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  Lexical memory search during N400: Cortical couplings in auditory comprehension

Supp, G. G., Schlögl, A., Gunter, T. C., Bernard, M., Pfurtscheller, G., & Petsche, H. (2004). Lexical memory search during N400: Cortical couplings in auditory comprehension. NeuroReport, 15(7), 1209-1213. doi:10.1097/01.wnr.0000126219.25235.¡.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-C3C6-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-2830-B
Genre: Journal Article

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supp.pdf (Publisher version), 148KB
 
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 Creators:
Supp, Gernot G.1, Author              
Schlögl, Alois, Author
Gunter, Thomas C.1, Author              
Bernard, M., Author
Pfurtscheller, Gert, Author
Petsche, Hellmuth, Author
Affiliations:
1Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              

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Free keywords: Coupling; Electroencephalography (EEG); Language comprehension; Multivariate autoregressive model (MVAR); N400; Partial directed coherence (PDC); Semantic memory; Semantic processing; Spoken words; Synchrony
 Abstract: In this study, we applied partial-directed EEG-coherence analysis to assess regional changes in neuronal couplings and information transfer related to semantic processing. We tested the hypothesis whether (and which) processing differences between spoken words and pseudowords are reflected by changes in cortical networks within the time window of a specific event related potential (ERP) component, the N400. Fourteen native speaking German subjects performed a lexical decision paradigm, while being confronted sequentially with two-syllabic nouns and phonologically legal pseudowords. Using ERP analysis, we defined the time window of the N400 effect, known to reflect semantic processing, and, subsequently, we examined the coupling differences. Lexico-semantic memory search appears to be subserved by a network between temporal, parietal and frontal areas, particularly restricted to the left hemisphere.

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Language(s): eng - English
 Dates: 2004
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: eDoc: 239214
Other: P6743
DOI: 10.1097/01.wnr.0000126219.25235.¡
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Title: NeuroReport
Source Genre: Journal
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Publ. Info: Oxford, UK : Rapid Communications of Oxford Ltd.
Pages: - Volume / Issue: 15 (7) Sequence Number: - Start / End Page: 1209 - 1213 Identifier: ISSN: 0959-4965
CoNE: /journals/resource/954925578070