Page:Structure and functions of the body; a hand-book of anatomy and physiology for nurses and others desiring a practical knowledge of the subject (IA structurefunctio00fiskrich).pdf/192

 forearm and thence along its ulnar border to the palm of the hand, where it divides into the deep branch and the superficial palmar arch which supplies the four digital arteries.

From the axillary artery branches go to the chest wall and shoulder, the most important being the two circumflex arteries to the deltoid. The brachial has only two branches of any importance, the superior and ''inferior profunda'', both on the upper arm, of course.

In case of hemorrhage compression can frequently be applied with the fingers where the subclavian crosses the rib or in the axilla, where the artery can be pressed up against the humerus.

Nerves.—The nerve supply of the shoulder comes chiefly from the anterior and posterior thoracic, the suprascapular, and the circumflex, these last going to the deltoid. The biceps is supplied by the musculo-*cutaneous, the triceps by the musculo-spiral, and the brachialis anticus by both. Most of the flexor and pronator muscles are supplied by the median, while the posterior interosseous and the musculo-spiral nerves go to the extensors and supinators. The ulnar nerve supplies the hand largely.