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  • Title: Modulations of soleus H-reflex excitability during gait initiation: central versus peripheral influences.
    Author: Trimble MH, Brunt D, Jeon HS, Kim HD.
    Journal: Muscle Nerve; 2001 Oct; 24(10):1371-9. PubMed ID: 11562919.
    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.
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