Explain how the glenohumeral joint remains stable during movement. Provide information about specific muscles and ligaments to support your answer.

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The Answer is The glenohumeral joint, also known as the shoulder joint, remains stable during movement through the coordinated action of muscles and ligaments.

The muscles that contribute to the stability of the glenohumeral joint include the rotator cuff muscles, which consist of the supraspinatus, infraspinatus, teres minor, and subscapularis. These muscles work together to keep the head of the humerus (upper arm bone) centered within the glenoid fossa (shoulder socket) during movement. The supraspinatus helps to initiate abduction of the arm, while the infraspinatus and teres minor assist in external rotation, and the subscapularis aids in internal rotation. Additionally, the deltoid muscle provides support and stability during arm movements.

In addition to the muscles, the glenohumeral joint is supported by ligaments such as the glenohumeral ligaments, which help to reinforce the joint capsule and provide stability. The superior, middle, and inferior glenohumeral ligaments help to prevent excessive movement of the humerus and maintain the integrity of the joint during various arm movements.

Overall, the coordinated action of the rotator cuff muscles, deltoid muscle, and glenohumeral ligaments work together to maintain stability and prevent dislocation of the glenohumeral joint during movement.

Explain How the Glenohumeral Joint Remains Stable During Movement