Which one of the following structures increases the depth of glenohumeral joint?

The structure that increases the depth of the glenohumeral joint is the glenoid labrum.

Explanation

1. Function of the Glenoid Labrum: The glenoid labrum is a fibrocartilaginous structure that surrounds the glenoid cavity of the scapula (shoulder blade). It serves to deepen the socket for the humeral head (the top of the arm bone), providing increased stability to the joint.

2. Importance in Joint Stability: By deepening the glenoid cavity, the labrum helps in gripping the humeral head more securely, which is crucial for the overall stability and function of the shoulder joint during arm movements.

3. Relation to Joint Disorders: Damage or tears to the glenoid labrum can lead to joint instability and conditions such as shoulder dislocation or labral tears, highlighting its importance in the anatomy and function of the glenohumeral joint.

In summary, the glenoid labrum enhances the functionality and stability of the shoulder joint by increasing the depth of the glenoid cavity.