The teres minor muscle is a small muscle located in the posterior region of the shoulder. It is one of the four muscles that make up the rotator cuff, along with the supraspinatus, infraspinatus, and subscapularis muscles. The teres minor originates from the lateral border of the scapula, specifically on the middle half of the axillary border, and inserts onto the greater tubercle of the humerus.
Functionally, the teres minor muscle plays an important role in the stabilization and movement of the shoulder joint. It works in coordination with the other rotator cuff muscles to externally rotate the shoulder, meaning it helps to rotate the arm away from the body. Additionally, it assists in the abduction of the arm, allowing it to move away from the midline of the body. As a member of the rotator cuff, it also contributes to the stabilization and support of the shoulder joint during various activities, such as throwing, lifting, and reaching overhead.
Injury to the teres minor muscle can occur due to overuse, traumatic injury, or repetitive motions involving the shoulder joint. This can result in pain, weakness, and limited range of motion in the shoulder. Rehabilitation exercises, such as stretching and strengthening, along with other conservative treatments like rest, ice, and physical therapy, are commonly used for the management and recovery from teres minor muscle injuries.
