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  Early decreases in alpha and gamma band power distinguish linguistic from visual information during spoken sentence comprehension

Willems, R. M., Oostenveld, R., & Hagoort, P. (2008). Early decreases in alpha and gamma band power distinguish linguistic from visual information during spoken sentence comprehension. Brain Research, 1219, 78-90. doi:10.1016/j.brainres.2008.04.065.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-1F46-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-5876-2
Genre: Journal Article

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 Creators:
Willems, Roel M.1, Author              
Oostenveld, Robert2, 3, Author              
Hagoort, Peter1, 2, 3, Author              
Affiliations:
1FC Donders Centre for Cognitive Neuroimaging, external, ou_55235              
2Neurobiology of Language Group, MPI for Psycholinguistics, Max Planck Society, Nijmegen, NL, ou_102880              
3Unification, MPI for Psycholinguistics, Max Planck Society, ou_55219              

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 Abstract: Language is often perceived together with visual information. This raises the question on how the brain integrates information conveyed in visual and/or linguistic format during spoken language comprehension. In this study we investigated the dynamics of semantic integration of visual and linguistic information by means of time-frequency analysis of the EEG signal. A modified version of the N400 paradigm with either a word or a picture of an object being semantically incongruous with respect to the preceding sentence context was employed. Event-Related Potential (ERP) analysis showed qualitatively similar N400 effects for integration of either word or picture. Time-frequency analysis revealed early specific decreases in alpha and gamma band power for linguistic and visual information respectively. We argue that these reflect a rapid context-based analysis of acoustic (word) or visual (picture) form information. We conclude that although full semantic integration of linguistic and visual information occurs through a common mechanism, early differences in oscillations in specific frequency bands reflect the format of the incoming information and, importantly, an early context-based detection of its congruity with respect to the preceding language context

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Language(s): eng - English
 Dates: 2008
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: eDoc: 391607
DOI: 10.1016/j.brainres.2008.04.065
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Title: Brain Research
Source Genre: Journal
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Pages: - Volume / Issue: 1219 Sequence Number: - Start / End Page: 78 - 90 Identifier: -