Teres Major
– See: Abductors of the Shoulder : Origin: dorsal surface of inferior angle of the scapula on the lower 1/3 of scapular axillary border; Insertion: medial lip of bicipital groove of humerus; medial to latissimus dorsi tendon; Action: adducts and medially rotates humerus at the shoulder; extends the shoulder joint; Reversed origin insertion action: … Read more