What is the role of the teres minor muscle?

The teres minor muscle plays a significant role in the lateral rotation of the arm. It is one of the rotator cuff muscles, along with the supraspinatus, infraspinatus, and subscapularis, and it is located in the shoulder region. When the teres minor contracts, it helps to rotate the humerus laterally, an essential movement that aids in various activities, particularly those involving overhead motions or when the arm is raised.

Understanding the function of the teres minor in lateral rotation is crucial for athletes and fitness professionals, as it can help maintain shoulder stability and prevent injuries. Many arm movements, such as throwing or swimming, require effective lateral rotation, making the teres minor a key muscle in these actions.