Absract: This talk covers intracortical multichannel monitor, recorder and microstimulator intended to interface the primary visual cortex region located in the occipital side of the brain. Designed for patients who are blind, the system is composed of multiunits and requires 3D microelectrodes in order to act in various cortical layers and to ease its insertion and placement in the dedicated cortical region. In addition to stimulation, the system must be able to monitor the stimulation sites conditions and to assert the expected stimulation parameters. The device is composed of 1) an external controller grouping a camera, instructions generator, and wireless energy and bidirectional data interface, and 2) an implant including a wireless interface, voltage regulators, stimulators and pyramidal-shaped microelectrodes array. Preliminary stimulation validation was done in a rat, and neurorecording from the primary vision region followed by the population neural coding to learn about the vision process are performed in Monkeys.
Bio: Prof. Mohamad Sawan is Chair Professor in Westlake University, Hangzhou, China, where he is founder and director of the Cutting-Edge Net of Biomedical Research And INnovation (CenBRAIN). Dr. Sawan received the Ph.D. degree in electrical engineering from Université de Sherbrooke, Canada, in 1990. He is in leave from Polytechnique Montréal where he was a Professor of Microelectronics and Biomedical Engineering (1991-…). He is Co-Founder, Associate Editor and Editor-in-Chief of the IEEE Transactions on Biomedical Circuits and Systems, and Associate Editor of the IEEE Transactions on Biomedical Engineering. He is founder of the International IEEE-NEWCAS Conference and of the Polystim Neurotech Laboratory, and Co-Founder of the International IEEE-BioCAS Conference, and the International IEEE-ICECS. General Chair of the 2016 IEEE International Symposium on Circuits and Systems (ISCAS), and General Chair of the 2020 IEEE International Medicine, Biology and Engineering Conference (EMBC). His scientific interests are the design and testing of analog and mixed-signal circuits and systems, signal processing, modeling, integration, assembly, and bio-validation. He was awarded the Canada Research Chair in Smart Medical Devices (2001-2015), and was leading ReSMiQ, the Microsystems Strategic Alliance of Quebec (1999-2018). Dr. Sawan published more than 800 peer reviewed papers, two books, 10 book chapters, and 12 patents. He received several awards, among them the Barbara Turnbull 2003 Award for spinal cord research, the Bombardier and Jacques-Rousseau Awards. Dr. Sawan is Fellow of the IEEE, Fellow of the Canadian Academy of Engineering, Fellow of the Engineering Institutes of Canada, and “Officer” of the National Order of Quebec.