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, ...

Hip impingement is a condition where the ball and socket of the hip joint do not fit together as they should. In serious cases, surgery can repair the joint and resolve symptoms. The medical term for ...

Posterior shoulder dislocation occurs when the top of the upper arm bone, known as the humerus, moves backward out of its socket. This causes pain, muscle spasms, and a limited range of motion. The ...