. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . aises the hand, draws itforward toward the radial margin of the forearm, andretains it in the same plane. In the Penguin thismuscle is extremely feeble, and the tendon is lost inthat of the tensor plicce alaris. 74. The extensor digitorum communis ^ is a smallermuscle than the one just described, and arises from the Le long supinateur. Gervais et Alix, p. 26.„ „ „ Alix, p. 408. Extensor carpi radialis. Selenka, p. 129, No. 58; Carlsson, p. carpi radialis Irevis. Selenka, p. 13
. The myology of the raven (Corvus corax sinuatus.) A guide to the study of the muscular system in birds . aises the hand, draws itforward toward the radial margin of the forearm, andretains it in the same plane. In the Penguin thismuscle is extremely feeble, and the tendon is lost inthat of the tensor plicce alaris. 74. The extensor digitorum communis ^ is a smallermuscle than the one just described, and arises from the Le long supinateur. Gervais et Alix, p. 26.„ „ „ Alix, p. 408. Extensor carpi radialis. Selenka, p. 129, No. 58; Carlsson, p. carpi radialis Irevis. Selenka, p. 130, No. 59a. ^ This is 92. M. extensor digitorum communis of Gadow (BronnsKlassen des Thier-Eeichs, vi. Band, p. 282) and of Selenka (loc. cit.,p. 131, No. 61). 126 THE MYOLOGY OF THE RAVEN. liiimerus jminciliately below the tul)ercle of the externalcondyle. It soon forms a, spindle-shaped muscle whichblends with the supinator hrevis as it passes it, andterminates in a strong, cord-like, glistening tendon atabout the middle of the forearm. This tendon passes Eixtan^arOSS is mjeXa>- vC^upuuitbi. Fig. 37. — Radial aspect of leftulna and radius of anadult Haven, designedto show origin andinsertion of musclesof the forearm. Life-size, by the author,IVom the siiecimen. through a groove in common with the tendons of theJiexoT carpi radialis and the long extensor on thepalmar side of the distal extremity of the ulna, and inpassing down the front of the hand, first throws off asmall tendon which is inserted on the outer side of the THE MUSCLES OF THE UPPER EXTREMITY. 127 base of the poUex digit; after wliicli, it continues downthe anterior aspect of the shaft of the carpo-metacarpusin a well-marked and somewhat oblique groove intendedfor it, as far as the upper end of the proximal phalanxof the middle digit. Here it lies beneath the tendonsof the other muscles, when turning to the median linethrough a fibro-cartilaginous pulley intended for it, it isfinally inserted at a mid-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectmuscles, bookyear1890
