EEG correlates of geno-phenotypical features of the brain development in children of the native and newcomers' population of the Russian North-East
Soroko, S.I.; Bekshaev, S.S.; Rozhkov, V.P.
Rossiiskii Fiziologicheskii Zhurnal Imeni I.M. Sechenova 98(1): 3-26
2012
ISSN/ISBN: 0869-8139 PMID: 22586927 Document Number: 663346
Traditional and original methods of EEG analysis were used to study the brain electrical activity maturation in 156 children and adolescents from 7 to 17 years old who represented the native (Koryaks and Evenks) and newcomers' populations living in severe climatic and geographic conditions of the Russian North-East. New data revealing age-, sex- and ethnic-related features in quantitative EEG parameters are presented. Markers are obtained that characterize alterations in the structure of interaction between different EEG rhythms. The results demonstrate age-dependent transformation of this structure separated in time for both different cortical areas and different EEG frequency bands. These alterations show time lag from 2 to 3 years in children of native population compared to the newcomers. The revealed differences are assumed to reflect geno-phenotypical features of morpho-functional CNS development in children of the native and newcomers' population that depend on strong adaptation tension for extreme environmental conditions.