title: [Role of interruption of the circle of Willis in the genesis of hemorrhagic stroke].
abstract: 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.
mesh_terms: D000368:Aged; D002543:Cerebral Hemorrhage / Q000209:etiology* / Q000473:pathology; D002561:Cerebrovascular Disorders / Q000209:etiology* / Q000473:pathology; D002941:Circle of Willis / Q000002:abnormalities* / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged
vernacular_title: Rol' razobshcheniia villizierva kruga v geneze gemorragicheskogo insul'ta