Journal ArticleDOI
Interactions between voluntary and postural mechanisms of thehuman motor system.
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This article is published in Journal of Neurophysiology.The article was published on 1970-05-01. It has received 188 citations till now.read more
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Spinal inhibition in man: depression of the soleus H reflex by stimulation of the nerve to the antagonist muscle.
A El-Tohamy,E M Sedgwick +1 more
TL;DR: The results confirm earlier descriptions of D1 and show an intracord latency of approximately 4‐5 msec and a reduction of the H reflex by about 60% and the possibility that D1 is mediated by low threshold muscle afferents is discussed.
Journal ArticleDOI
Reaction time and spinal excitability in a simple reaction time task
TL;DR: It was found that a reflex stimulus presented in close temporal proximity to the RS significantly shortened RT in comparison with the RT when no reflex stimulus was presented.
Journal ArticleDOI
Electromyographic responses to an unexpected load in fast voluntary movements: descending regulation of segmental reflexes.
TL;DR: The hypothesis that the timing of the EMG response to an unexpected load is related to a velocity error threshold is rejected and it is suggested that the timed response is primarily determined by descending regulation of segmental reflex gain.
Journal ArticleDOI
Time requirements of changes in program and parameter variables in rapid ongoing movements.
John T. Quinn,David E. Sherwood +1 more
TL;DR: The results support the generalized motor program hypothesis of Pew (1974) and Schmidt (1976) in that increasing the speed of an ongoing movement may require modification of a parameter variable while reversing movement direction requires the implementation of a new motor program.
Journal ArticleDOI
Changes in spinal excitability during choice reaction time: The H reflex as a probe of information transmission
TL;DR: The modulations in amplitude of H reflexes elicited in a hand muscle, the flexor pollicis brevis, during the performance of a choice reaction time (RT) task in which this muscle was directly involved supported the assumptions that are at the core of Sternberg's additive factor method.