Peer-Reviewed Journal Details
Mandatory Fields
O'Keeffe, DT; Donnelly, AE; Lyons, GM
2003
September
Ieee Transactions On Neural Systems And Rehabilitation Engineering
The development of a potential optimized stimulation intensity envelope for drop foot applications
Published
()
Optional Fields
drop foot electromyography (EMG) functional electrical stimulation (FES) hemiplegia stimulator stimulus pattern ELECTRICAL-STIMULATION STIMULUS ARTIFACT PERONEAL NERVE ELECTROMYOGRAPHY SUPPRESSION GAIT
11
3
249
256
An optimized stimulation intensity envelope for use in hemiplegic drop foot applications has been developed. The traditional trapezoidal stimulation intensity approach has been examined and found to be inconsistent with the muscle activity patterns observed in healthy gait and therefore unsuitable. Experimental functional electrical stimulation (FES)-elicited tibialis anterior (TA) electromyography (EMG) data was taken over the ankle range of interest (occurring during active dorsiflexion and loading response) while also taking into account the type of TA muscle contraction occurring (concentric, eccentric, and isometric) and the speed of hemiplegic ankle joint rotation. Using the processed data, a model of normalized EMG versus pulsewidth was developed. Implementation of this model showed the unsuitability of the trapezoidal approach in the reproducing of a natural EMG profile. An optimized stimulation intensity profile is proposed which is expected to accurately reproduce the natural TA EMG profile during gait.
1534-4320
10.1109/TNSRE.2003.817678
Grant Details