The development of a knee locker with close-loop functional electrical stimulation (FES) for hemiplegia in gait training

Yu Luen Chen, Walter H. Chang, Shih Ching Chen, Peng Fei Sheu, Weoi Luen Chen

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Purpose: A knee locker with closed-loop functional electrical stimulation (FES) system has beendeveloped to prevent the quadriceps weakness and the drop-foot of the hemiplegia during gait training. Method: The FES system is triggered by a footswitch on the heel of the disabled foot to stimulate the tibialis anterior muscle for dorsi-flexion and to turn-off the knee locker in the swing phase through the main controller. Besides, the footswitch on the heel of the affected-side can be used to stimulate the quadriceps and to turn-on the knee locker for quadriceps weakness in the stance phase. Results: It is revealed that the mean velocity, cadence, stride length, active ankle motion range, and functional ambulation category (FAC) have improved significantly from 0.15 ± 0.04 m sec-1, 43.3 ± 15.4 steps min-1, 0.36 ± 0.11 m, 15°, level 2 to 0.43 ± 0.21 m sec-1, 69.4 ± 19.1 steps min-1, 0.73 ± 0.17 m, 40°, level 4 respectively for the patient. A paired t-test indicated that differences in the electromyography (EMG) of the tibialis anterior and the quadriceps muscles between patient's disabled (affected-side) foot and normal (unaffected-side) foot are not significant (p > 0.05) after 16 weeks of training. Conclusions: It is concluded that this new knee locker with closed-loop FES system is capable of providing the hemiplegia with restoration to regular walking after appropriate gait training.

Original languageEnglish
Pages (from-to)916-921
Number of pages6
JournalDisability and Rehabilitation
Volume25
Issue number16
DOIs
Publication statusPublished - Aug 19 2003
Externally publishedYes

Fingerprint

Hemiplegia
Gait
Electric Stimulation
Foot
Knee
Heel
Walking
Quadriceps Muscle
Electromyography
Articular Range of Motion
Ankle
Muscles

ASJC Scopus subject areas

  • Rehabilitation
  • Health Professions(all)

Cite this

The development of a knee locker with close-loop functional electrical stimulation (FES) for hemiplegia in gait training. / Chen, Yu Luen; Chang, Walter H.; Chen, Shih Ching; Sheu, Peng Fei; Chen, Weoi Luen.

In: Disability and Rehabilitation, Vol. 25, No. 16, 19.08.2003, p. 916-921.

Research output: Contribution to journalArticle

Chen, Yu Luen ; Chang, Walter H. ; Chen, Shih Ching ; Sheu, Peng Fei ; Chen, Weoi Luen. / The development of a knee locker with close-loop functional electrical stimulation (FES) for hemiplegia in gait training. In: Disability and Rehabilitation. 2003 ; Vol. 25, No. 16. pp. 916-921.
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