title: [Comparisons of cerebral circulation parameters in schoolchildren living in the Far East and European North].
abstract: Transcranial Doppler sonography and impedansometry was used to study cerebral circulation in students aged from 7 to 17 living in the North in the "absolute discomfort" area (Magadan region. 62 degrees North, 158 degrees East, n = 167) and "discomfort" area (Arkhangelsk region, 61 degrees North, 41 degrees East, n = 52). New data were obtained about both blood flow parameters in main cerebral arteries, vessels tone and vasomotor reactivity as well as differences between these indices in children from the two northern areas. The results reveal that arterial blood flow velocity (BFV) in cerebral arteries is faster in Koryaks and Evens who are the children of the native population compared to BFV in the children born in the North whose parents represent newcomers. A tendency exists in the form of vascular tone rising in the living in the North students. This tendency is more expressed in children and adolescents from Magadan region which is distinguished from Arkhangelsk region by more severe climate. The indices that characterize individual alterations of cerebral circulation under hypoxic-cold factors as well as population peculiarities related to "polar adaptive type of metabolism" forming are discussed.
authors.forename: V P
authors.initials: VP
authors.lastname: Rozhkov
authors.forename: I V
authors.initials: IV
authors.lastname: Nikolaev
authors.forename: S I
authors.initials: SI
authors.lastname: Soroko
mesh_terms: D000222:Adaptation, Physiological; D000293:Adolescent; D001783:Blood Flow Velocity / Q000502:physiology*; D001921:Brain / Q000098:blood supply*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D002648:Child; D003081:Cold Climate; D017097:Electric Impedance; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D012426:Russia; D017585:Ultrasonography, Doppler, Transcranial / Q000379:methods