环状关节面
Circumferentia articularis capitis radii
定义
头的关节环面光滑；其内侧较宽，与尺骨的桡切迹相关节，其余部分较窄，由桡骨环状韧带所环绕。
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/).
