The many faces of the gamma band response to complex visual stimuli

Jean-Philippe Lachaux, Nathalie George, Catherine Tallon-Baudry, Jacques Martinerie, Laurent Hugueville, Lorella Minotti, Philippe Kahane, Bernard Renault
2005 NeuroImage  
While much is known about the functional architecture of the visual system, little is known about its large-scale dynamics during perception. This study describes this dynamics with a high spatial, temporal and spectral resolution. We recorded depth EEG of epileptic patients performing a face detection task and found that the stimuli induced strong modulations in the gamma band (40 Hz to 200 Hz) in selective occipital, parietal and temporal sites, in particular the fusiform gyrus, the lateral
more » ... yrus, the lateral occipital gyrus and the intra-parietal sulcus. Occipitotemporal sites were the first to be activated, closely followed by the parietal sites, while portions of the primary visual cortex seemed to deactivate temporarily. Some of those effects were found to be correlated across distant sites, suggesting that a coordinated balance between regional gamma activations and deactivations could be involved during visual perception. D 2004 Elsevier Inc. All rights reserved.
doi:10.1016/j.neuroimage.2004.11.052 pmid:15784428 fatcat:sus25tru7rezhmrzezn45vk2ym