Auditory-somatosensory multisensory interactions in humans: dissociating detection and spatial discrimination.

Détails

ID Serval
serval:BIB_F90BDB054707
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Auditory-somatosensory multisensory interactions in humans: dissociating detection and spatial discrimination.
Périodique
Neuropsychologia
Auteur(s)
Sperdin Holger F., Cappe C., Murray M.M.
ISSN
1873-3514[electronic], 0028-3932[linking]
Statut éditorial
Publié
Date de publication
2010
Volume
48
Numéro
13
Pages
3696-3705
Langue
anglais
Résumé
Simple reaction times (RTs) to auditory-somatosensory (AS) multisensory stimuli are facilitated over their unisensory counterparts both when stimuli are delivered to the same location and when separated. In two experiments we addressed the possibility that top-down and/or task-related influences can dynamically impact the spatial representations mediating these effects and the extent to which multisensory facilitation will be observed. Participants performed a simple detection task in response to auditory, somatosensory, or simultaneous AS stimuli that in turn were either spatially aligned or misaligned by lateralizing the stimuli. Additionally, we also informed the participants that they would be retrogradely queried (one-third of trials) regarding the side where a given stimulus in a given sensory modality was presented. In this way, we sought to have participants attending to all possible spatial locations and sensory modalities, while nonetheless having them perform a simple detection task. Experiment 1 provided no cues prior to stimulus delivery. Experiment 2 included spatially uninformative cues (50% of trials). In both experiments, multisensory conditions significantly facilitated detection RTs with no evidence for differences according to spatial alignment (though general benefits of cuing were observed in Experiment 2). Facilitated detection occurs even when attending to spatial information. Performance with probes, quantified using sensitivity (d'), was impaired following multisensory trials in general and significantly more so following misaligned multisensory trials. This indicates that spatial information is not available, despite being task-relevant. The collective results support a model wherein early AS interactions may result in a loss of spatial acuity for unisensory information.
Pubmed
Web of science
Création de la notice
20/01/2011 10:52
Dernière modification de la notice
03/03/2018 22:53
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