When Going along with the fifth metacarpal bone head, the descending branch or little finger artery ulnaris sent off the ～ pieces periosteum branch with diameter .7±0. mm,which distributed in the periosteal on the back of fifth metacarpal bone.
When Going along with the fifth metacarpal bone head, the descending branch or little finger artery ulnaris sent off the ～ pieces periosteum branch with diameter .7±0. mm,which distributed in the periosteal on the back of fifth metacarpal bone.
降支或小指动脉尺侧支循第 掌骨头尺侧走行时发 ～ 支、外径 0 . ～ 0 .7mm骨膜支 ,分布于第 掌骨背内面骨膜。