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.
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