Pain in the shoulder suggests a shoulder injury and shoulder injuries are more common in athletes participating in sports such as swimming, tennis, pitching, and weightlifting. The injuries are caused due to the over usage or repetitive motion of the arms. In addition to pain, shoulder injuries also cause stiffness, restricted movements, difficulty in performing routine activities, and popping sensation.
Fig: Anatomy of Shoulder
The shoulder is the most flexible joint in the body making it the most susceptible to instability and injury. It is a ‘ball-and-socket’ joint. A ‘ball’ at the top of the upper arm bone (the humerus) fits neatly into a ‘socket’, called the glenoid, which is part of the shoulder blade (scapula). Three bones, the collarbone (clavicle), the shoulder blade (scapula), and the upper arm bone (humerus) come together to form the shoulder.
The soft tissues of shoulder joint include rotator cuff, biceps tendon, caraco clavicular ligament, and articular cartilage or the capsule.
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