Which four muscles and tendons are part of the rotator cuff in the shoulder?

The rotator cuff is a group of four specific muscles and their associated tendons that play a crucial role in stabilizing the shoulder joint and facilitating a wide range of arm movements. The correct answer includes the Subscapularis, Infraspinatus, and Supraspinatus muscles, which are all integral components of the rotator cuff, along with the Teres minor, which is not included in the available options.

The Subscapularis muscle is located on the anterior side of the scapula and is responsible for internal rotation of the shoulder. The Infraspinatus muscle is situated on the posterior aspect of the scapula and primarily facilitates external rotation. Similarly, the Supraspinatus muscle, located above the spine of the scapula, aids in shoulder abduction.

Understanding the role of each of these muscles is pivotal for diagnosing and treating shoulder injuries, as they contribute to maintaining shoulder stability and mobility. The incorrect options include muscles that are not part of the rotator cuff, such as the Deltoid and Trapezius, which serve different functions in shoulder movement but are not involved in forming the rotator cuff itself.