility, as well as improve performance in activities of daily living.
This talk will discuss some of the challenges faced by bionic eye recipients and discuss ways to identify patient behaviours and tailor post-implantation rehabilitation accordingly.
Bio: Dr Matt Petoe is a biomedical engineer with a keen interest in human perception, neuroscience and clinical research. He is currently working within the Bionic Vision research team to trial the safety and efficacy of a next generation, wide-view bionic eye.
|19/02/2016 4:00 PM||Restoration of arm function after neurological insult||Prof Mary Galea,Department of Medicine (Royal Melbourne Hospital), The University of Melbourne|
Abstract: Loss of hand function, as may occur after stroke or spinal cord injury, has a severe impact on day-to-day activities and a person’s independence. A vast neural network at both cortical and spinal levels is dedicated to control of hand function, and spared pathways can provide the structural basis for recovery of function after damage to a particular region.
The clinical challenges involve the questions of how to activate the remaining pathways after brain injury, and how to maximise function after spinal cord injury which interrupts the connections between the brain and spinal cord. This talk will cover the physiological basis for recovery of function as well as examples of clinical research programs investigating restoration of function after stroke and spinal cord injury.
Bio: Mary Galea is a physiotherapist and neuroscientist whose research program includes both laboratory-based and clinical projects with the overall theme of control of voluntary movement by the brain, and factors that promote recovery following nervous system damage. She has a particular interest in recovery of arm function, and is currently undertaking projects in patients with stroke, spinal cord injury and multiple sclerosis.
|12/02/2016 4:00 PM||A novel balance disorder: Cerebellar Ataxia with Neuropathy and Vestibular Areflexia Syndrome (CANVAS)||Dr David Szmulewicz, Neurologist & Neuro-otologist, RVEEH |
Abstract: Patients with combined cerebellar and vestibular impairment were first identified in 1979 and were studied as a pathophysiological model. The syndrome of Cerebellar Ataxia with Bilateral Vestibulopathy (CABV) and it’s characteristic oculomotor abnormality, that is, the abnormal visually-enhanced vestibulo-ocular reflex (VVOR) was then subsequently described in 2005 in 4 patients, 3 of whom had a peripheral sensory deficit.
This work defines a new neurological disease that is now called ‘CANVAS’: an acronym for Cerebellar Ataxia with Neuropathy and bilateral Vestibular Areflexia Syndrome. We detail the (A) clinical presentation and evolution, (B) essential oculomotor and vestibular abnormalities, (C) neuropathology, (D) otopathology, (E) anatomical pattern of cerebellar atrophy, (F) neurophysiological characteristics of the somatosensory impairment, (G) differential diagnoses, (H) apparent genetic basis and (I) a diagnostic quantitative bedside oculomotor test.
Bio: David Szmulewicz is a Neurologist, Neuro-otologist and medical researcher. He holds a PhD from the University of Melbourne. His clinical and research interests include balance disorders that affect the vestibular system, cerebellum and the combination of the two. He is the head of the Balance Disorders & Ataxia Service at the Royal Victorian Eye & Ear Hospital, consults at the Balance Disorders Clinic at Epworth Camberwell, Honorary consultant Neurologist at St Vincent’s Hospital and Lecturer at Melbourne University.
David is lead investigator on research defining a novel ataxia – Cerebellar Ataxia with Neuropathy and Vestibular Areflexia Syndrome (CANVAS) and is co-director of The Australian Temporal Bone Bank.
|5/02/2016 4:00 PM||Argus II Retinal Chip Implant - Endoscopic Insights on the Bionic Eye||Dr Flavio Rezende,Retinal Surgeon, Department of Ophthalmology, Maisonneuve-Rosemont Hospital, Canada|
Abstract: The presentation will describe the current Argus II retinal chip implant surgical technique, its potential complications and limitations. It will highlight as well some insights on vitreoretinal endoscopic imaging of this technique.
Bio: Dr Flavio Rezende is a reputed retinal surgeon from the Department of Ophthalmology at Maisonneuve-Rosemont Hospital. He secured a Ph.D. in Science from São Paulo Federal University (Brazil) after completing his fellowships in vitreoretinal surgery and ocular pathology at the Department of Ophthalmology, McGill University (Canada). Flavio went on to pursue post-doctoral studies in Ophthalmology at Université de Montréal, where he became Chief of Retinal Service in the Department of Ophthalmology and serves as associate professor. In addition to instruction mandates in prestigious institutions such as Harvard Medical School and Pontifícia Universidade Católica in Rio de Janeiro, Flavio garners experience with a dozen clinical trials and research projects, and has many awards, namely 5 ASRS Rhett Buckler Awards. He has co-published well over 50 books, papers, and abstracts covering various aspects of retinal surgery. Dr. Rezende is the 1st surgeon to perform a bionic retinal implant in Quebec, and the 2nd in Canada.
|29/01/2016 4:00 PM||Reverse Engineering the Brain: Computer Modelling of Neural Circuits||Dr Dean Freestone, University of Melbourne|
Abstract: This presentation is focused on methods for reverse engineering the brain. In this talk, I will discuss various approaches for constructing computer models of neural circuits using experimental and clinical data. The computer models describe data recorded at the local field potential or electroencephalogram scale, and are therefore coarse grain approximations of neural activity. I will show examples of how we can use various modelling approaches to decode the mechanisms of epileptic seizures and movement related activity from neural signals.
Bio: Dean has a Bachelor of Engineering from La Trobe University, where he won the Tad Szental Prize for the best engineering final year student and the Hooper Memorial Prize for best final year project, under the supervision of Graeme Rathbone. He then completed a PhD in Engineering at the University of Melbourne in 2012, under the supervision of David Grayden, Tony Burkitt, Levin Kuhlamnn and Mark Cook. His postgraduate work on epileptic seizure prediction won the John Melvin Memorial Scholarship for the best PhD in Engineering and the Chancellor’s Prize for PhD Excellence. Dean has recently returned from Liam Paninski’s group at Columbia University, New York, where he was the 2014 Victorian Fulbright Postdoctoral Fellow. He has now joined the MDHS Faculty at the University of Melbourne and is working in the Department of Medicine at the St. Vincent’s Hospital where he will continue to make inroads into one of the grand challenges in science today: reverse engineering the human brain.