The ulnocapitate ligament is the most superficial of the palmar ulnocarpal ligaments, arising from the ulnar fovea and palmar radioulnar ligament and passing palmar to the ulnolunate and ulnotriquetral ligaments to reach the capitate. Its fibres interlace with those of the radioscaphocapitate ligament to form the arcuate (distal V) ligament of the palmar wrist.
| Origin | Fovea of the ulna and the palmar radioulnar ligament |
|---|---|
| Insertion | Palmar neck of the capitate, interlacing with fibres of the radioscaphocapitate ligament |
| Actions |
|
|---|
Stabilises the ulnar carpus against supination and palmar translation and supports the midcarpal joint as part of the arcuate ligament.
The ulnocapitate ligament is injured together with other ulnocarpal ligaments and the TFCC in falls on the outstretched hand and twisting injuries, contributing to ulnar-sided wrist pain. Loss of the ulnar arm of the arcuate ligament is implicated in midcarpal and ulnocarpal instability. Because it attaches near the fovea, foveal TFCC tears may be accompanied by ulnocapitate disruption, best assessed by MR arthrography or arthroscopy.
Disruption of the ulnocapitate ligament together with neighbouring ulnocarpal ligaments or the TFCC, producing ulnar-sided wrist pain, weak grip and pain on forearm rotation.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
