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Subscapularis | ARM MOVERS | Rotator Cuff

              The subscapularis is a large triangular muscle.  Supraspinatus ,  Infraspinatus ,  Subscapularis , and  Teres Minor  together This Four Muscle work as rotatory to the Humerus. So, also known as  Rotator Cuff. ORIGIN: The subscapularis is originated from subscapular fossa of the scapula. INSERTION: The subscapularis is inserted at lesser tubercle of the humerus. ACTION: The subscapularis is chief medial rotator of the humerus, assisted by pectoralis major . The subscapularis is helped to hold the head of a humerus in glenoid cavity, stabilizes the shoulder. NERVE SUPPLY: The subscapularis is supplied by the Subcapular nerve.