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

What is indicated when the supraspinatus muscle frictions against the acromion?

1. Rotator cuff injury

2. Subacromial bursitis

3. Shoulder dislocation

4. Frozen shoulder

The correct answer is: Subacromial bursitis

The indication that the supraspinatus muscle is fricting against the acromion suggests an issue related to the subacromial space and the structures within it, particularly the subacromial bursa. When the supraspinatus muscle becomes irritated or inflamed, it can cause pain and discomfort as it moves under the acromion. This friction often leads to a condition known as subacromial bursitis. Subacromial bursitis occurs when the bursa, a small fluid-filled sac that helps reduce friction between tissues, becomes inflamed. This inflammation can be a direct result of repetitive overhead activities, poor posture, or strain on the shoulder joint, which can all lead to increased friction between the supraspinatus tendon and the acromion. As the tendon rubs against the acromion, pain, swelling, and restricted movement may be experienced, indicating the presence of bursitis rather than a more severe injury or condition. In contrast, while rotator cuff injuries may involve the supraspinatus, they typically manifest as stronger, more acute pain and often have additional signs such as weakness or loss of function. Shoulder dislocation and frozen shoulder, on the other hand, refer to distinct conditions