11.7- The Rotator Cuff 1 Quiz Please sign up for the course before taking this quiz. The glenohumeral joint has four ligaments that prevent displacement during movement.1 True False Unlike most joints that move, the shoulder joint lacks any ligaments that provide substantial stability.1 True False The rotator cuff is a group of four muscles that connect and stabilize the head of the humerus in the shoulder socket during movement.1 True False Rotator cuff muscles do their job by pulling the head of the humerus from different directions all at once.1 True False