[EEG spatial synchronization at different set stages in 8-year-old children with different levels of selective attention fronto-thalamic system maturity].
Visual cognitive set was studied in two groups of 8-year-old children: with normal development of fronto-thalamic system (FTS) (n = 21) and with functional immaturity of this system (n = 29). In most of the children with the FTS-immaturity a formed visual set was rigid. EEG was recorded from the frontal, central, temporal, parietal and occipital regions, and coherence function in theta-, alpha- and beta-bands was analyzed. The most vivid differences between two groups of children were revealed at the set actualization stage. If the set was a plastic one, the value of coherence function between frontal and dorsal areas was higher in children with FTS-immaturity, than in "normal" ones. In the group with FTS-immaturity the dependence of coherence function on the set's plasticity was more vivid, than in children without FTS-immaturity. In all children with a rigid set value of coherence function was higher during set formation, actualization and extinction, than at resting condition with eyes opened. In the group with FTS-immaturity the coherence of theta-band considerably increased at the set actualization stage, mainly in the right hemisphere. We consider this to be the evidence of a comparatively bigger role of cortico-hippocampal system and implicit episodic memory the set shifting. Probably these processes compensate the FTS-dysfunction and make a set more plastic.
Kostandov
E A
EA
Farber
D A
DA
Machinskaia
R I
RI
Cheremushkin
E A
EA
Petrenko
N E
NE
Ashkinazi
M L
ML
D001288:Attention / Q000502:physiology*; D002648:Child; D002657:Child Development; D003344:Cortical Synchronization; D004569:Electroencephalography; D005625:Frontal Lobe / Q000502:physiology*; D006801:Humans; D013788:Thalamus / Q000502:physiology*