Features of Bioelectric Activity of the Cerebral Cortex and Thinking Disorders in Children with Various Borderline Disorders of Residual Organic Genesis

The article presents the results of a study of the features of cognitive function and bioelectric activity cerebral cortex in children with borderline mental disorders of residually organic genesis. 80 children participated with the following diagnoses: organic emotionally labile [asthenic] disorder [F 06.06]; inorganic enuresis [F 98.0], encopresis [F 98.1], stereotypical motor disorders [F 98.4], other specified emotional and behavioral disorders with onset usually occurring in childhood [F 98.8]. The features of bioelectric activity of the cerebral cortex, the ability to spatial analysis and synthesis, arithmetic counting, assimilation of logical and grammatical structures, the presence of viscosity, detail and diversity intellectual activity were studied in children. Data of electroencephalographic examinations were compared with the results of psychodiagnostic methods using the methods of mathematical statistics. Differences of bioelectric activity and features of thinking in children were investigated depending on features of boundary disorder. It is shown that on the background of asthenization more pronounced cognitive impairment is observed. Children with asthenic disorders [06.06] have the largest scatter of data than patients with enuresis [F98.0], encopresis [F 98.1], stereotypical movement disorders [F 98.4], disorders of behavior [F 98.8]. At the same time, on average, they have the most significant violations of thinking, what happens against the background of increasing spectral power of low-frequency activity of delta and theta rhythms in general, as well as of delta rhythm in the frontal part of the brain. Increase of low-frequency activity in the frontal lobes of both hemispheres leads to more pronounced disorders of thinking, than similar changes in the temporal, parietal, occipital regions of the right hemisphere and speech zones of the left hemisphere. In the first case, they are manifested in violations of spatial analysis and synthesis, viscosity, detail and diversity of thinking, as well as in difficulties in the semantic and symbolic activity, in the assimilation of logical and grammatical structures and arithmetic. In the second case — only in violations of spatial analysis and synthesis, viscosity, detail and diversity of thinking.

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