Document Detail

Syntactic unification operations are reflected in oscillatory dynamics during on-line sentence comprehension.
MedLine Citation:
PMID:  19580386     Owner:  NLM     Status:  MEDLINE    
There is growing evidence suggesting that synchronization changes in the oscillatory neuronal dynamics in the EEG or MEG reflect the transient coupling and uncoupling of functional networks related to different aspects of language comprehension. In this work, we examine how sentence-level syntactic unification operations are reflected in the oscillatory dynamics of the MEG. Participants read sentences that were either correct, contained a word category violation, or were constituted of random word sequences devoid of syntactic structure. A time-frequency analysis of MEG power changes revealed three types of effects. The first type of effect was related to the detection of a (word category) violation in a syntactically structured sentence, and was found in the alpha and gamma frequency bands. A second type of effect was maximally sensitive to the syntactic manipulations: A linear increase in beta power across the sentence was present for correct sentences, was disrupted upon the occurrence of a word category violation, and was absent in syntactically unstructured random word sequences. We therefore relate this effect to syntactic unification operations. Thirdly, we observed a linear increase in theta power across the sentence for all syntactically structured sentences. The effects are tentatively related to the building of a working memory trace of the linguistic input. In conclusion, the data seem to suggest that syntactic unification is reflected by neuronal synchronization in the lower-beta frequency band.
Marcel Bastiaansen; Lilla Magyari; Peter Hagoort
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of cognitive neuroscience     Volume:  22     ISSN:  1530-8898     ISO Abbreviation:  J Cogn Neurosci     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-04-06     Completed Date:  2010-08-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8910747     Medline TA:  J Cogn Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1333-47     Citation Subset:  IM    
Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands.
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MeSH Terms
Beta Rhythm / psychology*
Brain / physiology*
Comprehension / physiology*
Neurons / physiology*

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