Responsiveness of the H reflex to loading and posture in patients following stroke

Ing Shiou Hwang, Chih Feng Lin, Li Chen Tung, Chun Hou Wang

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)


The objective of the research was to examine the effects of loading and posture on motoneuronal excitability of the triceps surae (TS) for patients with hemiplegia. Twelve healthy subjects and 12 patient subjects with post-stroke hemiparesis (onset period: 3-60 months) were enrolled in this study. The subjects were instructed to remain in quiet sitting with the test knee straight and three standing conditions of different superincumbent loads by shifting body weight to the test leg (10%, 50%, and 90% of body weight), while the H reflexes and M waves of the TS were measured. The results clearly indicated that H reflex amplitudes were not affected by different loading conditions in standing for both healthy subjects and patients who had a previous stroke. In addition, the H reflex amplitude in quiet standing for healthy subjects was significantly downward modulated relative to that in relaxed sitting with the test knee straight, but this posturally driven modulation was impaired in patients following stroke. Current electrophysiological findings imply that body weight as a means for rehabilitation facilitation had little immediate effect on paretic TS, and absence in postural gating of reflex excitability appeared to be an incentive for postural instability resulting from post-stroke hemiparesis.

頁(從 - 到)653-659
期刊Journal of Electromyography and Kinesiology
出版狀態Published - 2004 12月

All Science Journal Classification (ASJC) codes

  • 神經科學(雜項)
  • 生物物理學
  • 神經病學(臨床)


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