Costoclavicular ligament

Illustration of the costoclavicular ligament

The costoclavicular ligament is a strong band of connective tissue that plays a crucial role in stabilizing the clavicle by anchoring it to the first rib. It is an important structure in the shoulder girdle and contributes to the overall stability and function of the sternoclavicular joint.

Anatomy

The costoclavicular ligament is located at the junction where the clavicle meets the first rib. It is a short, flat, and rhomboid-shaped ligament that extends from the superior aspect of the first rib to the inferior surface of the clavicle. The ligament is composed of dense fibrous connective tissue, which provides it with the strength necessary to withstand the forces exerted on the shoulder girdle.

Function

The primary function of the costoclavicular ligament is to limit the elevation of the clavicle, thereby stabilizing the sternoclavicular joint. This ligament acts as a check against excessive movement of the clavicle, particularly during activities that involve lifting the arms or carrying heavy loads. By anchoring the clavicle to the first rib, the costoclavicular ligament helps maintain the alignment and integrity of the shoulder girdle.

Clinical Significance

Injuries to the costoclavicular ligament can occur due to trauma or overuse. Such injuries may lead to instability of the sternoclavicular joint, resulting in pain and limited range of motion in the shoulder. Understanding the anatomy and function of the costoclavicular ligament is essential for diagnosing and treating conditions related to the shoulder girdle.

Related Pages

• Clavicle
• First rib
• Sternoclavicular joint
• Shoulder girdle