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笔者对41例标本,共82侧喉上神经外支进行解剖时发现1例成年男性尸体左侧喉上神经外支变异,现报道如下:左侧喉上神经位于第2颈椎横突,发自迷走神经,在舌骨大角处分为较大的内支和细小的外支。内支与喉上动脉伴行,经甲状软骨上缘和舌骨之间穿甲状舌骨膜入喉;外支沿甲状软骨下缘行走,伴行甲状腺上动脉,并分出3支:第1支位于甲状软骨上缘发出进入甲状舌骨肌;第2支由甲状软骨下缘发出,进入咽缩肌;第3支在甲
The author of 41 cases of specimens, a total of 82 lateral thoracic nerve dissection was found in 1 adult male corpus left thoracic nerve extracranial branches were reported as follows: The left upper laryngeal nerve located in the second cervical transverse process, from Vagal nerve, at the greater angle of the hyoid bone is divided into larger internal branches and small external branches. Internal branch and the throat artery accompanied by thyroid cartilage and hyoid between the perineal thyroid perforation of the throat; the outer edge of the lower edge of thyroid cartilage walking, accompanied by thyroid artery, and divided into three: the first branch Located in the upper edge of thyroid cartilage issued into the thyroid muscle; the second branch from the lower edge of thyroid cartilage, into the pharyngeal constrictor; the first three in a