肩胛背动脉和肩胛上动脉变异一例
Anatomy Research（2019）
Abstract
肩胛背动脉正常起于颈横动脉或锁骨下动脉,肩胛上动脉起源于甲状颈干.本文发现一具成年男尸,右侧的肩胛背动脉与肩胛上动脉共干(图1),起自于前斜角肌的后面,即锁骨下动脉的第2段,向后外经臂丛的上干与中干之间穿过,至中斜角肌的外缘分为肩胛背动脉和肩胛上动脉.肩胛背动脉比肩胛上动脉粗大.肩胛背动脉经肩胛提肌的深面至肩胛骨内侧下降,肩胛上动脉向后外经肩胛上切迹入冈上窝.肩胛背静脉伴随在肩胛背动脉的内侧,肩胛上静脉位于肩胛上动脉的后方,两条静脉在中斜角肌的外缘汇合后经臂丛的上干与中干之间穿过,在肩胛背动脉与肩胛上动脉共干的外侧,越过锁骨下动脉的上方,最后经前斜角肌的外侧,注入颈外静脉.左侧的肩胛背动脉与肩胛上动脉的起源和行程与右侧一样.
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