We evaluated the ability to determine the intent to step during level overground walking using surface electromyogram (EMG) from both nondisabled volunteers and individuals with incomplete spinal cord injury. Our goal was to specify a process for selecting muscles for a new command and control interface that can be implemented with only two channels of implanted EMG-recording electrodes with the use of functional electrical stimulation (FES). We found that discriminability index is a good metric to evaluate the potential of controlling FES-assisted ambulation. Our results showed that the command sources can be selected objectively from surface EMG before a fully implantable EMG-triggered FES system for walking is implemented.
Volume 48 Number 8, 2011
Pages 935 — 948
Last Reviewed or Updated Friday, October 14, 2011 9:37 AM