Recalibration of auditory space following milliseconds of crossmodal discrepancy
Identifieur interne : 001962 ( Ncbi/Curation ); précédent : 001961; suivant : 001963Recalibration of auditory space following milliseconds of crossmodal discrepancy
Auteurs : David R. Wozny [États-Unis] ; Ladan Shams [États-Unis]Source :
- The Journal of neuroscience : the official journal of the Society for Neuroscience [ 0270-6474 ] ; 2011.
Abstract
Basic features of objects and events in the environment such as timing and spatial location are encoded by multiple sensory modalities. This redundancy in sensory coding allows recalibration of one sense by other senses if there is a conflict between the sensory maps (
Url:
DOI: 10.1523/JNEUROSCI.6079-10.2011
PubMed: 21430160
PubMed Central: 3071751
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David R. Wozny<affiliation><nlm:aff id="A1">Max Planck Institute for Human Cognitive and Brain Sciences, Stephanstrasse 1a, Leipzig, Germany 04103</nlm:aff>
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<affiliation wicri:level="2"><nlm:aff id="A3">Biomedical Engineering IDP, University of California, Los Angeles, 5121 Engineering V, School of Engineering and Applied Science, Los Angeles, CA 90095</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<placeName><region type="state">Californie</region>
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<front><div type="abstract" xml:lang="en"><p id="P1">Basic features of objects and events in the environment such as timing and spatial location are encoded by multiple sensory modalities. This redundancy in sensory coding allows recalibration of one sense by other senses if there is a conflict between the sensory maps (<xref ref-type="bibr" rid="R16">Radeau and Bertelson, 1974</xref>
; <xref ref-type="bibr" rid="R24">Zwiers et al., 2003</xref>
; <xref ref-type="bibr" rid="R15">Navarra et al., 2009</xref>
). In contrast to motor or sensori-motor adaptation which can be relatively rapid, cross-sensory recalibration (the change in an <italic>isolated</italic>
sensory representation after exposure to conflicting crossmodal information) has been reported only as a result of extensive amount of exposure to sensory discrepancy (e.g., hundreds or thousands of trials, or prolonged durations). Therefore, sensory recalibration has traditionally been associated with compensation for permanent changes that would occur during development or after traumatic injuries or stroke. Nonetheless, the dynamics of sensory recalibration is unknown, and it is unclear whether prolonged inconsistency is required to trigger recalibration or whether such mechanisms are continuously engaged in self-maintenance. We show that in humans recalibration of perceived auditory space by vision can occur after a single exposure to discrepant auditory-visual stimuli lasting only a few milliseconds. These findings suggest an impressive degree of plasticity in a basic perceptual map induced by a crossmodal error signal. Therefore, it appears that modification of sensory maps does not necessarily require accumulation of substantial amount of evidence of error to be triggered, and is continuously operational. This scheme of sensory recalibration has many advantages. It only requires a small working memory capacity, and allows rapid adaptation to transient changes in the environment as well as the body.</p>
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