Definition
By Gregory R. Waryasz, MD
The wrist joint capsule of the musculoskeletal system is characterized by covering the wrist joint.
It is part of the wrist joint. It consists of a fibrous layer and an internal synovial membrane.
Its unique structural feature is that it surrounds the wrist joint and attaches to the distal ends of the radius and ulna and to the proximal carpal row (scaphoid, lunate, and triquetrum).
The wrist joint capsule as well as all other bones, muscles, and ligaments of the body are derived of mesodermal origin in the embryo.
The function of the wrist joint capsule is to provide some stability to the articulation. It is deficient over the superior distal radioulnar joint.
Common diseases include fracture, dislocation, tearing, and ganglion cysts.
A ganglion cyst is a mucinous filled cyst near the joint capsule or tendon sheath that occurs more commonly on the dorsal surface of the upper extremity.
Commonly used diagnostic procedures include clinical history, physical exam, and MRI.
It is usually treated with physical therapy and NSAIDs. Surgery can be performed either with a large open incision or performed with arthroscopy.
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.