Assistant
Definition
By Gregory R. Waryasz, MD
The coracohumeral ligament of the musculoskeletal system is characterized by its location and function.
It is part of the glenohumeral joint. It consists of fibrous dense regular connective tissue of collagen fibers.
Its unique structural feature is that it is a strong band that connects the base of the coracoid process to the anterior portion of the humerus’s greater tubercle.
The coracohumeral ligament as well as all other bones, muscles, and ligaments of the body are derived of mesodermal origin in the embryo.
The function of the coracohumeral ligament is to help limit external rotation in adduction. It is a static restraint to inferior translation of the humerus when there is 0 degrees of abduction and external rotation.
Common diseases include ligament tears resulting in dislocation.
Commonly used diagnostic procedures include clinical history, physical exam, x-ray, and MRI.
It is usually treated with physical therapy and NSAIDs. Surgery can be performed when a closed reduction of the dislocation is unsuccessful.
References
Elstrom J, Virkus W, Pankovich (eds), Handbook of Fractures (3rd edition), McGraw Hill, New York, NY, 2006.
Koval K, Zuckerman J (eds), Handbook of Fractures (3rd edition), Lippincott Williams & Wilkins, Philadelphia, PA, 2006.
Lieberman J (ed), AAOS Comprehensive Orthopaedic Review, American Academy of Orthopaedic Surgeons, 2008.
Moore K, Dalley A (eds), Clinically Oriented Anatomy (5th edition), Lippincott Williams & Wilkins, Philadelphia, PA, 2006.