The teres major is a thick, rounded muscle of the shoulder joint. It is a thick but somewhat flattened muscle.
Supraspinatus, Infraspinatus, Subscapularis, and Teres Minor together This Four Muscle work as rotatory to the Humerus. So, also known as Rotator Cuff.
teres major ORIGIN:
teres major Originates from the posterior surface of the scapula at the inferior angle.
teres major INSERTION:
teres major inserted at the intertubercular groove of the humerus, tendon fused with the tendon of latissimus dorsi.
teres major ACTION:
- teres major posteromedially extends, medially rotates, & adducts arm.
- teres major synergist of latissimus dorsi.
teres major NERVE SUPPLY:
The lower scapular nerve.
