Evidence of a visual-to-auditory cross-modal sensory gating phenomenon as reflected by the human P50 event-related brain potential modulation - Archive ouverte HAL
Article Dans Une Revue Neuroscience Letters Année : 2003

Evidence of a visual-to-auditory cross-modal sensory gating phenomenon as reflected by the human P50 event-related brain potential modulation

R Lebib
  • Fonction : Auteur
S De Bode
  • Fonction : Auteur
Pm Baudonniere
  • Fonction : Auteur

Résumé

We investigated the existence of a cross-modal sensory gating reflected by the modulation of an early electrophysiological index, the P50 component. We analyzed event-related brain potentials elicited by audiovisual speech stimuli manipulated along two dimensions: congruency and discriminability. The results showed that the P50 was attenuated when visual and auditory speech information were redundant (i.e. congruent), in comparison with this same event-related potential component elicited with discrepant audiovisual dubbing. When hard to discriminate, however, bimodal incongruent speech stimuli elicited a similar pattern of P50 attenuation. We concluded to the existence of a visual-to-auditory cross-modal sensory gating phenomenon. These results corroborate previous findings revealing a very early audiovisual interaction during speech perception. Finally, we postulated that the sensory gating system included a cross-modal dimension. (C) 2003 Elsevier Science Ireland Ltd. All rights reserved.

Domaines

Psychologie

Dates et versions

hal-01441343 , version 1 (19-01-2017)

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Citer

R Lebib, D Papo, S De Bode, Pm Baudonniere. Evidence of a visual-to-auditory cross-modal sensory gating phenomenon as reflected by the human P50 event-related brain potential modulation. Neuroscience Letters, 2003, 341 (3), pp.185-188. ⟨10.1016/S0304-3940(03)00131-9⟩. ⟨hal-01441343⟩

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