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[Pathogenesis of central mechanisms of speech function disorders in children with alalia].

A study of special synchronization of brain biopotentials in EEG registrations by a correlational analysis permitted to establish that in children with alalia there was a complex defect in intercentral relations of the associative infraparietal areas with auditory, visual and motor analyzers in the left hemisphere. In children with alalia the intercentral correlations of biopotentials of the parieto-temporal areas were 10 times less, in the parieto-occipital ares 3 times less and almost twice less in the parieto-motor areas in the left hemisphere in comparison with norman children. Consequently disturbed speech development in children with alalia is connected with a defect in the functions of the higher sensory analysis and synthesis in the associative infraparietal areas with disturbed activity in the synchronizing, activating brain systems with disorders in the organization of spacial-time relations in different cortical areas.