The outer end of the collarbone, near the front and top of the shoulder, articulates (makes a joint) with a bony projection from the shoulderblade. The bony projection is called the acromion process.
The clavicular part meets the acromion part, forming the “acromioclavicular, or AC, joint.
Curiously, these bones butt together with little efficient “fitting” surfaces, and are held together by ligaments surrounding and “cementing” their connection.
On the plus side, this joint, one of several in the shoulder complex, contributes to the range of motion of the shoulder. But on the downside, this joint is particularly vulnerable to injury, including partial misalignment or complete dislocation.
In my practice, patients with shoulder pain often have AC joint problems. The joint may be jammed, or exhibiting separation stress. I make gentle, precise adjustments with the Activator instrument to bring relief.
