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Breast-clavicular joint
Last reviewed: 23.04.2024
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The sternoclavicular joint (art. Sternoclavicularis) is formed by the sternal end of the clavicle and the clavic notch of the sternum. Joint surfaces in form approach saddle. Between them in the joint cavity there is an articular disc (discus articularis), which on the periphery fuses with the capsule of the joint. The joint capsule is strengthened by the anterior and posterior sternoclavicular ligaments (Iigg. Sternoclavicularia anterius and posterius). Above the joint above the jugular notch of the sternum between the sternal ends of the collarbone is the interclavicular ligament (lig. Interclaviculare). The joint is also strengthened by an extra - encapsulated costoclavicular ligament (lig. Costoclaviculare). It connects the lower surface of the sternal end of the clavicle and the upper surface of the 1st rib.
The presence of an articular disc at this joint and a relatively free joint capsule make it possible to perform movements close to those in the globular joint. In the sternoclavicular joint, the following movements are possible: raising and lowering the clavicle around the sagittal axis, moving the acromial end of the clavicle forward and backward with respect to the vertical axis and circular. The volume of movements is limited by the ligaments that strengthen this joint.
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