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[Cortical positive potentials in the period of eye fixation prior to saccades and antisaccades].

The EEG of 10 right-handed healthy subjects preceding saccade and antisaccade with mean values of latency in the eye fixations period were selected and averaged. The positive potential P2 appearing on the fixation stimuly switching on and slow positive wave following after it were more prominent before antisaccades than normal saccades. Space-temporal analyses of presaccadic potentials showed that right frontal cortex was activated more before antisaccades. These findings suggest that right cortical hemisphere dominate in spatial attention and inhibition of automatic saccades to visual stimuli in the period of antisaccades preparing. During the period of central fixations "intermediate" positivity potentials, developing in 600-400 ms prior to saccade or antisaccade onset, were find out. These potentials were predominantly recorded in the left frontal and frontosagittal cortical areas. The obtained evidence suggest that "intermediate" positive potentials a period related to the process of motor attention, anticipation and decision making in the period of eyes fixation.