The Morphological Structure of the Subscapularis Muscle in a Male's Anterior View

Description

Occupying the costal (anterior) surface of the scapula, the subscapularis fans broadly from the subscapular fossa toward its tendon on the lesser tubercle of the humerus, forming the anterior wall of the rotator cuff. Superiorly it lies deep to the coracoid process and subcoracoid space, while inferior fibers descend toward the inferior angle of the scapula. Laterally, the tendon courses toward the intertubercular sulcus, separated from the glenohumeral joint capsule by the subscapularis bursa in the region of the anterior joint recess. Big footprint. Anterior views like this matter when you need to understand internal rotation strength and anterior glenohumeral stability. Subscapularis tears, often in the upper tendon, can present with weakness on the lift-off or belly-press tests and may coexist with pathology of the long head of the biceps as it enters the bicipital groove, a relationship that drives surgical decision-making during arthroscopy or open repair. The muscle’s broad origin also explains why medial scapular pain can coexist with anterior shoulder symptoms, and why subcoracoid impingement becomes relevant when the coracohumeral interval narrows. Use this illustration for teaching rotator cuff anatomy in gross anatomy, kinesiology, or orthopedic modules where students must distinguish subscapularis from supraspinatus, infraspinatus, and teres minor by surface and insertion rather than by name alone. It also fits well in surgical education materials on anterior shoulder approaches, subscapularis takedown in shoulder arthroplasty, and postoperative tendon healing discussions in sports medicine and radiology reports. Anatomical accuracy verified by SciePro's Medical Advisory Board.