Belen'kaia R M
Zh Nevropatol Psikhiatr Im S S Korsakova. 1976;76(7):1023-7.
The author describes the anatomical findings among the variants of brain arteries in 360 deceased where 160 of them had a hemorrhagic or ischemic stroke, while 200 had no brain diseases. Those cases where strokes were revealed the author found a separation in the posterior part of the circle of Willis--between the carotid and vertebro-basillar systems. This could happen due to an aplasia of one or both posterior connective arteries, or due to the absence of a connecting vessel between an atypically diverging posterior brain artery (posterior trifurcation) and the basillar artery. It is assumed that this circumstance has a definite significance in the pathogenesis of hemorrhages.
作者描述了360例死者脑动脉变异中的解剖学发现，其中160例发生了出血性或缺血性中风，而200例没有脑部疾病。在那些发现中风的病例中，作者发现 Willis 环后部——在颈动脉和椎基底动脉系统之间存在分离。这可能是由于一条或两条后交通动脉发育不全，或者是由于异常分叉的后脑动脉（后三叉）与基底动脉之间没有连接血管。据推测，这种情况在出血性疾病的发病机制中具有一定意义。
