Axillary space

Axillary space
Axillary space, between the teres major and teres minor muscles, and split into a medial and lateral part by the triceps brachii muscle.
Details
Latin	spatium axillare
*Anatomical terminology* [edit on Wikidata]

The axillary space is an anatomic space,^[1] bounded by teres major muscle, teres minor muscle and humerus. It is split into two parts by the long head of the triceps brachii into a lateral quadrangular and a medial triangular part. The lateral part is known as the quadrangular space and the medial, the triangular space.

Structure

This space is quadrangular, and therefore also called the quadrangular space. The axillary nerve, posterior humeral circumflex artery and posterior humeral circumflex vein pass through it.

This space is triangular, and is therefore also called the triangular space. The scapular circumflex artery and scapular circumflex vein pass through it.

↑ Scott L. Spear; Shawna C. Willey (2006). Surgery of the breast: principles and art. Lippincott Williams & Wilkins. pp. 131–. ISBN 978-0-7817-4756-1. Retrieved 17 July 2010.

deltoid rotator cuff supraspinatus infraspinatus teres minor subscapularis teres major

fascia:	deltoid fascia supraspinous fascia infraspinous fascia

anterior	coracobrachialis biceps brachialis

posterior	triceps brachii anconeus articularis cubiti

fascia	axillary sheath axillary fascia brachial fascia intermuscular septa lateral medial

other	spaces quadrangular space triangular space triangular interval

superficial:	pronator teres palmaris longus flexor carpi radialis flexor carpi ulnaris flexor digitorum superficialis

deep:	pronator quadratus flexor digitorum profundus flexor pollicis longus

superficial:	mobile wad brachioradialis extensor carpi radialis longus and brevis extensor digitorum extensor digiti minimi extensor carpi ulnaris

deep:	supinator anatomical snuff box abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis

other

lateral volar

medial volar

intermediate

posterior:	extensor retinaculum extensor expansion

anterior:	flexor retinaculum palmar aponeurosis

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