. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE BRACHIAL PLEXUS. 769 passes backwards, and is oxpondcd in the skin of the back, and inner part of the fore-arm. 2. The musculo-cutaneous or perforans casserii, â whose disposition is analogous to that of Carnivora. 3. The axillary nerve, regarding which there is nothing to say. 4. The radial nerve (mnsculo-si)iral) passes as in animals, lies in the twisted furrow of the humerus, gives off an internal and external cutaneous branch, and reaches the antero-external part of the arm, in the space between the anterior bra
. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE BRACHIAL PLEXUS. 769 passes backwards, and is oxpondcd in the skin of the back, and inner part of the fore-arm. 2. The musculo-cutaneous or perforans casserii, â whose disposition is analogous to that of Carnivora. 3. The axillary nerve, regarding which there is nothing to say. 4. The radial nerve (mnsculo-si)iral) passes as in animals, lies in the twisted furrow of the humerus, gives off an internal and external cutaneous branch, and reaches the antero-external part of the arm, in the space between the anterior brachial and long supinator, where it terminates by two branches. The anterior of these reaches the back of the hand, and gives off three ramuscules there, which are dis- tributed as follows: the first forms the external dorsal collateral of the thumb; the second bifur- cates, and constitutes the internal dorsal coUateial of the thumb and external collateral of the index; lastly, the third supplies the internal collateral uf the index and external of the medius. This branch always aua&tomoses with the dorsal branch of the ulnar. The posterior branch, motor, is expended in the muscles on the posterior and external aspect of the fore-arm. 5. The median nerve commences by two branches: one arises in common with the musculo-cutaneous or anterior brachial, and corresjionds to the anasto- mosis found around the axillary artery of the Horse ; the other is detached from the trunk common to the ulnar and internal cutaneous. The median runs along the biceps, passes in front of the elbow, and lies beneath the annular ligament of the carpus, where it terminates in furnishing : 1, A filament to the short abductor of the thmnb; 2, Palmar ramus- cules to the thumb, index, and medius, and external border of the annularis. Tliis disposition of the medius. therefore, much resembles that of the Cat. 6. The tdnar nerve passes along the inner border of the arm and fore-arm, and divides, a little
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