title: Influence of simple verbal and non-verbal stimuli on brain electrical activity.
abstract: In this study, the influence of analysis stimulus content on the reaction time (RT) and parameters of the brain activity was investigated. Thirty healthy right-handed volunteers (mean age 24 years) participated in the study. The dynamics of RT, characteristics of electroencephalogram (EEG) and event-related potentials (ERP) components during perception of digits and non-verbal stimuli were analyzed. The specificity of RT's asymmetry in simple and complex visual-motor reactions depended on stimulus type was revealed. The similarity of early ERP components (peak latency of 100-200 ms) for both stimuli types in simple and complex visual-motor reaction was shown. We also described the formation of specific ERP configuration for digits differentiation such as a left-sided asymmetry of component N200, and increase of peak latency of the late negative component with their extension to the parietal region.
authors.affiliation: Biology Department, Southern Federal University, 105, Bolshaya Sadovaya st., Rostov-on-Don, 344006, Russian Federation. aek@mis.sfedu.ru
authors.forename: Eugeny K
authors.initials: EK
authors.lastname: Aydarkin
authors.forename: Anna S
authors.initials: AS
authors.lastname: Bogun
mesh_terms: D000328:Adult; D001921:Brain / Q000033:anatomy & histology / Q000502:physiology*; D001931:Brain Mapping; D003071:Cognition / Q000502:physiology; D004569:Electroencephalography / Q000379:methods; D018913:Event-Related Potentials, P300 / Q000502:physiology; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D008433:Mathematics; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000502:physiology; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D013997:Time Factors; D014705:Verbal Behavior / Q000502:physiology*; D055815:Young Adult