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掌骨[V]
Os metacarpale [V]
定义
第五掌骨（os metacarpale V；小指掌骨）在其底部的上表面具有一个关节面，该关节面呈凹凸形，与钩骨形成关节；在其桡侧亦有一个关节面，与第四掌骨形成关节。在其尺侧有一个明显的结节，供尺侧腕伸肌腱附着。骨体的背侧面被一条斜嵴分为两部分，该斜嵴从底部尺侧附近延伸至骨头的桡侧。该面的外侧部分供第四骨间背侧肌附着；内侧部分光滑，呈三角形，由小指伸肌腱覆盖。
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/).
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