Origin | Subscapular fossa |
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Insertion | Lesser tubercle of humerus |
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Action(s) | The Subscapularis rotates the head of the humerus medially (internal rotation); when the arm is raised, it draws the humerus forward and downward. It is a powerful defense to the front of the shoulder-joint, preventing displacement of the head of the humerus. |
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Nerve Supply | Upper subscapular nerve, lower subscapular nerve (C5, C6) |
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Arterial Supply | Transverse cervical artery, subscapular artery |
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Physical Exam | Injury Diagnosis: The Bear Hug test (internal rotation while palm is held on opposite shoulder and elbow is held in a position of maximal anterior translation) for Subscapularis muscle tears has high sensitivity. Positive Bear-Hug and Belly Press tests indicate significant tearing of subscapularis. |
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Clinical Importance | Enter clinical importance of muscle |
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Disease States | Enter links to pages where muscle involved |
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Discussion | Relations: The tendon of the muscle is separated from the neck of the scapula by a large bursa, which communicates with the cavity of the shoulder-joint through an aperture in the capsule. |
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