What is the anatomical relationship between the clavicle and sternoclavicular (SC) joint?

Updated: Jan 14, 2019
  • Author: Benjamin P Kleinhenz, MD; Chief Editor: Craig C Young, MD  more...
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The clavicle articulates with the sternum at the sternoclavicular (SC) joint and with the acromion at the AC joint. Many ligamentous structures attach to the clavicle and provide stability for the articulations with the sternum and the acromion. The primary stabilizers of the SC joint are the anterior and posterior capsules. Other ligamentous structures attaching here are the interclavicular ligament and the costoclavicular ligament. Stability of the SC joint in the anterior-posterior plane is derived predominantly from the posterior capsule, with additional stability conferred by the anterior capsule. The interclavicular and costoclavicular ligaments have little effect on stability of the joint.

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