| Cross-modal enhancement of the MMN to speech-sounds indicates early and automatic integration of letters and speech-sounds. | |
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MedLine Citation:
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PMID: 18023979 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Recently brain imaging evidence indicated that letter/speech-sound integration, necessary for establishing fluent reading, takes place in auditory association areas and that the integration is influenced by stimulus onset asynchrony (SOA) between the letter and the speech-sound. In the present study, we used a specific ERP measure known for its automatic character, the mismatch negativity (MMN), to investigate the time course and automaticity of letter/speech-sound integration. We studied the effect of visual letters and SOA on the MMN elicited by a deviant speech-sound. We found a clear enhancement of the MMN by simultaneously presenting a letter, but without changing the auditory stimulation. This enhancement diminishes linearly with increasing SOA. These results suggest that letters and speech-sounds are processed as compound stimuli early and automatically in the auditory association cortex of fluent readers and that this processing is strongly dependent on timing. |
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Authors:
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Dries Froyen; Nienke Van Atteveldt; Milene Bonte; Leo Blomert |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-10-25 |
Journal Detail:
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Title: Neuroscience letters Volume: 430 ISSN: 0304-3940 ISO Abbreviation: Neurosci. Lett. Publication Date: 2008 Jan |
Date Detail:
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Created Date: 2008-01-09 Completed Date: 2008-04-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7600130 Medline TA: Neurosci Lett Country: Ireland |
Other Details:
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Languages: eng Pagination: 23-8 Citation Subset: IM |
Affiliation:
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Department of Cognitive Neuroscience, Faculty of Psychology, University of Maastricht, Maastricht Brain Imaging Center, Maastricht, The Netherlands. d.froyen@psychology.unimaas.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Brain / physiology* Electroencephalography Evoked Potentials / physiology Female Humans Male Phonetics* Reading Speech Perception / physiology* Visual Perception / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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