Abstract
Auditory evoked potentials (AEPs) were studied from scalp locations Cz and Oz on 37 adults aged 20–22 years during sensori-sensorial association of a weak sound (S) and a strong flash of light (L). After sound alone repetition (habituation), S-L association modified AEP: first, it caused a generalized orienting response expressed as increasing of Cz and Oz amplitude AEPs. Then, this pattern gave way to an activation limited to the Oz lead: the increase of amplitude was then concomitant with shortened latencies when compared to sound-alone-habituated responses. Inter-individual differences were observed since these occipital modifications were recorded only on 26 subjects. The other 11 subjects did not exhibit any occipital modifications following S-L association. For them, the main modification was a strong decrease of Cz AEP induced by S-L association.
These two groups also differed in their capacity to ignore irrelevent stimuli which is higher in the first group (AEP amplitude habituation with sound-alone repetition) than in the second one (no AEP habituation).
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This study was supported by grants from INSERM n° 859014, Fondation pour la Recherche Médicale, Fondation H. Langlois, Séurité Sociale and Conseil Régional de la Région Centre.
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Bruneau, N., Roux, S., Garreau, B. et al. Cortical evoked potentials as indicators of auditory-visual cross-modal association in young adults. Pav. J. Biol. Sci. 25, 201–206 (1990). https://doi.org/10.1007/BF02900703
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DOI: https://doi.org/10.1007/BF02900703