Shoulder Basics

Bones of the Shoulder

The shoulder is the most complex joint in the body. It is made up of three bones, the scapula (shoulder blade), the humerus (upper arm) and the clavicle (collar bone). There are four articulations, the AC (acromioclavicular) joint, SC (sternoclavicular) joint, GH (glenohumeral) joint and the scapulo-thoracic articulation. Finally, there are 13 muscles including the…

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Knee joint anatomy

Tendons are the structures that attach our muscles to our bones. When a muscle shortens, or flexes, it pulls on a tendon. The tendon moves the bone it is attached to, creating movement in our joints. When a tendon ruptures, the result is weakness of the joint that it is meant to move. In some…

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