Latin spatium axillare | ||
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The axillary space is an anatomic space, 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.
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Lateral axillary space
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.
Medial axillary space
This space is triangular, and is therefore also called the triangular space. The scapular circumflex artery and scapular circumflex vein pass through it.
References
Axillary space Wikipedia(Text) CC BY-SA