Sternoclavicular Joint Anatomy
- Medial Clavicle
- Costoclavicular ligament (rhomboid ligament): consists of anterior and posterior fasciculus. Anterior fasciculus arises from the anteriomedial aspect of the first rib and insert more laterally on the clavicle. Posterior fasciculus arises lateral to the anterior fasciculus and inserts more medially.
- First Rib
- Anterior capsular ligament is the strongest of the SC ligaments and prevents upward displacement of the medial clavicle. (Bearn JG, J Anat 1967;101-159)
- Interclavicular ligament: arises from the upper sternum, inserts on superomedial clavicle.
- Intra-articular Disk Ligament: dense, fibrous ligament arising from the synchondral junction of the first rib to the sternum; passes through the sternoclavicular joint, dividing it into two joint spaces.