. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE BRACHIAL PLEXUS. 878, from the radial, and afterwards gives off the internal dorsal collateral of the small digit, and external of the auricularis. The palmar branch does not extend to all the digits as in the Dog. Passing within the pisiform bone, it divides into several filaments; some of these are distributed to the muscles of the small digit and thumb; another follows the external border of the small digit, and con- stitutes its external palri)ar collateral; one of the longest is lodged in the first intermetacar
. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE BRACHIAL PLEXUS. 878, from the radial, and afterwards gives off the internal dorsal collateral of the small digit, and external of the auricularis. The palmar branch does not extend to all the digits as in the Dog. Passing within the pisiform bone, it divides into several filaments; some of these are distributed to the muscles of the small digit and thumb; another follows the external border of the small digit, and con- stitutes its external palri)ar collateral; one of the longest is lodged in the first intermetacarpal space, giving a fila- _Zi?i *'^2- ment to the large cushion of the paw, and the internal palmar collaterals of the small digit and external of the annularis. Comparison of the Brachial Plexus in Man with THAT of Animals. The brachial plexus of Man, like that of the Dog, is constituted by the anterior branches of the four last cervi- cal, and the last dorsal nerves. The few variations ob- served are very slight, and are to be ascribed to the differ- ence in form of the regions to which the nerves are dis- tributed. The shoulder of Man being short, and the other seg- ments of the limb long and well detached, the branches of the brachial plexus can be divided into collateral and terminal. Tlie coZiafem? branches are: 1. The subclavian branch, whicii is not found in our animals, they having no sub- clavian muscle. 2. The nerve of the levator anguli tcapulx. 3. Nerve of the rhomhovhus. 4. Supra-scapular nerve. 5. The serratus mngnus (posterior ihnracic) nerve. 6. Subscapular, which is divided at its origin into two branches as in the Sheep and Cainivora. 7. The nerves of the great and small pectorals (anterior thoracic). The accessory nerve of the internal cutaneous, reprpsented in quadrupeds by the subcutaneous thoracic. 9. The nerve of the latissimus dor si. 10. The nerve of the teres major. The terminal branches go to the arm, forearm, and hand. They iire: 1. The internal cwt
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