Titre
Processing of semantic categorical and associative relations: an ERP mapping study.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Khateb, A.
Auteure/Auteur
Michel, C.M.
Auteure/Auteur
Pegna, A.J.
Auteure/Auteur
O'Dochartaigh, S.D.
Auteure/Auteur
Landis, T.
Auteure/Auteur
Annoni, J.M.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
0167-8760
Statut éditorial
Publié
Date de publication
2003
Volume
49
Numéro
1
Première page
41
Dernière page/numéro d’article
55
Peer-reviewed
Oui
Langue
anglais
Notes
Journal Article Research Support, Non-U.S. Gov't --- Old month value: Jul
Résumé
Brain imaging studies have repeatedly shown a dominant involvement of the left hemisphere (LH) in the processing of semantic information. However, some behavioural studies have suggested that the right hemisphere (RH) also processes lexico-semantic information although in a qualitatively different way. More specifically, it has been proposed that the LH shows a greater sensitivity to categorical (CR, or intraconceptual) relationships, while the RH appears more sensitive to associative (AR, or interconceptual) ones. Using semantically unrelated and related word pairs comprised of CR and AR, our aim in this study was to verify the involvement of the RH in the processing of associative relationships. Strength-independent topographical analysis of ERP map series using temporal segmentation procedures showed the same sequence of eight stable map segments in CR and AR conditions. Statistical analysis revealed no difference between conditions either in terms of duration or in terms of time of occurrence of the segmentation maps. However, field strength comparisons between the two conditions using the global field power measure at each time point revealed higher field strength in CR than in AR condition between 300 and 330 ms. Distributed source localisation showed a similar pattern of activation during this time period, involving predominantly left frontal regions. Nevertheless, the strength of the source found in the left medial frontal gyrus differed between CR than AR conditions, thus explaining the differences observed in field strength. Our data suggest that the processing of CR and AR words depend on the same neural network in the LH.
PID Serval
serval:BIB_F1A5011FD22F
PMID
Date de création
2008-01-25T10:37:01.312Z
Date de création dans IRIS
2025-05-21T06:13:32Z