where is the rotator cuff located on the human body
Rotator cuff The rotator cuff muscles are important in shoulder movements and in maintaining glenohumeral joint (shoulder joint) stability.[4] These muscles arise from the scapula and connect to the head of the humerus, forming a cuff at the shoulder joint. They hold the head of the humerus in the small and shallow glenoid fossa of the scapula. The glenohumeral joint has been analogously described as a golf ball (head of the humerus) sitting on a golf tee (glenoid fossa).[5]
Supraspinatus muscle The supraspinatus muscle performs abduction of the arm, and pulls the head of the humerus medially towards the glenoid cavity.[5] It independently prevents the head of the humerus to slip inferiorly.[5] The supraspinatus works in cooperation with the deltoid muscle to perform abduction, including when the arm is in adducted position.[5] Beyond 15 degrees the deltoid muscle becomes increasingly more effective at abducting the arm and becomes the main propagator of this action.[6]