The shoulder is the most mobile joint in the body. The anatomy of the shoulder, including the muscles and tendons around the shoulder allow for this mobility. The shoulder has three different areas, or joints, called the: glenohumeral joint (the ball and socket), acromial clavicular joint (A/C joint) and scapulo thoracic joint (the articulation between the shoulder blade and the rib cage).


There are several muscles around the shoulder. The biggest is the deltoid muscle, which is the muscle that can be felt when you touch your shoulder. Below the deltoid muscle, there are four rotator cuff muscles. These muscles are the most commonly injured muscles of the shoulder. Injuries can occur to the rotator cuff, the joint capsule, labrum, ligaments, or the bones.



  • Multi-Directional Instability (MDI)
  • Proximal Humeral Epiphysiolysis (Little Leaguer’s Shoulder)
  • Shoulder Impingement Syndrome (Swimmer’s Shoulder)
  • Shoulder Labral Tears
  • Shoulder Separation