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Coracoclavicular ligament

Recommended video: Acromioclavicular joint [01:35]
Anatomy and function of the acromioclavicular joint.

The coracoclavicular ligament is a strong extrinsic ligament of the acromioclavicular (AC) joint. It is comprised of two parts that have attachments at the acromial end of the clavicle: a posteromedial conoid part that attaches to the conoid tubercle and an anterolateral trapezoid part that attaches to the trapezoid line. Both parts merge and fuse together at their attachment on the coracoid process of the scapula. The two parts of the coracoclavicular ligament are often separated by a bursa

The coracoclavicular ligament passively suspends the scapula and free upper limb from the clavicle. It is also a strong stabilizer of the AC joint, preventing the acromion from being driven inferiorly from the clavicle (superior dislocation of the AC joint) as well as excessive rotation of the clavicle and scapula, whilst still allowing retraction and protraction of the acromion. 

Terminology English: Coracoclavicular ligament
Latin: Ligamentum coracoclaviculare
Attachments Conoid part: conoid tubercle -> coracoid process
Trapezoid part: trapezoid line -> coracoid process
Function Vertical stabilizer of acromioclavicular joint; prevents superior dislocation of acromioclavicular joint. Also prevents excessive rotation of the scapula and clavicle

Learn more about the ligaments of the upper limb with this study unit (and article):

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