Cerebral bioelectric activity and dermatoglyphics constitutions of teenagers time-lagged psychical development

Abstract

Analysis of the parameters of electroencephalogram in adolescents of the city of Lermontov, Stavropol territory found that slow "fundamental" theta rhythm dominating in adolescents with mental retardation and is caused by the activation of cortical projections to the thalamus, leads to a decrease in functional activity of neurons in the brain, emotional-motivational tension and negative emotions. The high level of activity of neurons of the anterior and central parts of the brain in high frequency rhythm beta-2 band, which correlates with the level of activation by dopamine and serotonin, characterizes the delay of psychomotor development for both boys and girls with mental retardation. Described a peculiar dermatoglyphics constitution adolescents, phenotypically manifests itself in delayed mental development of maximum representation of radial loops among boys, increase in ridge accounts and the Delta index in girls. Neurophysiological adolescents with mental retardation are characterized by a uniform decrease in functional activity of neurons and emotional-motivational tension, dermatoglyphics boys characterizes the presence of rarely occurring patterns: radial loop, girls - increase in ridge density of the fingers of the right and left hands.