An Inquiry Into the Comparative Forces of the Extensor And Flexor Muscles Conne
An Inquiry Into the Comparative Forces of the Extensor And Flexor Muscles Conne
Julius Jeffreys
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' The flexors of the elbow are probably, in most persons, the more powerful muscles. Although the Triceps extensor cubiti, may be a muscle perhaps equal in power to the Biceps and Bra- chialis internus together, yet, when it is con- sidered, how many of the muscles of the fore- arm take their origin from the condyles of the humerus, and that all these act as flexors, there can hardly remain a doubt, that the flexors of this joint, are more powerful than the extensors. 37 The mechanism of the wr...ist, differing from that of most joints, it is scarcely correct to con- sider the muscles which move it backwards or forwards, as either solely extensors or flexors. Since it moves nearly in an equal degree both ways; when the hand is in an extreme position backwards, the muscles which bring it forwards, first act as extensors, and then as flexors ; and vice versa, when the hand is bent forwards, the muscles which carry it back, must first act as extensors, and then as flexors. It has, however, been the custom of anatomists to call those mus- cles, which carry the hand back, the extensors, and those which bring it forwards, the flexors of the wrist.
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