Assistant
Definition
By Gregory R. Waryasz, MD
The coracoacromial ligament of the musculoskeletal system is characterized by its location and function.
It is part of the shoulder joint. It consists of fibrous dense regular connective tissue of collagen fibers.
Its unique structural feature is that a strong triangular shaped band connecting the coracoid process to the acromion. It spans the coracoacromial arch.
The coracoacromial 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 coracoacromial ligament is to help to protect the head of the humerus and prevent superior displacement from the glenoid cavity.
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, a sling, and NSAIDs. Surgery can be performed for some dislocation injuries.
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.