Teres major

Origin	Posterior aspect of the inferior angle of the scapula
Insertion	Medial lip of the intertubercular sulcus of the humerus
Action(s)	The Teres major is a medial rotator and adductor of the humerus and assists the Latissimus dorsi in drawing the previously raised humerus downward and backward. It also helps stabilize the humeral head in the glenoid cavity.
Nerve Supply	Lower subscapular nerve (segmental levels C5 and C6)
Arterial Supply	Subscapular and circumflex scapular arteries
Physical Exam	Enter physical examination maneuvers for muscle
Clinical Importance	Enter clinical importance of muscle
Disease States	Enter links to pages where muscle involved
Discussion	Relations: The tendon, at its insertion, lies behind that of the Latissimus dorsi, from which it is separated by a bursa, the two tendons being, however, united along their lower borders for a short distance. Together with teres minor muscle, teres major muscle forms the axillary space, through which several important arteries and veins pass. The teres major muscle is innervated by the lower subscapular nerve of the brachial plexus.