Electromyographic assessment of central motor disorders | Zendy

Wiesendanger Mario | Zendy; Rüegg Dieter G. | Zendy

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Electromyographic assessment of central motor disorders

Author(s) -

Wiesendanger Mario,

Rüegg Dieter G.

Publication year - 1978

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/mus.880010512

Subject(s) - coactivation , electromyography , physical medicine and rehabilitation , medicine , neuroscience , muscle tone , elbow , reciprocal inhibition , agonist , forearm , hindlimb , psychology , anatomy , inhibitory postsynaptic potential , receptor

Experimental procedures are described that were designed to assess central motor disorders quantitatively. Initially delineated is a study of triggered ballistic movement performed in a reaction‐time situation. The reciprocal triphasic EMG pattern recorded in an antagonistic muscle pair was clearly abnormal in Parkinsonian patients; increased duration, diminished synchronization of motor units, and a tendency for coactivation of agonist and antagonist muscles and for action tremor were observed. Transport time of elbow movement was prolonged, particularly in a choice reaction‐time situation. Rapid, passive displacements of the forearm combined with excitability measurements of hindlimb motoneurons in monkeys revealed the existence of a transcortical loop that may contribute to increased muscle tone in Parkinsonian patients.

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