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N A Kavshbaia

Publications and source records attributed to N A Kavshbaia.

4 recordsLinked to original sources
PubMed2002

[Activation of the human cortex during visual attention and selection].

Cortical activation in visual discrimination tasks was estimated by measurement of the CNV (contingent negative variation) and N1-P3 components of visual ERPs in frontal, parietal, occipital and temporal leads recorded in 18 young healthy adults. In all investigated tasks, the maximal values of CNV and ERPa were observed in parietal regions. The estimation of cortical readiness state (CNV) is quite a useful procedure in the attention tasks because amplitude and stability of ERPs depend on preceding cortical excitability. The prevalence of parietal activation in visual attention tasks may be considered as the dominance of occipito-parietal way (stream) in human visual attention system.

Adult↗
PubMed2001

[Correlation of spatial EEG synchronization with verbal-logical and visual-spatial abilities in humans].

The EEG was recorded from five monopolar leads: a spontaneous one as well as the EEG during verbal-logical or visual-spatial tests, in humans. The subjects with prevailing visual-spatial abilities had a spontaneous EEG with a low intercorrelation between the hemispheres and a higher level of the EEG synchronisation in parietal-occipital areas as compared with the frontal those, whereas subjects with prevailing verbal abilities had an inverse correlation of the above EEG parameters. The parameters' interrelationships in subjects' spontaneous EEG seem to reflect an individual and specific character of cerebral neurodynamics suggesting a negative correlation between the verbal-logical and visual-spatial abilities in humans.

Adult↗
PubMed1997

[The effect of sex on the spatial synchronization of the EEG].

The data obtained shows that women are characterised by a significantly larger interindividual variations of the EEG synchronizing than men (except the synchronizing in the left hemisphere). The findings are supposed to be due to a higher level of unspecific cortical activation in men.

Adolescent↗