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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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The "double step" scheme of visual stimulation have been used to investigate the cortical mechanisms of attention and decision making in human. The slowing of sensory-motor integration as inhibitory effect of involuntary automatic shift of attention to the second stimulus in the early stages of visual perception was shown. Analysis of saccade latency and ERP components showed that the pattern of saccade response (two or one saccades) depends on the completeness of decision making stages at programming of the first saccade before the moment of second stimulus switch on. Comparison of the amplitude and topography of ERP component P100 in the case of double saccade response and P200 in the case of a single saccade to the second stimulus with their premotor analogue P -100, allow us to consider these potentials as a markers of decision making stage in saccade programming. The influence of the motor readiness level and directed attention orientation in the period of eye fixation and stimuli expectation to the “pattern” of saccadic response, regardless of visual targets location, was reflected in the amplitude and topography of slow negative components such as CNV. The obtained data suggest that brain basis of attention and decision-making interaction may serve the frontal - parietal network of saccade control and related with it frontal–medial-thalamic and thalamo–medial-parietal systems of selective attention with predominance of «top-down» mechanisms