[Roentgenmorphology of the sulcus of the extensor carpi ulnaris muscle (author's transl)].

For the roentgenographic definition of the form of the Sulcus extensor carpi ulnaris muscle 500 plain roentgenfilms of the wrist were examined. Three types were differentiated: Type I narrow sulcus, type II large sulcus, and type III no sulcus. In types Ia and IIa the distal end was slanted. They were classified as forms with increased concomitance of lesions of the radial part of the wrist. Consequences for joint mechanics are briefly discussed.