Early, low-level auditory-somatosensory multisensory interactions impact reaction time speed.

Détails

Ressource 1Télécharger: BIB_FAD660B7B99F.P001.pdf (1796.32 [Ko])
Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_FAD660B7B99F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Early, low-level auditory-somatosensory multisensory interactions impact reaction time speed.
Périodique
Frontiers in Integrative Neuroscience
Auteur(s)
Sperdin H.F., Cappe C., Foxe J.J., Murray M.M.
ISSN
1662-5145 (Electronic)
ISSN-L
1662-5145
Statut éditorial
Publié
Date de publication
2009
Volume
3
Numéro
2
Pages
1-10
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish. Document Type: Journal Article. Type de document: ORIGINAL RESEARCH ARTICLE.
Résumé
Several lines of research have documented early-latency non-linear response interactions between audition and touch in humans and non-human primates. That these effects have been obtained under anesthesia, passive stimulation, as well as speeded reaction time tasks would suggest that some multisensory effects are not directly influencing behavioral outcome. We investigated whether the initial non-linear neural response interactions have a direct bearing on the speed of reaction times. Electrical neuroimaging analyses were applied to event-related potentials in response to auditory, somatosensory, or simultaneous auditory-somatosensory multisensory stimulation that were in turn averaged according to trials leading to fast and slow reaction times (using a median split of individual subject data for each experimental condition). Responses to multisensory stimulus pairs were contrasted with each unisensory response as well as summed responses from the constituent unisensory conditions. Behavioral analyses indicated that neural response interactions were only implicated in the case of trials producing fast reaction times, as evidenced by facilitation in excess of probability summation. In agreement, supra-additive non-linear neural response interactions between multisensory and the sum of the constituent unisensory stimuli were evident over the 40-84 ms post-stimulus period only when reaction times were fast, whereas subsequent effects (86-128 ms) were observed independently of reaction time speed. Distributed source estimations further revealed that these earlier effects followed from supra-additive modulation of activity within posterior superior temporal cortices. These results indicate the behavioral relevance of early multisensory phenomena.
Pubmed
Open Access
Oui
Création de la notice
12/02/2013 16:18
Dernière modification de la notice
09/05/2019 3:48
Données d'usage