acromioclaviculära

The acromioclavicular joint, often abbreviated as the AC joint, is a significant articulation in the shoulder complex. It is formed by the union of the distal end of the clavicle, also known as the collarbone, and the acromion, which is a bony projection from the scapula, or shoulder blade. This joint is a gliding synovial joint, allowing for a limited range of motion that contributes to the overall mobility and stability of the shoulder.

Several ligaments are crucial for the integrity of the AC joint. The acromioclavicular ligament itself provides primary stability to the superior and inferior aspects of the joint. More importantly, the coracoclavicular ligaments, consisting of the conoid and trapezoid ligaments, offer strong vertical support and prevent superior displacement of the clavicle. These ligaments are essential for maintaining the proper alignment of the clavicle with the acromion.

Disruptions to the AC joint are common, particularly in athletes involved in contact sports or falls. These injuries are typically classified by their severity, ranging from mild sprains to complete separations where the clavicle is visibly elevated. Symptoms can include pain, swelling, bruising, and a palpable deformity at the top of the shoulder. Treatment varies depending on the grade of injury and may involve conservative measures like rest and physical therapy, or surgical intervention for more severe cases. The AC joint plays a vital role in shoulder function, and injuries to this area can significantly impact daily activities and athletic performance.