Rotator Cuff Injury

Pain & Injury on December 12th, 2010 No Comments

Injury to the Rotator Cuff is very common and the two muscles that are typically injured include the Supraspinatus and the Infraspinatus. The Supraspinatus plays a strong role in stabilizing the head of the humerus into the glenoid fossa and is most commonly the one in need of surgical repair. While the Infraspinatus eccentrically check rains the powerful circumduction movements associated with throwing activities. The glenohumeral joint lacks ligamentous and capsular support and therefore relies on the same small Rotator Cuff muscles that move the joint to also stabilize the joint. This paradox is one important component related to the increased vulnerability of the shoulder joint. In addition the glenohumeral joint is one of the most freely moveable joints with the greatest range of motion. There are some very large and strong muscles like the Pectoralis Major, Latissimus Dorsi, Teres Major that generate powerful and multidirectional movements that must be controlled by the smaller Rotator Cuff – Supraspinatus, Infraspinatus, Teres Minor and Subscapularis. In the case of a compromised Supraspinatus check out the Latissimus Dorsi, Teres Major and Subscapularis for adaptive shortening and spasm, this tension can pull the head of the humerus out of normal anatomical alignment causing greater stress on the Supraspinatus and the articulating surfaces.

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