Waves of consciousness: ongoing cortical patterns during binocular rivalry.
Diego Cosmelli, Olivier David, Jean-Philippe Lachaux, Jacques Martinerie, Line Garnero, Bernard Renault, Francisco J. Varela
Neuroimage September 1, 2004 DOI: 10.1016/j.neuroimage.2004.05.008 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Observational study Peer reviewed |
|---|---|
| Population | Human participants |
| Key findings | A distributed cortical network involving occipital, parietal, temporal, and frontal regions, measured by phase synchrony, is dynamically modulated in concert with perceptual dominance during binocular rivalry. |
Abstract
We present here ongoing patterns of distributed brain synchronous activity that correlate with the spontaneous flow of perceptual dominance during binocular rivalry. Specific modulation of the magnetoencephalographic (MEG) response evoked during conscious perception of a frequency-tagged stimulus was evidenced throughout rivalry. Estimation of the underlying cortical sources revealed, in addition to strong bilateral striate and extrastriate visual cortex activation, parietal, temporal pole and frontal contributions. Cortical activity was significantly modulated concomitantly to perceptual alternations in visual cortex, medial parietal and left frontal regions. Upon dominance, coactivation of occipital and frontal regions, including anterior cingulate and medial frontal areas, was established. This distributed cortical network, as measured by phase synchrony in the frequency tag band, was dynamically modulated in concert with the perceptual dominance of the tagged stimulus. While the anteroposterior pattern was recurrent through subjects, individual variations in the extension of the network were apparent.