TY - JOUR
T1 - The effects of dual-channel functional electrical stimulation on stance phase sagittal kinematics in patients with hemiparesis
AU - Springer, Shmuel
AU - Vatine, Jean Jacques
AU - Wolf, Alon
AU - Laufer, Yocheved
PY - 2013/4
Y1 - 2013/4
N2 - Sixteen subjects (aged 54.2. ±. 14.1. years) with hemiparesis (7.9. ±. 7.1. years since diagnosis) demonstrating a foot-drop and hamstrings muscle weakness were fitted with a dual-channel functional electrical stimulation (FES) system activating the dorsiflexors and hamstrings muscles. Measurements of gait performance were collected after a conditioning period of 6. weeks, during which the subjects used the system throughout the day. Gait was assessed with and without the dual-channel FES system, as well as with peroneal stimulation alone. Outcomes included lower limb kinematics and the step length taken with the non-paretic leg. Results with the dual-channel FES indicate that in the subgroup of subjects who demonstrated reduced hip extension but no knee hyperextension (n=9), hamstrings FES increased hip extension during terminal stance without affecting the knee. Similarly, in the subgroup of subjects who demonstrated knee hyperextension but no limitation in hip extension (n=7), FES restrained knee hyperextension without having an impact on hip movement. Additionally, step length was increased in all subjects. The peroneal FES had a positive effect only on the ankle. The results suggest that dual-channel FES for the dorsiflexors and hamstrings muscles may affect lower limb control beyond that which can be attributed to peroneal stimulation alone.
AB - Sixteen subjects (aged 54.2. ±. 14.1. years) with hemiparesis (7.9. ±. 7.1. years since diagnosis) demonstrating a foot-drop and hamstrings muscle weakness were fitted with a dual-channel functional electrical stimulation (FES) system activating the dorsiflexors and hamstrings muscles. Measurements of gait performance were collected after a conditioning period of 6. weeks, during which the subjects used the system throughout the day. Gait was assessed with and without the dual-channel FES system, as well as with peroneal stimulation alone. Outcomes included lower limb kinematics and the step length taken with the non-paretic leg. Results with the dual-channel FES indicate that in the subgroup of subjects who demonstrated reduced hip extension but no knee hyperextension (n=9), hamstrings FES increased hip extension during terminal stance without affecting the knee. Similarly, in the subgroup of subjects who demonstrated knee hyperextension but no limitation in hip extension (n=7), FES restrained knee hyperextension without having an impact on hip movement. Additionally, step length was increased in all subjects. The peroneal FES had a positive effect only on the ankle. The results suggest that dual-channel FES for the dorsiflexors and hamstrings muscles may affect lower limb control beyond that which can be attributed to peroneal stimulation alone.
KW - Functional electrical stimulation (FES)
KW - Gait
KW - Hemiparesis
KW - Kinematics
UR - http://www.scopus.com/inward/record.url?scp=84875363937&partnerID=8YFLogxK
U2 - 10.1016/j.jelekin.2012.10.017
DO - 10.1016/j.jelekin.2012.10.017
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C2 - 23231828
AN - SCOPUS:84875363937
SN - 1050-6411
VL - 23
SP - 476
EP - 482
JO - Journal of Electromyography and Kinesiology
JF - Journal of Electromyography and Kinesiology
IS - 2
ER -