sternoclavicular joint
sternoclavicular articulation

There are three joints of the shoulder: The glenohumeral, acromioclavicular, and the sternoclavicular joints.

In humans, the only true anatomical joints between the shoulder girdle and axial skeleton are the sternoclavicular joints on each side.

The sternoclavicular joint is the articulation of the manubrium of the sternum and the first costal cartilage with the medial end of the clavicle.

Sternoclavicular Joints - Are usually ordered as a single PA and a Right and Left 15 degree Right Anterior Obliques.

In the second group, the scapulocostal or scapulothoracic joint is the important physiological joint that can not function without the two anatomical joints in the group, the acromioclavicular and sternoclavicular joints, i.e. the join both ends of the clavicle.

It should be noted that the shoulder includes a Sternoclavicular articulation joint.

In infants, it often divides cephalad to the sternoclavicular articulation, within the anterior triangle of the neck.

Breschet's bone(s): Small ossicles occasionally found in the ligaments of the sternoclavicular articulation.

The origin of the right subclavian from the innominate takes place, in some cases, above the sternoclavicular articulation, and occasionally, but less frequently, below that joint.

The sternoclavicular articulation is a synovial double-plane joint composed of two portions separated by an articular disc which is made from fibrocartilage.

The articular disk of the sternoclavicular articulation is flat and nearly circular, interposed between the articulating surfaces of the sternum and clavicle.

The anterior sternoclavicular ligament is a broad band of fibers, covering the anterior (front) surface of the joint between the sternum and clavicle (sternoclavicular articulation).

On the right side the subclavian artery arises from the brachiocephalic (innominate) artery behind the right sternoclavicular articulation; on the left side it springs from the arch of the aorta.

The first part of the right subclavian artery arises from the innominate artery, behind the upper part of the right sternoclavicular articulation, and passes upward and lateralward to the medial margin of the Scalenus anterior.