抄録
The developmental changes of occipital EEGs were investigated through follow-up recordings of 13 normal children. Their ages were from 6 to 10 years when the first EEG recording was made. Each follow-up recording lasted about 5 years. On these occipital EEGs an auto-power spectrum analysis was made. Of the 13 subjects there were 7 subjects who showed a single alpha component and 6 subjects who showed multiple peaks in θ and α bands. It was found that with the advancement of age the components which appeared at low frequencies among the multiple peaks diminished in power and disappeared, whereas the component of the highest frequency showed a gradual increase in peak frequency. The single α component also increased in its peak frequency with age. Thus, many components which exhibited distinct chronological changes were found in children's occipital EEGs. It was postulated that different maturational processes of the brain may be responsible for these changes.
