• posterior
  • The acromioclavicular capsule as a restraint to posterior translation of the clavicle: a biomechanical analysis. (edu.pl)
  • Costoclavicular ligament - the two parts of this ligament (often separated by a bursa) bind at the 1st rib and cartilage inferiorly and to the anterior and posterior borders of the clavicle superiorly. (teachmeanatomy.info)