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Axillary artery

Other Terms: Axillary part of subclavian artery, Arteria axillaris, Artère axillaire

Description

The axillary artery is the continuation of the subclavian. It commences at the lower border of the first rib, passes downward and lateral through the apex, beneath the pectoral muscles. It then runs along the medial border of the coracobrachialis muscle to the lower border of the tendon of the teres major. Here, it becomes the brachial artery. It is accompanied by the axillary vein and the nerves of the brachial plexus. The course of the vessel through the axilla varies with the relation of the arm to the body. With the arm abducted at a right angle with the body, the artery takes an almost straight course. It passes downward along the medial side of the coracoid process and the coracobrachialis muscle at about the junction of the anterior and middle thirds of the axilla. With the arm upward, the artery curves with its concavity directed toward the shoulder. With the arm at the side, the artery curves with its convexity directed toward the shoulder. The first portion of the axillary artery extends from the lower border of the first rib to the upper border of the pectoralis minor. The second portion, the shortest, lies behind the pectoralis minor. The third portion, the longest, extends from the lower border of the pectoralis minor to the lower border of the tendon of the teres major

Latin

Arteria axillaris

French

Artère axillaire

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