Shoulder Abduction

Poor abduction should not be treated as only an isolated shoulder joint problem. Shoulder abduction depends on coordinated motion among the humerus, scapula, and rib cage. A practical assessment sequence begins with the rib cage, then the scapula, then the humerus. Each step in a shoulder abduction restoration sequence should be tested and retested. Persistent limitation after thoracic and scapular restoration may require more direct humeral or rotator cuff attention.