Medically reviewed by Mallory Christopherson, DC Key Takeaways The shoulder joint is made up of four joints that work ...

Shoulder injuries and different types of arthritis may cause acromioclavicular (AC) joint pain. The AC joint in the shoulder connects the collarbone to part of the shoulder blade. One of the AC ...

Pain in the sternoclavicular joint can result from inflammation, injury, or tissue degeneration. Treatment can include physical therapy, medication, and sometimes surgery. The sternoclavicular joint ...

The scapula has its own set of joint actions: The shoulder girdle has a set of joint actions specific to motion of the scapula. Although this may seem like just another set of confusing terms to ...