Understanding the Impact of Clavicle Fractures on the Supraspinatus Muscle and the Rotator Cuff

Which rotator cuff muscle is most likely to be injured with a clavicle fracture?

The rotator cuff is a group of four muscles located in the shoulder that work together to provide stability and control to the joint

The rotator cuff is a group of four muscles located in the shoulder that work together to provide stability and control to the joint. These muscles include the supraspinatus, infraspinatus, teres minor, and subscapularis. Each muscle plays a role in different movements of the shoulder joint.

When a clavicle fracture occurs, it generally results from a direct blow or trauma to the collarbone. This type of injury can cause significant damage to surrounding structures, including the rotator cuff muscles.

Out of the four rotator cuff muscles, the supraspinatus muscle is most likely to be injured with a clavicle fracture. The supraspinatus is located in the upper part of the shoulder blade, and its tendon passes through a narrow space called the subacromial space before attaching to the greater tuberosity of the humerus (upper arm bone). This anatomical arrangement makes the supraspinatus tendon vulnerable to compression and impingement, especially in the case of a clavicle fracture.

When a clavicle fracture occurs, it can cause displacement or movement of the broken bone fragments. This displacement, along with the associated swelling and inflammation, can put pressure on the supraspinatus tendon and lead to impingement syndrome or even a tear.

Symptoms of a supraspinatus injury due to a clavicle fracture may include pain in the shoulder, weakness, difficulty raising the arm, and limited range of motion. A comprehensive examination, including imaging studies such as X-rays or magnetic resonance imaging (MRI), is often necessary to confirm the diagnosis.

Treatment for a supraspinatus injury related to a clavicle fracture may involve conservative approaches, such as rest, ice, physical therapy, and anti-inflammatory medications. In some cases, surgical intervention may be required to repair the torn tendon or reposition the clavicle fragments.

It is important to note that while the supraspinatus muscle is most likely to be injured with a clavicle fracture, other rotator cuff muscles can also be affected. Therefore, a thorough evaluation by a healthcare professional is crucial to determine the full extent of the injury and develop an appropriate treatment plan.

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