Where do you feel AC joint pain?
Where do you feel AC joint pain?
AC joint inflammation causes pain on the top of the shoulder, at the point where the collarbone (clavicle) meets the highest point of the shoulder blade (acromion). Pain may radiate to the lower part of the side of the neck or ear.
Is acromioclavicular joint multiaxial?
The acromioclavicular (AC) joint is the articulation between the two bones of pectoral girdle; the clavicle and scapula. It is a multiaxial joint, allowing the movements in the three degrees of freedom; protraction-retraction, elevation-depression, and axial rotation.
What movement does acromioclavicular joint allow?
The AC joint is a plane type synovial joint, which under normal physiological conditions allows only gliding movement. As it attaches the scapula to the thorax, it allows an additional range of motion to the scapula and assists in arm movement such as shoulder abduction and flexion.
What is acromioclavicular joint arthritis?
AC Joint Arthosis. The acromioclavicular or AC joint is the site where the shoulder girdle, which includes the arm and the shoulder blade, attaches to the axial skeleton through the clavicle. This acromioclavicular joint is a common place of injury and can be a common source of shoulder pain. A variety of sports activities can lead to injuries,…
Is there a connection between the clavicle and the acromion?
This connection between the clavicle and the acromion is not a typical joint such as the knee, hip or ankle. Although it is often described as developing osteoarthritis, I prefer to describe it as joint arthrosis as it is not a true synovial joint.
What causes acromioclavicular degeneration?
Degeneration of the acromioclavicular joint usually occurs because of an injury that one may have had when they were young. The optimal position of the clavicle on the acromion is disrupted because of a previous injury or shoulder separation. Over time, because the two bones are not positioned exactly right, it wears out and develops arthrosis.
How do you test for acromioclavicular joint pain?
AC joint may be tender to palpation. Pain elicited to the deltoid area by the motion of forward flexion to 90° with horizontal adduction ( cross-over test) or straight-ahead pushing (as in the bench press exercise). The most sensitive tests for ACJ pain are acromioclavicular point tenderness and the Paxinos test.
