. The comparative anatomy of the domesticated animals. Veterinary anatomy. 270 TEE MUSCLES. Fig. DIFFEKENTIAL CHARACTERS OP THE MPSCLES OP THE FORE- AKM IN OTHER THAN SOLIPED ANIMALS. Ei'MiNANTS.—In the Ox and Sheep, the anterior ex- tensor of the metacarpus comports itself as in Solipeds. The oblique extensor of the metacarpus of the same region terminates inside the upper extremity of the prin- cipal metacarpus. The anterior extensor of the phalanges offers a remark- able disposition. This muscle is divided throughout its length into two parallel portions : an external, ^Yhich forms th
. The comparative anatomy of the domesticated animals. Veterinary anatomy. 270 TEE MUSCLES. Fig. DIFFEKENTIAL CHARACTERS OP THE MPSCLES OP THE FORE- AKM IN OTHER THAN SOLIPED ANIMALS. Ei'MiNANTS.—In the Ox and Sheep, the anterior ex- tensor of the metacarpus comports itself as in Solipeds. The oblique extensor of the metacarpus of the same region terminates inside the upper extremity of the prin- cipal metacarpus. The anterior extensor of the phalanges offers a remark- able disposition. This muscle is divided throughout its length into two parallel portions : an external, ^Yhich forms the common extensor of the digits; and an internal, the proper extensor of the internal digit. a. The fleshy body of the common extensor (fig. 123, 3) is a little more voluminous than that of the second muscle. Its tendon (3') commences near the inferior third of the radius, passes over the knee, the metacarpal bone, and the metacarpo-phalangeal articulation. On arriving at the origin of the digits it bifurcates, and each of its branches goes to be inserted into the pyramidal eminence of the third phalanx (3"). This muscle, in extending the digits, brings them togefiier, as M. Lecoq has judiciously re- marked. 6. The proper extensor of the internal digit ( fig. 123, 4) much resembles the common extensor in volume, form, and direction. Its tendon (4') passes, with tliat termi- nating the latter muscle, into one of the inferior grooves of the radius and over the capsular ligament of the carpus, where the two cords are enveloped by a common synovial sheath. Arrived at the metacarpo-phalangeal articulation, tills tendon is placed at the excentric side of the internal digit, and descends, gradually expanding, until it reaches the inferior extremity of this bone ; towards the middle of the first phalanx, it receives from the suspensory ligament of the fetlock two constraining bands similar to those which, in Solipeds, bind the anterior extensor of the pha- langes on the same bon
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