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- Title
Modulations of soleus H-reflex excitability during gait initiation: central versus peripheral influences.
- Authors
Trimble, Mark H.; Brunt, Denis; Jeon, Hye-Seon; Kim, Hyeong-Dong; Trimble, M H; Brunt, D; Jeon, H S; Kim, H D
- Abstract
Soleus and tibialis anterior electromyogram (EMG) and soleus H-reflexes were recorded from the stance limb of an individual who suffered a traumatic peroneal nerve injury and of four nonimpaired individuals during gait initiation. The control subjects also initiated walking after swaying forward (sway-gait initiation), which eliminated the initial tibialis anterior activation. During the initial period of gait initiation, H-reflexes were depressed to 43% of standing values during normal-gait initiation and 86% during sway-gait initiation in the nonimpaired subjects. H-reflexes of the nerve-injured subject were depressed to 37%, even though no tibialis anterior EMG was observed. The findings support the view that reciprocal inhibition of the soleus during a task, which normally involves tibialis anterior activation, is due to a centrally mediated process.
- Publication
Muscle & Nerve, 2001, Vol 24, Issue 10, p1371
- ISSN
0148-639X
- Publication type
journal article
- DOI
10.1002/mus.1158