The intrinsic muscles of the scapula include the muscles of the rotator cuff- the subscapularis, teres minor, supraspinatus, and infraspinatus.
Gliding now medially shows the insertion of the subscapularis tendon.
Full-thickness tendon tears did not affect the pennation angle of the subscapularis or teres minor muscles.
The joint capsule is sewed to the detached glenoid labrum, without duplication of the subscapularis tendon.
Hence, restricted external rotation can encourage adaptive shortening and thickening of the internal rotators of the shoulder principally the teres major and subscapularis.
They are divided into the "external" and the "internal subscapularis".
These ridges are formed by intramuscular tendons of the subscapularis muscle.
The cinching action can be aided by the subscapularis muscle, though its relaxation is required to accomplish the arms initial outward rotation.
