sternoklavikulärleden

The sternoclavicular joint, or sternoklavikulärleden in German, is a crucial articulation in the human body connecting the clavicle (collarbone) to the sternum (breastbone). It is one of only two joints that directly attach the appendicular skeleton to the axial skeleton, the other being the acromioclavicular joint. This joint is a synovial saddle joint, meaning its articular surfaces are reciprocally concave and convex, allowing for a wide range of motion.

The sternoclavicular joint is formed by the medial end of the clavicle articulating with the clavicular notch of the manubrium, the uppermost part of the sternum. A fibrocartilaginous disc divides the joint cavity into two compartments, contributing to its stability and shock absorption. The joint is further reinforced by several strong ligaments, including the anterior and posterior sternoclavicular ligaments, the interclavicular ligament, and the costoclavicular ligament.

Despite its relative immobility compared to other synovial joints, the sternoclavicular joint plays a vital role in shoulder girdle movement. It allows for elevation, depression, protraction, retraction, and circumduction of the clavicle. This movement directly influences the position and range of motion of the entire arm. Injuries to the sternoclavicular joint, such as dislocations and fractures, can significantly impair shoulder function and often require medical attention.