The ulnar shaft is the relatively straight medial bone of the forearm, subcutaneous along its posterior (dorsal) border throughout its length. Its anterior surface gives origin to flexor digitorum profundus, and its posterior surface to extensor carpi ulnaris, extensor digitorum, and extensor indicis. The ulna is the fixed axis around which the radius rotates during pronation and supination.
The subcutaneous ulnar border makes it vulnerable to direct trauma (nightstick fracture) and easily palpable throughout. Isolated ulnar shaft fractures are treated non-operatively unless displaced more than 50% or angulated more than 10 degrees. Monteggia fracture combines an ulnar shaft fracture with radial head dislocation and requires surgical fixation.
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.
