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By methods of extra- and transcranial dopplerography, reoencephalography evaluation of correspodence of brain hemoperfusion and reserves of autoregulation during rest and functional tests in patients was carried out with early manifestations of insufficient blood supply of brain. For this purpose 114 patients with such disease and 70 healthy people were examined. The most diagnostic significance for revealing disorders of cerebral hemodynamics in people with early manifestations of ischemic lesion of brain, have alterations of values of linear blood flow speed, range of cerebrovascular reactivity, values of circulation resistance. They indicate adequacy of hemoperfusion, presence of stenosis and intracerebral overdistribution of circulating blood. Pathogenetic variants of insufficient cerebral blood supply are shown in the verterbrobasilar basin.