Intermittent transmission in the reciprocal inhibitory pathway from flexor muscle Ia afferents to extensor motoneurons in man.
Variations in soleus reflex EMG following single conditioning stimuli to tibialis anterior Ia afferents were quantified in man by means of a simple index of inhibition. Probability of test reflex depression was greatly increased at conditioning-testing intervals of 1-4 ms, although the magnitude of depression was small. These findings are consistent with the existence of intermittent but functionally effective Ia reciprocal inhibitory transmission onto soleus motoneurons.
D000293:Adolescent; D000328:Adult; D000344:Afferent Pathways / Q000502:physiology*; D003214:Conditioning, Classical; D004576:Electromyography; D006801:Humans; D008875:Middle Aged; D009046:Motor Neurons / Q000502:physiology*; D009132:Muscles / Q000294:innervation*; D009435:Synaptic Transmission