What happens to the scapula during shoulder abduction?

During shoulder abduction, the scapula undergoes upward rotation. This movement is essential for optimizing the range of motion and allowing the arm to move freely above the head. As the arm is raised laterally away from the body, the glenoid cavity of the scapula also moves to align with the head of the humerus, facilitating a stable and efficient movement pattern.

Upward rotation of the scapula is achieved through the coordinated action of various muscles, primarily the trapezius and serratus anterior. This rotation helps maintain proper scapulohumeral rhythm and ensures that the shoulder joint functions effectively without restrictions. In contrast, if the scapula were to remain stationary, it could lead to compromised mechanics and potentially painful impingements during the overhead movement. Thus, the upward rotation of the scapula is critical for successful shoulder abduction and overall shoulder health.