Here you can see the rotator cuff muscle colored in brown. The rotator cuff is a group of muscles in the shoulder connecting the upper arm to the scapula. The rotator cuff provides stability to the shoulder. During a lying lateral raise, the rotator cuff muscles contribute to shoulder stability and controlled movement. As the arm moves away from the body, the supraspinatus assists in abduction while the infraspinatus and teres minor help manage external rotation, preventing excessive anterior tr

The Deep External Rotators of the Hip Made Easy