The axillary space is an anatomic space

Spatium

A spatium is a space in anatomy. They are often landmarks to find other important structures. Examples include:*Axillary space*Retropharyngeal space*Retropubic space*Epidural space*Subdural space*Subarachnoid space*Retroperitoneal space...

, bounded by teres major muscle

Teres major muscle

The teres major muscle is a muscle of the upper limb and one of six scapulohumeral muscles. It is a thick but somewhat flattened muscle, innervated by the lower subscapular nerve .-Origin and insertion:...

, teres minor muscle

Teres minor muscle

The teres minor is a narrow, elongated muscle of the rotator cuff.-Origin:It arises from the dorsal surface of the axillary border of the scapula for the upper two-thirds of its extent, and from two aponeurotic laminæ, one of which separates it from the infraspinatus muscle, the other from the...

 and humerus

Humerus

The humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow....

. Furthermore, it is split into two parts, the lateral and medial, by the long head of triceps brachii muscle.

Medial axillary space

This space is triangular, and is therefore also called the triangular space

Triangular space

The triangular space is an axillary space....

. Scapular circumflex artery and scapular circumflex vein pass through it.

Lateral axillary space

This space is quadrangular, and therefore also called the quadrangular space

Quadrangular space

The quadrangular space is an axillary space in the arm. This is a clinically important anatomic space in the arm. In the quadrangular space, the axillary nerve and posterior circumflex humeral artery can be compressed or damaged in the space due to space occupying lesions or disruption in the...

. Nervus axillaris, posterior humeral circumflex artery

Posterior humeral circumflex artery

The posterior humeral circumflex artery arises from the axillary artery at the lower border of the subscapularis, and runs posteriorally with the axillary nerve through the quadrangular space.It winds around the neck of the humerus and is distributed to the Deltoid muscle and shoulder-joint,...

 and posterior humeral circumflex vein pass through it.

External links

• http://anatomy.med.umich.edu/musculoskeletal_system/axilla_ans.html