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Modulation of vastus medialis motoneuronal excitability by sciatic nerve afferents
Author(s) -
VallsSolé Josep,
Hallett Mark,
BrasilNeto Joaquim
Publication year - 1998
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(199807)21:7<936::aid-mus12>3.0.co;2-o
Subject(s) - sciatic nerve , vastus medialis , neuroscience , medicine , electrophysiology , anatomy , electromyography , psychology
We activated the sciatic nerve afferents by either the discharge of a magnetic coil or a needle inserted near the nerve. Both types of stimulation induced facilitation of the vastus medialis (VM) H reflex, and of the VM response to transcranial magnetic stimulation, at the joint time of arrival of conditioning and test volleys, while a subsequent inhibition was induced only in the H reflex. We conclude that sciatic nerve afferents induce reciprocal inhibition of VM motoneurons presynaptically on the Ia afferent terminals. © 1998 John Wiley & Sons, Inc. Muscle Nerve 21:936–939, 1998.