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

Which ligament stabilizes the long head of the biceps brachii at the glenohumeral joint?

1. Glenoid labrum

2. Coracohumeral ligament

3. Superior glenohumeral ligament

4. Transverse humeral ligament

The correct answer is: Coracohumeral ligament

The transverse humeral ligament plays a vital role in stabilizing the long head of the biceps brachii at the glenohumeral joint. This ligament spans from the greater tubercle to the lesser tubercle of the humerus, creating a passage for the long head of the biceps tendon. It effectively secures the tendon in the bicipital groove, preventing it from dislocating or subluxating during shoulder movements. Other ligaments and structures in the shoulder jointly contribute to stability, but the transverse humeral ligament is specifically tasked with maintaining the position of the long head of the biceps brachii. Understanding this function is crucial for recognizing how shoulder stability can be compromised in injuries or conditions affecting the shoulder girdle, which is directly related to the clinical practice of massage therapists and other health professionals working with shoulder mechanics.