What is the significance of the supraglenoid tubercle?

The supraglenoid tubercle holds significant importance as it serves as the attachment point for the long head of the biceps brachii muscle. This anatomical landmark is located on the superior aspect of the glenoid cavity of the scapula and provides a crucial origin for this muscle. The long head of the biceps is involved in various movements, such as shoulder flexion and stabilization of the shoulder joint during activities that require lifting or pulling.

The proper attachment at the supraglenoid tubercle facilitates both the anatomical function and biomechanical performance of the biceps brachii, contributing effectively to the overall strength and range of motion of the upper limb. Understanding this significance helps in diagnosing and treating shoulder-related injuries, particularly those that affect the biceps tendon or shoulder stability.