环状关节面
Circumferentia articularis capitis ulnae
定义
尺骨头的关节环状面呈椭圆形或半月形，朝向下方，与三角关节盘的上表面相关节，该关节盘将其与腕关节分隔开；
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
