Electrophysiological comparison of grammatical processing and semantic processing of single spoken nouns.

Détails

ID Serval
serval:BIB_AF3440045544
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Electrophysiological comparison of grammatical processing and semantic processing of single spoken nouns.
Périodique
Brain Research. Cognitive Brain Research
Auteur(s)
Thierry G., Cardebat D., Démonet J.F.
ISSN
0926-6410 (Print)
ISSN-L
0926-6410
Statut éditorial
Publié
Date de publication
2003
Peer-reviewed
Oui
Volume
17
Numéro
3
Pages
535-547
Langue
anglais
Notes
Publication types: Comparative Study ; Journal ArticlePublication Status: ppublish. PDF type: Research report
Résumé
Access to meaning from speech input is a high-speed process. However, models of word comprehension stipulate that words must be analyzed at phonological, grammatical and semantic levels. Here we used event-related potentials (ERPs) to compare on-line semantic categorization (natural/manufactured) and grammatical gender categorization (masculine/feminine) of spoken monosyllabic French noun pairs. Twenty four native French speakers were instructed to spot pairs of nouns in which both stimuli pertained to a category specified prior to each block. They could make a decision either after processing the first noun (i.e., ignore the second, Release condition), or after processing both (Hold condition). Virtually identical N4 components affecting Hold and Release ERPs in relation to category expectations were elicited by the first noun in both the tasks. Their topography was intermediary between that of the N400 and that of the Left Anterior Negativity. Despite shorter Release reaction times (RTs) for gender decisions than semantic ones, Release and Hold ERPs diverged 84 ms earlier in the semantic context than in the gender context, indicating faster onset for the processing of meaning. Conversely, the offset of Hold/Release differences was observed 42 ms earlier in the gender task than in the semantic task, suggesting an earlier completion for gender categorization. In sum, electrophysiological differences induced by semantic operations commenced earlier but recovered later than those relating to grammatical gender analysis. In convergence with previous Lateralized Readiness Potential and N200 studies, our results suggest that conscious semantic access can precede access to other types of lexical information during word comprehension in highly controlled conditions.
Mots-clé
Adult, Brain/physiology, Electroencephalography, Electrophysiology, Evoked Potentials/physiology, Female, Humans, Language, Male, Semantics, Speech Perception/physiology
Pubmed
Web of science
Création de la notice
24/03/2013 19:37
Dernière modification de la notice
20/08/2019 16:18
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