Lemak Shoulder Diagnosis

The three most common types of injury in the shoulder are AC Joint separations, dislocation, and tearing of the rotator cuff tendon.

The AC joint is a joint in the shoulder where the collarbone (clavicle) joins the shoulder blade (scapula). The specific part of the scapula adjacent to the clavicle is called the acromion, which is where the name AC joint is derived from. The AC Joint is not the main joint of the shoulder, which is the glenohumeral joint, which is the ball and socket joint which forms the shoulder.

Because the shoulder has the greatest range of motion of any joint in the body, it is also the most common for dislocation. Dislocation happens when the ball of the joint (humeral head) comes apart or out of alignment with the socket (glenoid). In many cases people also have whats known as subluxation, which occurs when the shoulder does not dislocate completely, and the ball returns to its normal location after pausing on the rim of the socket.

The rotator cuff is a group of four tendons and muscles that converge around the top of the humerus, the upper portion of the arm bone above the elbow. Together, they form a ''cuff'' that both holds your arm in place and allows it to move in multiple directions. Too much stress on this joint can cause partial tears and swelling in the tendons of the rotator cuff. Abrupt stress may even cause one of the tendons to pull away from the bone or tear in the middle of the tendon.