Shoulder dislocation and its types

The shoulder is one of the most movable joints in the human body, due to its ball-and-socket structure and its broad range of motion. It easily dislocates. A shoulder dislocation happens when the arm bone, or humerus, leaves its joint in the shoulder, causing the arm to be pulled forward and away from the body. This is called shoulder joint dislocation.

Shoulder  dislocations;

A shoulder dislocation occurs when the ball of the upper arm pops out of the socket. The most common type is a downward dislocation, which happens when the arm is raised above the head.

Anterior  glenohumeral dislocation;

A shoulder dislocation occurs when the head of your upper arm bone (humerus) pops out of your shoulder socket. Anterior glenohumeral dislocations are the least common but the most serious type of shoulder dislocation.   In an anterior dislocation, the head of the humerus is forced forwards or anteriorly.

Posterior  glenohumeral dislocation;                                                                                                      

Posterior shoulder dislocation is the most common type of shoulder dislocation, which account for about 85% of all shoulder dislocations. It happens when the upper arm bone pops out of the socket from behind. The socket is called the glenoid. This type of dislocation is also called a backward or downward dislocation.

Inferior glenohumeral dislocation;                                                                                                             

 Inferior glenohumeral dislocations account for about 15% of all shoulder dislocations. In inferior dislocation both the humerus and scapula move in opposite directions during downward dislocation. The separation may be more complete than with anterior shoulder dislocation. If only a small piece of bone is torn away from the shoulder joint, then a person will not have as many symptoms as someone who has a large piece of bone that was torn away.

Shoulder dislocation and its types