What structure does the Transverse Humeral Ligament help retain?

The Transverse Humeral Ligament plays a critical role in the stability of the shoulder by serving to retain the Long Head of the Biceps tendon within the bicipital groove of the humerus. This ligament spans between the greater and lesser tubercles of the humerus, effectively creating a roof over the bicipital groove. By anchoring the tendon in place, the Transverse Humeral Ligament protects it from displacement during shoulder movement, ensuring proper function and biomechanics during activities that involve the biceps muscle.

The importance of this structure becomes particularly clear during actions that involve lifting or rotating the arm, where the stabilization of the biceps tendon is essential for maintaining shoulder integrity and function. If this ligament were compromised, the biceps tendon could subluxate or become dislocated, leading to pain and limitation in shoulder mobility.

In contrast, the other structures mentioned—such as the humeral head, rotator cuff tendons, and scapular spine—are either not retained by the Transverse Humeral Ligament or do not rely on it for stabilization, highlighting why the biceps tendon is the correct choice in this context.