Shoulders

Multi-Directional Instability of the Shoulder

Shoulder instability usually results from a traumatic dislocation or overuse in a sport that requires hypermobility of the shoulder such as swimming, tennis and baseball pitching.  Sometimes, you can be born with lax ligaments and can be susceptible to instability. 

The humeral head (ball) can move either partially (sublux) [Figure 2] or completely (dislocate) [Figure 3] out of the socket. The humeral head can dislocate or sublux forward (anterior), backward (posterior), or out the bottom of the joint (inferior). The most common patterns are anterior and both anterior and inferior. If it is the latter, or goes out in more than one direction, then it is called multidirectional instability.

Symptoms of shoulder instability, or a feeling of “giving way,” are usually during shoulder movements or activities such as throwing or reaching behind your back such as tucking in your shirt. 

It is best to consult a medical professional to determine extent of injury.  In the meantime, it is best to rest and use ice and limit painful activities, especially overhead activities. Don’t overdo it!

 View Common Shoulder Exercises