EMG analysis of stereotyped voluntary movements in man.
Journal of Neurology Neurosurgery & PsychiatryPublished 1 December 1975Open access
Mark Hallett, Bhagwan T. Shahani, Robert R. Young
Citations467
SJR quartileQ1
SJR score3.38
SNIP2.41
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TL;DR
Physiological mechanisms underlying these patterns are analysed and an important conclusion is that the triphasic activity with fast flexion is 'centrally programmed'.
Abstract
EMG activity was recorded in biceps and triceps while subjects voluntarily flexed their elbows during a visual matching task. With fast flexion, the initial EMG was characterized by a triphasic pattern with a burst of activity first in biceps, then in triceps with a silent period in biceps, and finally in biceps again; these components were analysed quantitatively. Smooth flexion was characterized by continuous activity in biceps. Inhibition of tonic activity of triceps in relation to a fast flexion occurred in the 50 ms before the initiation of biceps activity. A patients with a severe pansensory neuropathy performed normally on these tasks. Physiological mechanisms underlying these patterns are analysed; an important conclusion is that the triphasic activity with fast flexion is 'centrally programmed'.
Keywords
Engineering
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