Reports

Telemetered electromyography of forelimb muscle chains in gibbons (Hylobates lar)

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Science  09 May 1980:
Vol. 208, Issue 4444, pp. 617-619
DOI: 10.1126/science.7367886

Abstract

Electromyographic studies of brachiation in the gibbon controvert deductions, based on dissection, about the purported functions of muscle chains in the hylobatid forelimb. Neither force conduction distally along the components of the chains nor simultaneity of muscular contraction occurs in brachiation. Rather, the unique structure of the forelimb is probably the result of evolved changes in the short head of biceps brachii to enhance its role as a forearm flexor.