Human brain activity during spontaneously reversing perception of ambiguous figures.

Détails

ID Serval
serval:BIB_8419218BE0CD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Human brain activity during spontaneously reversing perception of ambiguous figures.
Périodique
Proceedings of the Royal Society of London B Biological Sciences
Auteur(s)
Kleinschmidt A., Büchel C., Zeki S., Frackowiak R.S.
ISSN
0962-8452 (Print)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
1998
Volume
265
Numéro
1413
Pages
2427-2433
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
Looking at ambiguous figures results in rivalry with spontaneous alternation between two percepts. Using event-related functional magnetic resonance imaging, we localized transient human brain activity changes during perceptual reversals. Activation occurred in ventral occipital and intraparietal higher-order visual areas, deactivation in primary visual cortex and the pulvinar. Thus, without any physical stimulus changes, salient perceptual flips briefly engage widely separated specialized cortical areas, but are also associated with intermittent activity breakdown in structures putatively maintaining perceptual stability. Together, the dynamics of integrative perceptual experience are reflected in rapid spatially differentiated activity modulation within a cooperative set of neural structures.
Mots-clé
Brain/physiology, Humans, Magnetic Resonance Imaging, Visual Perception/physiology
Pubmed
Web of science
Création de la notice
16/09/2011 17:19
Dernière modification de la notice
03/03/2018 18:54
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