Abstract
Conditioning stimulation of the peroneal nerve at rest produces a decrease in the N-response of the antagonist (soleus) muscle. The short latency of this inhibitory effect (not more than 2 msec) indicates that it is produced by the spinal reciprocal inhibition system (SRIS). Paired stimulation with a fixed delay of 3 msec between conditioning stimulation of the peroneal nerve and testing stimulation of the tibial nerve indicates that during the last 30 msec before voluntary movement (rapid dorsiflexion of the foot) reciprocal inhibition of the motoneuronal nucleus of the soleus muscle, the antagonist of the voluntary movement, is strengthened. During organization of the voluntary movement there is supraspinal facilitation (tuning) of the SRIS. Supraspinal regulation of the SRIS is one of the mechanisms of central control over the segmental centers of antagonist muscles.
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Kots, Y.M., Zhukov, V.I. Supraspinal control over segmental centers of antagonist muscles in man. III. Tuning of spinal reciprocal inhibition system during organization preceding voluntary movement. Neurosci Behav Physiol 6, 9–15 (1973). https://doi.org/10.1007/BF01185998
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DOI: https://doi.org/10.1007/BF01185998