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FES therapy for improving grasping in individuals after SCI and brain machine interface

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Abstract:
FES Therapy
Since 2002, functional electrical stimulation (FES) therapy has been used at Toronto Rehab on patients with spinal cord injuries (SCI) in an effort to facilitate improved voluntary arm and hand functions. By improving a patientís ability to reach, grasp and release everyday objects, we hoped to see increased independence in activities of daily living. It was anticipated that the application of daily FES therapy, in addition to regular occupational therapy and physiotherapy, would facilitate the restoration of neurological function in the arm, wrist or fingers. We were examining the carryover effect of using a neuroprosthesis for grasping on our patients. The results were compared to controls that received regular physiotherapy and occupational therapy, including electrical stimulation for muscle strengthening but without the functional component.

Brain Machine Interface
The purpose of this study was to explore the possibility of using electrocorticographic (ECoG) recordings from subdural electrodes placed over the motor cortex to identify the upper limb motion performed by a human subject. More specifically, we were trying to identify features in the ECoG signals that could help us determine the type of movement performed by an individual. Two subjects who had subdural electrodes implanted over the motor cortex were asked to perform various motor tasks with the upper limb contralateral to the site of electrode implantation. ECoG signals and upper limb kinematics were recorded while the participants were performing the movements. The results of this study suggest that one can determine with the classification accuracy of 89% which movement the individual was performing with the arm using ECoG signals alone.

http://www.toronto-fes.ca/
Type of Seminar:
Public Seminar
Speaker:
Prof. Milos Popovic
Toronto Rehab Chair in Spinal Cord Injury Research
Date/Time:
Jul 11, 2008   9:30 /
Location:

ETH Zentrum, Building ETZ, room E 9
Contact Person:

Prof. S. Micera
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Biographical Sketch:
Milos R. Popovic received the Ph.D. degree in mechanical engineering from the University of Toronto, Canada in 1996, and the Dipl. Electrical Engineer degree from the University of Belgrade, Yugoslavia in 1990.
Milos Popovic is Toronto Rehab Chair in Spinal Cord Injury Research. He is also an Associate Professor in the Institute of Biomaterials and Biomedical Engineering at the University of Toronto, and Senior Scientist and the Activity Team Leader at Toronto Rehabilitation Institute, both institutions located in Toronto, Canada.
Milos Popovic joined the Institute of Biomaterials and Biomedical Engineering and the Toronto Rehab in 2001. From 1997 until 2001 he was leading the Rehabilitation Engineering Team at the Swiss Federal Institute of Technology (ETH) and the Paraplegic Center of the University Hospital Balgrist, both in Zurich, Switzerland. From 1996 until 1997, he worked for AlliedSignal Aerospace Canada Inc. in Toronto, Canada.
Milos Popovicís fields of expertise are functional electrical stimulation, neuro-rehabilitation, modeling and control of linear and non-linear dynamic systems, robotics, power systems, signal processing, and safety analysis. His interests are in the areas of neuro-rehabilitation, physiological control systems, assistive technology, and brain machine interfaces.
In 1997, together with Dr. Thierry Keller, he received the Swiss National Science Foundation Technology Transfer Award - 1st place. In 2008, Milos Popovic received the Research and Development Award from the Professional Engineers of Ontario and Ontario Society of Professional Engineers. He is also one of the co-founders of the Canadian National Spinal Cord Injury Conference established in 2004.