[Spectral analytical study on the developmental properties of EEG in children: Generalized and localized components of EEG spectra in the normal and the mentally retarded children (author's transl)].

The purpose of the present study was to elucidate the developmental properties of EEG in the normal and the mentally retarded children through regional differences and regional regional interrelationships. The localized components appearing at 1 or 2 regions tended to show low coherences in relation to the occipital region. The generalized component, observed over all regions, indicated lower coherences in the theta component than in the alpha one. It may be inferred that the theta component shown in the developing children may be differenciated from the component around 10 Hz.