Subscapularis Muscle

**Semantic type:** Anatomical Structure

**Definition:** One of four rotator cuff muscles that form a musculotendinous cuff around the glenohumeral joint, which provides muscular support to the shoulder. It originates on the subscapular fossa with insertion onto the lesser tubercle of the humerus, and functions to medially rotate the humerus.

**Synonyms:** - SUBSCAPULARIS MUSCLE