College of Massage Therapists of British Columbia (CMTBC) Practice Exam

Which special test commonly yields a positive result when a dimple appears inferior to the acromion?

1. Speed's Test

2. Yergason's Test

3. Sulcus Sign

4. Active range of motion test

The correct answer is: Sulcus Sign

The Sulcus Sign is a special test used to assess for inferior glenohumeral instability. When performing this test, a healthcare provider pulls downward on the arm while stabilizing the shoulder. A positive result is indicated by the presence of a noticeable dimple or indentation inferior to the acromion, which suggests that the humeral head is moving excessively downward in relation to the glenoid fossa. This movement indicates a potential instability or laxity in the structures that normally support the shoulder joint. In contrast, the other tests listed are designed to assess different conditions or joint functions. Speed's Test evaluates biceps tendon stability and impingement, while Yergason's Test assesses the integrity of the biceps tendon and the transverse humeral ligament. The Active Range of Motion Test is not a specific test for instability but rather a general assessment of movement capabilities and may not specifically address the instability indicated by the dimple seen with a positive Sulcus Sign.