[Spatial organization of the cortical electrical activity at different stages of visual set in children of preschool and junior school age].
Set-forming and set-shifting were studied in children of three age groups: five to six-, six to seven- and nine to ten-year-old. Set effect displayed itself in contrast illusions in most of the subjects (69 of 73). Age differences in set plasticity and in reaction time to a probe stimulus were revealed. Five to six-year-old children formed a more rigid set than older ones. According to EEG coherence function in theta- and alpha-bands and behavioral data, a hypothesis of two systems being involved in set-forming and set-shifting is proposed. These systems are: a fronto-talamic system of selective attention, and a system of cortico-hippocampal connections that are involved in cortical processing of novel visual information and in episodic memory. The age of 6-7 years is shown to be critical in forming a plastic type of cognitive set.
Kostandov
E A
EA
Farber
D A
DA
Cheremushkin
E A
EA
Machinskaia
R I
RI
Petrenko
N E
NE
Ashkinasi
M L
ML
D000367:Age Factors; D002540:Cerebral Cortex / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D012718:Set, Psychology; D013028:Space Perception / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*