Wismer G L
Department of Radiology, Baptist Medical Center, Jacksonville, Florida.
Neuroradiology. 1989;31(4):366-8. doi: 10.1007/BF00344189.
Primitive caroticobasilar anastomoses are uncommon embryonic arterial connections between the carotid (anterior) and vertebrobasilar (posterior) circulations. With the exception of extracranial proatlantal intersegmental arteries, these embryonic arterial anastomoses are named according to the cranial nerves which they parallel. In this report, a previously undescribed variant circle of Willis with supraclinoid caroticobasilar anastomosis, functionally equivalent to a fetal type primitive trigeminal artery, is presented.
原始颈基底吻合是颈动脉（前循环）和椎基底动脉（后循环）之间不常见的胚胎动脉连接。除颅外寰椎前节段间动脉外，这些胚胎动脉吻合根据与其平行的颅神经命名。在本报告中，展示了一种先前未描述的具有鞍上颈基底吻合的Willis环变异，其功能等同于胎儿型原始三叉动脉。
