Abstract
Neurophysiological mechanisms of recognition of verbal and nonverbal stimuli have been studied. It was determined that subjects solved nonverbal tasks faster and more effectively with their left hands, while they used two strategies of recognition to solve verbal tasks (fast reactions with right and left hand). Analysis of spectral characteristics of EEG revealed that mechanisms of both anterior and posterior attention systems were simultaneously involved in the process of effective recognition of nonverbal stimuli and ineffective recognition of verbal stimuli. Analysis of the event-related potentials (ERPs) showed that ineffective recognition of verbal and nonverbal stimuli resulted in an increase in the amplitude of sensory components of ERPs (N1m, P1m), while effective recognition increased the amplitude of cognitive components of ERPs (P2m, P3m).
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