Which ligament acts as a stabilizer for the long head of the biceps brachii and contributes to the structural integrity of the GH joint?

The ligament that acts as a stabilizer for the long head of the biceps brachii and contributes to the structural integrity of the glenohumeral (GH) joint is the transverse humeral ligament. This ligament forms a bridge over the intertubercular groove of the humerus, ensuring that the tendon of the long head of the biceps remains securely in place during shoulder movements.

The transverse humeral ligament achieves stabilization by encasing the long head of the biceps brachii tendon, preventing it from dislocating out of its groove. This function is vital for maintaining the relationship between the humerus and the structures surrounding the shoulder joint. Without adequate stabilization, the tendon could be prone to injury, which could lead to pain, instability, and a compromised range of motion in the shoulder.

The other ligaments mentioned, while they play important roles in shoulder stability and function, do not specifically serve the same purpose for the long head of the biceps brachii. The coracohumeral ligament primarily supports the superior aspect of the glenohumeral joint, the glenohumeral ligaments are crucial for the stability of the joint itself, and the scapular ligament primarily supports scapular movements.