| Audiovisual contrast enhancement is articulated primarily via the M-pathway. | |
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MedLine Citation:
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PMID: 20940003 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Although it has been previously reported that audiovisual integration can modulate performance on some visual tasks, multisensory interactions have not been explicitly assessed in the context of different visual processing pathways. In the present study, we test auditory influences on visual processing employing a psychophysical paradigm that reveals distinct spatial contrast signatures of magnocellular and parvocellular visual pathways. We found that contrast thresholds are reduced when noninformative sounds are presented with transient, low-frequency Gabor patch stimuli and thus favor the M-system. In contrast, visual thresholds are unaffected by concurrent sounds when detection is primarily attributed to P-pathway processing. These results demonstrate that the visual detection enhancement resulting from multisensory integration is mainly articulated by the magnocellular system, which is most sensitive at low spatial frequencies. Such enhancement may subserve stimulus-driven processes including the orientation of spatial attention and fast, automatic ocular and motor responses. This dissociation helps explain discrepancies between the results of previous studies investigating visual enhancement by sounds. |
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Authors:
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Philip M Jaekl; Salvador Soto-Faraco |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-10-30 |
Journal Detail:
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Title: Brain research Volume: 1366 ISSN: 1872-6240 ISO Abbreviation: Brain Res. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-11-29 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0045503 Medline TA: Brain Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 85-92 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Centre for Brain and Cognition, Department of Information Technology and Communications, Universitat Pompeu Fabra, Roc Boronat 138, 08018 Barcelona, Spain. phil.jaekl@upf.edu |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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