This video reviews the anatomy of the shoulder, ... the acromion, the acromioclavicular joint, the ... The infraspinatus and teres minor muscles each contribute to external rotation of the arm.

But it’s actually two joints (the acromioclavicular joint and the glenohumeral joint). Your shoulder joins with your upper-arm bone (humerus), shoulder blade (scapula), and collarbone (clavicle).

There are two primary joints in the shoulder: the glenohumeral joint and the acromioclavicular joint. ... causing pain in the shoulder. A biceps tenodesis can help repair the tendon.

The shoulder plays a crucial role in many functions, including lifting, rotating, and moving the arm. Learn about shoulder anatomy and possible injuries here. Medical News Today ...