The collarbone forms the sternoclavicular joint with the sternum (breastbone) at one end and the acromioclavicular joint with the acromion (part of the shoulder blade) at the other end.

Ball and socket joint. Articulating bones are humerus and scapula (the clavicle is not part of the shoulder joint). Allows a great range of movement in all directions. Many muscles are used to ...

With passive range of motion, there is motion through the humerus distal to where the shoulder joint would be expected ... The distal clavicle and scapula appear intact.