MuscleShoulder — posterior

Teres major

Latin: M. teres major

Location: Shoulder

View the teres major in 3D

Origin

Posterior surface of the inferior angle of the scapula.

Insertion

Crest of the lesser tubercle (medial lip of the intertubercular groove) of the humerus.

Action

Medially rotates and adducts the arm — the latissimus dorsi's little helper.

Nerve supply

Lower subscapular nerve (C5–C6).

Blood supply

Subscapular and circumflex scapular arteries.

Clinical relevance

Forms the inferior border of the quadrangular and triangular spaces (teres minor forms the superior border); with latissimus dorsi it is used in tendon transfers for shoulder reconstruction.

Educational anatomy reference, not medical advice. About this content.