Spatial relations of electrical activity during recall of verbal signals in children.

Abstract

1. Investigation of intercentral correlations of brain potentials in children aged 5–6 years showed substantial differences in the spatial distribution of correlations between projection and association areas during the recall of familiar and unfamiliar words. 2. During the recall of verbal stimuli the following interhemispheric features of distribution of correlations between biopotentials were revealed in the EEG of the children: Familiar words evoked the strongest increase in spatial synchronization of cortical biopotentials between zones of the left hemisphere, and unfamiliar words between zones of the right hemisphere. 3. During the recall of familiar words, the first place for the number of strong and very strong correlations between biopotentials was occupied by the inferior parietal association area of the dominant hemisphere, whereas during the recall of unfamiliar words, it was occupied by the motor projection area of the nondominant hemisphere. 4. The recall of familiar words evoked the greatest strengthening of correlations between biopotentials of the anterior and posterior association structures with the motor and auditory projection areas in the left hemisphere, whereas the recall of unfamiliar words led to increased strength of correlation between the motor projection area, on the one hand, and the temporal and anterior (frontal and speech) association areas in the right hemisphere.