Among the several joints of the shoulder complex is an articulation at the outer end of the collarbone, the end furthest away from the center of your chest, called the AC, or acromioclavicular, joint.
It is a common site of injury, partly because it consists of two bones that essentially just “butt together” and their ends, and are fastened together by surrounding ligaments. It is a less efficient joint than many others in the body, and is vulnerable to injury.
In my practice, an aberrant AC joint is a common cause of patients’ shoulder pain; I have very precise adjustments which I make with my Activator instrument that help.
