What muscle is responsible for shoulder abduction?

The supraspinatus is the muscle that plays a key role in shoulder abduction. It is one of the rotator cuff muscles located at the top of the shoulder and is primarily responsible for initiating the abduction of the arm. This muscle contributes to lifting the arm away from the body, particularly during the first 15 degrees of movement before the deltoid muscle takes over for further abduction.

Understanding the specific function of muscle anatomy is crucial in disciplines like Pilates, where movement patterns and correct muscle engagement are fundamental principles. In this case, the supraspinatus's action of stabilizing the shoulder joint and aiding in abduction highlights its importance in many exercises that focus on shoulder mobility and strength. Familiarity with this muscle aids in creating targeted training regimens that promote balanced development and prevent injury.