脑的循环障碍可能是脑的许多原因不明的疾病的基础,也就是说,脑的疾病很大一部分可能是以脑的循环障碍为基础的。这意味着,了解脑循环并进而认识脑循环障碍与脑疾病之间的关系是十分重要的。正是由于这种关系,作为脑循环结构基础的脑血管解剖的研究一直引起人们的注意,并且工作步步深入,不仅在脑的器官外血管上做了大量工 Circulatory disorders of the brain may be the basis for many unexplained diseases of the brain, that is, a large proportion of the brain’s disease may be based on circulatory disturbance in the brain. This means that it is important to understand the relationship between the cerebral circulation and, in turn, the understanding of the relationship between cerebral circulation disorder and brain disease. It is because of this relationship that the study of cerebrovascular anatomy, which underlies the structure of the cerebral circulation, has drawn attention and progressed step by step, not only in the extravascular volume of the brain