[EEG of 6-7-year-old children during formation of a complex motor-visual habit].

Correlations between cortical biopotentials were determined in six- to seven-year old children during the formation of a complex motor-visual habit, namely the assembly of a dismountable toy. Assembling activity intensifies the spatial synchronization of biopotentials. Localization of the site of greatest activity is connected with the techniques of assembling the toy: in stereotype activity the site is localized in the inferior parietal areas, and in the case of variable activity, in the anterior parts of the cortex. As the habit is stabilized, the number of interhemispheric correlations increases, which testifies to the enhancement of the paired function of the cerebral hemispheres. The topography of these correlations differs. When the task is fulfilled in a stereotype way, the left motor and the right inferior parietal areas are most closely interrelated; in the case of a variable fulfilment the closest interconnection takes place between the left motor and right frontal areas.