In the AC Shear test, what does a positive result indicate?

A positive result in the AC Shear test indicates pain or excessive movement in the acromioclavicular (AC) joint. This test is designed to assess the integrity of the AC joint and its associated structures. When performing the test, the clinician applies compression across the AC joint. A positive outcome suggests that there may be an injury or dysfunction, potentially related to AC joint sprains or osteoarthritis.

The significance of this result lies in the relationship between symptoms and the mechanics of the joint. If the AC joint is compromised, it may exhibit abnormal movement or elicit pain when subjected to force, confirming that the joint may not be functioning properly. This test is particularly relevant for evaluating shoulder injuries, especially in cases involving overhead athletes or those with a history of trauma to the shoulder.

While other options mention conditions that affect the shoulder, they do not directly relate to what the AC Shear test specifically assesses. Therefore, a positive result primarily provides insight into the state of the acromioclavicular joint and any pathological changes present there.