Anatomical and Biomechanical Review of Shoulder Region Muscles With Special Reference to Rotator Cuff

Background: The shoulder joint is the most mobile joint of the human body, allowing a wide range of movements. This mobility is mainly supported by a complex arrangement of muscles, especially the rotator cuff muscles. These muscles play a key role in maintaining joint stability while permitting dynamic movements. Understanding their anatomical structure and biomechanical functions is essential for clinical diagnosis and management of shoulder disorders. Aim: To study the anatomical structure and biomechanical functions of shoulder region muscles with special reference to the rotator cuff. Objectives: To describe the anatomy of shoulder region muscles. To analyze the components of rotator cuff muscles. To evaluate the biomechanical role of rotator cuff in shoulder movements. To understand the stabilizing function of rotator cuff muscles. Materials and Methods: This study is a conceptual and literature-based review. Data were collected from standard anatomical textbooks, peer-reviewed journals, and classical Ayurvedic texts. The anatomical details of shoulder muscles and their biomechanical roles were analyzed and correlated with Ayurvedic concepts wherever applicable. Results: The rotator cuff consists of four muscles—Supraspinatus, Infraspinatus, Teres Minor, and Subscapularis—which collectively stabilize the glenohumeral joint. These muscles maintain the humeral head within the glenoid cavity during movements such as abduction, rotation, and flexion. Biomechanically, they function as dynamic stabilizers, preventing dislocation and ensuring smooth joint motion. Dysfunction or injury to these muscles leads to conditions like rotator cuff tears, impingement syndrome, and reduced range of motion. Discussion: The coordinated action of shoulder muscles ensures both mobility and stability, which is a unique feature of the shoulder joint. Any disturbance in these factors can result in pain, stiffness, and functional impairment of the shoulder joint. Conclusion: The rotator cuff muscles are vital for the functional integrity of the shoulder joint. A thorough understanding of their anatomy and biomechanics is crucial for effective clinical evaluation and management of shoulder pathologies.