摘要
本文发现:构成韦利氏环后半部的脑底各动脉间的相互补偿现象十分明显,因此发生较小病灶时,不出现临床症状。脑干上部既接受颈内动脉系统又接受椎-基底动脉血供,这就是脑干上部较其下部不易发生供血障碍的原因之一。后交通动脉管径过细或过粗均不利于侧支循环,易发生供血障碍。
This paper reported that the phenomenon of mutual compensation was very obvious in the combination of all arteries at the base of the brain constituting the posterior part of the Willis' ring. Therefore, clinical symptoms would not appear when a small focus took place. The superior part of the brain stem accepted blood supply from both the internal artery and the vertebobasilar artery. The disturbance of blood supply did not easily occur in the superior part of the brain stem. Whether the calider of the posterior communi cating artery was too small or too large was unfavorable to the collateral circulation and blood supply was easily disturbed.
