Electrical neuroimaging reveals early generator modulation to emotional words

Détails

ID Serval
serval:BIB_19BCECCE1F23
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Electrical neuroimaging reveals early generator modulation to emotional words
Périodique
Neuroimage
Auteur(s)
Ortigue  S., Michel  C. M., Murray  M. M., Mohr  C., Carbonnel  S., Landis  T.
ISSN
1053-8119
Statut éditorial
Publié
Date de publication
04/2004
Peer-reviewed
Oui
Volume
21
Numéro
4
Pages
1242-51
Notes
Journal Article Research Support, Non-U.S. Gov't --- Old month value: Apr
Résumé
Functional electrical neuroimaging investigated incidental emotional word processing. Previous research suggests that the brain may differentially respond to the emotional content of linguistic stimuli pre-lexically (i.e., before distinguishing that these stimuli are words). We investigated the spatiotemporal brain mechanisms of this apparent paradox and in particular whether the initial differentiation of emotional stimuli is marked by different brain generator configurations using high-density, event-related potentials. Such would support the existence of specific cerebral resources dedicated to emotional word processing. A related issue concerns the possibility of right-hemispheric specialization in the processing of emotional stimuli. Thirteen healthy men performed a go/no-go lexical decision task with bilateral word/non-word or non-word/non-word stimulus pairs. Words included equal numbers of neutral and emotional stimuli, but subjects made no explicit discrimination along this dimension. Emotional words appearing in the right visual field (ERVF) yielded the best overall performance, although the difference between emotional and neutral words was larger for left than for right visual field presentations. Electrophysiologically, ERVF presentations were distinguished from all other conditions over the 100-140 ms period by a distinct scalp topography, indicative of different intracranial generator configurations. A distributed linear source estimation (LAURA) of this distinct scalp potential field revealed bilateral lateral-occipital sources with a right hemisphere current density maximum. These data support the existence of a specialized brain network triggered by the emotional connotation of words at a very early processing stage.
Mots-clé
Adult Arousal/physiology *Brain Mapping Cerebral Cortex/*physiology Decision Making/*physiology Discrimination Learning/physiology Dominance, Cerebral/*physiology *Electroencephalography Emotions/*physiology Evoked Potentials/physiology Humans *Image Processing, Computer-Assisted *Imaging, Three-Dimensional Magnetoencephalography Male Paired-Associate Learning/physiology Psychomotor Performance/*physiology Reaction Time/physiology *Reading Regression Analysis *Semantics Signal Processing, Computer-Assisted Visual Fields/physiology
Pubmed
Web of science
Création de la notice
21/01/2008 11:23
Dernière modification de la notice
20/08/2019 13:50
Données d'usage