[Spectral power of theta and alpha EEG-bands in preschool children with different level of set plasticity].
Spectral power of theta and alpha EEG-bands at different stages of visual set was studied in 5-7-year-old children. Children with a plastic set had greater alpha-band spectral power values than children with a rigid set. At set formation stage children with a rigid set displayed an increase of theta-band EEG-power, which is a manifestation of "immature" arousal reaction. Children with a plastic set displayed at set formation stage an increase of alpha-band spectral power in bilateral occipital brain areas. Dynamics of EEG spectral power differed in children before and after 6 years of age. At set formation stage 5-6-year-olds displayed an above-mentioned "immature" arousal reaction, and 6-7-year-olds--an increase of alpha-band spectral power in occipital brain areas. At set actualization stage 6-7-year-olds displayed an increase of alpha-band spectral power in right posterior brain areas. At set extinction in this group a bilateral decrease of alpha-band spectral power in mid-frontal areas was observed. An importance for a quick set-shifting of certain brain areas' involvement in the process of visual perception is discussed.
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Ashkinazi
D000513:Alpha Rhythm / Q000502:physiology*; D001143:Arousal / Q000502:physiology*; D001611:Beta Rhythm / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D009778:Occipital Lobe / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*