Your rotator cuff includes several muscles that support range of motion in your arm and shoulder while holding the socket in place. The rotator cuff is a group of four muscles that hold your upper arm ...

The shoulder muscles are responsible for maintaining the widest range of motion of any joint in your body. This flexibility is also what makes the shoulder prone to instability and injury. Muscles, ...

Medically reviewed by Mallory Christopherson, DC Key Takeaways The shoulder joint is made up of four joints that work together for movement and stability.The rotator cuff, which includes four muscles, ...