The subscapularis muscle causes medial rotation of the humerus by inserting on the lesser tubercle, working in conjunction with other rotator cuff muscles to support shoulder joint movements.
The subscapularis muscle is responsible for medial rotation of the humerus. It inserts on the lesser tubercle of the humerus. This muscle, along with the other rotator cuff muscles, plays a crucial role in stabilizing and controlling the movements of the shoulder joint.
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