. The anatomy of the domestic animals . Veterinary anatomy. 818 NERVOUS SYSTEM OF THE HORSE the tendon of the ulnaris lateraHs with the lateral branch of the median nerve to form the lateral volar nerve. Median Nerve The median nerve (Figs. 566, 567, 572, 652, 653) derives its fibers chiefly from the eighth cervical and first thoracic roots of the brachial plexus. It is usually the largest branch, and it accompanies the chief arterial trunks to the distal part of the limb. It descends over the medial face of the brachial artery, which it crosses obliquely, and continues down the arm in front o
. The anatomy of the domestic animals . Veterinary anatomy. 818 NERVOUS SYSTEM OF THE HORSE the tendon of the ulnaris lateraHs with the lateral branch of the median nerve to form the lateral volar nerve. Median Nerve The median nerve (Figs. 566, 567, 572, 652, 653) derives its fibers chiefly from the eighth cervical and first thoracic roots of the brachial plexus. It is usually the largest branch, and it accompanies the chief arterial trunks to the distal part of the limb. It descends over the medial face of the brachial artery, which it crosses obliquely, and continues down the arm in front of the artery. Near its origin it is Medial metacarpal vein Volar nerve Digital artery Dorsal digital branch Volar digital branch Corollary plexus. Distal end of lateral small meta- carpal bone Large metacarpal bone Suspensory ligament — Superficial flexor tendon Posterior annular ligament of fetlock Extensor branch of suspensory lifinment Oblique or middle distal sisamoidean ligament Volar ligament of pastern joint Proximal annular ligament of digit Deep flexor tendon Dibtal annular ligament of digit Fig. 054.—Dissection of Distal Part of Right Fore Limb op Horse; Volar Surface. 1, Cartilage of third phalanx; 3, 3, 4, ligaments from first phalanx to distal sesamoid, bulb of heel and cartilage of third phalanx. (After Schmaltz, Atlas d. Anat. d. Pferdes.) joined by a large branch with the musculo-cutaneous nerve, thus forming a loop in which the artery appears to be suspended. Near the elbow it usually crosses obliquely over the median artery and lies behind it on the medial ligament. Below the joint it again crosses the artery and lies behind the radius and the lower part of the long medial ligament. At the elbow the nerve is covered by the posterior superficial pectoral muscle and is crossed by the large oblique connection between the cephalic and brachial veins. The variable and often plexiform venous arrangement renders approach to the nerve here undesirable. It can be r
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