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  Syntactic processing modulates the θ rhythm of the human EEG

Bastiaansen, M. C. M., Van Berkum, J. J. A., & Hagoort, P. (2002). Syntactic processing modulates the θ rhythm of the human EEG. NeuroImage, 17, 1479-1492. doi:10.1006/nimg.2002.1275.

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 Creators:
Bastiaansen, Marcel C. M.1, 2, Author              
Van Berkum, Jos J. A.1, 2, 3, Author              
Hagoort, Peter1, 2, Author              
Affiliations:
1Neurocognition of Language Processing, MPI for Psycholinguistics, Max Planck Society, ou_55225              
2FC Donders Centre for Cognitive Neuroimaging , External Organizations, ou_55235              
3Department of Psychology, University of Amsterdam, Amsterdam, The Netherlands

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 Abstract: Changes in oscillatory brain dynamics can be studied by means of induced band power (IBP) analyses, which quantify event-related changes in amplitude of frequency-specific EEG rhythms. Such analyses capture EEG phenomena that are not part of traditional event-related potential measures. The present study investigated whether IBP changes in the δ, θ, and α frequency ranges are sensitive to syntactic violations in sentences. Subjects read sentences that either were correct or contained a syntactic violation. The violations were either grammatical gender agreement violations, where a prenominal adjective was not appropriately inflected for the head noun's gender, or number agreement violations, in which a plural quantifier was combined with a singular head noun. IBP changes of the concurrently measured EEG were computed in five frequency bands of 2-Hz width, individually adjusted on the basis of subjects' α peak, ranging approximately from 2 to 12 Hz. Words constituting a syntactic violation elicited larger increases in θ power than the same words in a correct sentence context, in an interval of 300–500 ms after word onset. Of all the frequency bands studied, this was true for the θ frequency band only. The scalp topography of this effect was different for different violations: following number violations a left-hemispheric dominance was found, whereas gender violations elicited a right-hemisphere dominance of the θ power increase. Possible interpretations of this effect are considered in closing.

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: eDoc: 25834
DOI: 10.1006/nimg.2002.1275
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Title: NeuroImage
Source Genre: Journal
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Pages: - Volume / Issue: 17 Sequence Number: - Start / End Page: 1479 - 1492 Identifier: -