Utilization of factor analysis for the evaluation of ontogenetic and functional changes in the electrical activity of...

The tendency of the index, amplitude and its dispersion during the year is opposite to the age-dependent tendency of changes in these indices and points to a chronic component of mental fatigue. It is very important that in the second half of the school year the dispersion of the EEG amplitude increases in all sections of the brain and in all frequency ranges: an increase in EEG amplitude dispersion in parallel with an increase in the amplitude itself indicates that the process of synchronization and the ultraliminal inhibition connected with it in different sections of the brain and in various frequency ranges of the EEG is not stagnant or inert but mobile and instable and can therefore be relatively easily removed by special hygienic measures. As an example of the latter we can mention the use of a special regime of exercise (Yu. M. Pratusevich et al., 1975), addition of supplementary factors of nutrition to the diet of the time the children spend in the fresh air engaging in outdoor games (Yu. M. Pratusevich, 1964).