Nakashima T, Hojo T, Furukawa H
Department of Anatomy and Anthropology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
J Anat. 1993 Dec;183 ( Pt 3)(Pt 3):635-8.
Anatomical variations in the sulcus for the tendon of extensor carpi ulnaris were studied in 240 upper limbs. The sulcus lies between the head and the styloid process on the dorsal surface of the distal end of the ulna. This groove has deep and shallow forms and, rarely, a flat form. The sulcus was classified into 4 grades according to its depth. Grade I, a deep sulcus, was found in 51.3%. Grades II and III are shallow, but the styloid process in grade II is more prominent than in grade III. The former was found in 28.8%, the latter in 14.2%. Grade IV is a flat form. This was rare and found only in 1.3%. This variation was not age-related, but was a congenital feature.
对240例上肢的尺侧腕伸肌腱沟的解剖变异进行了研究。该沟位于尺骨远端背侧的头部与茎突之间。此沟有深沟和浅沟两种形态，极少为扁平形态。根据沟的深度将其分为4级。I级为深沟，占51.3%。II级和III级为浅沟，但II级的茎突比III级更突出。前者占28.8%，后者占14.2%。IV级为扁平形态。此型罕见，仅占1.3%。这种变异与年龄无关，而是一种先天性特征。
