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椎动脉通常起自锁骨下动脉第1段,在第6～1颈椎横突孔上行经枕骨大孔至颅腔.作者在1例学生局解用男性尸体上见左侧椎动脉发自主动脉弓,现报道如下:主动脉弓自右向左的分支依次为头臂干、左颈总劲脉、左椎动脉和左锁骨下动脉.左椎动脉起始后在左颈总动脉的后方、气管与食管的左侧面上行至颈部,在前斜角肌内侧、椎前肌表面上行,入第4颈椎横突孔,依次经第3～1颈椎横突孔上行至枕骨大孔入颅腔.该动脉起始处外径3.3mm,穿入横突孔处的外径为3.0mm,起始处至穿入横突孔处的长度为97mm,沿途未见分支.同侧的椎静脉于第6颈椎横突孔穿出后注入左锁骨下静脉.右侧椎动脉起源、走行未见异常.左椎动脉起源的此种变异,在临床经股
Vertebral artery usually from the first paragraph of the subclavian artery in the first 6 ~ 1 cervical transverse foramen through the foramen magnum to the cranial cavity.An example of the student bureau solution of male corpus seen on the left vertebral artery from the aortic arch, now Reported as follows: aortic arch from right to left branches followed by the brachiocephalic trunk, left common carotid artery, left vertebral artery and left subclavian artery after the left vertebral artery in the left common carotid artery behind the trachea and left esophagus Lateral up to the neck, medial anterior scalene muscle, the anterior surface of the anterior descending muscle into the fourth cervical transverse foramen, followed by the first 3 ~ 1 cervical transverse hole up to the foramen magnum into the cranial cavity of the artery At the outer diameter of 3.3mm, the diameter of the transverse puncture hole into the outer diameter of 3.0mm, the beginning to penetrate the transverse foramen at a length of 97mm, no branch along the way.The ipsilateral vertebral vein in the 6th cervical transverse process Hole punctured into the left subclavian vein.The right vertebral artery origin, no abnormal walking.This vertebral artery origin of such variation, in the clinical stock