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Electrophysiological analysis of hemispheric differences in noise tolerance

, : Electrophysiological analysis of hemispheric differences in noise tolerance. Fiziologiya Cheloveka 13(3): 355-362

The method of evoked potentials was used to analyze the effect of noise on hemispheric asymmetery in 6 women and 9 men presented signals along with interference. The noise weakened the hemispheric asymmetry of the amplitude parameters of long latency evoked potentials. More intensive suppressive effect was observed in the hemisphere which predominated with respect to the potential amplitude (the right hemisphere in the majority of the subjects). Differences between hemispheres decreased in mono-, as well as in dichotic presentation of signals and interference. Under the conditions of monotic stimulation, noise also decreased differences between ipsi- and contralateral potentials. Apparently, the more intensive suppressive effect of noise on the hemisphere predominating in a definite situation is determined by a higher level of its susceptibility, evoked by additional activation of the reticular formation of the brainstem.

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