Synchronization of neural activity across cortical areas correlates with conscious perception

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dc.contributor.authorMelloni, Lucia
dc.contributor.authorMolina, Carlos
dc.contributor.authorPena, Marcela
dc.contributor.authorTorres, David
dc.contributor.authorSinger, Wolf
dc.contributor.authorRodriguez, Eugenio
dc.date.accessioned2024-01-10T14:21:48Z
dc.date.available2024-01-10T14:21:48Z
dc.date.issued2007
dc.description.abstractSubliminal stimuli can be deeply processed and activate similar brain areas as consciously perceived stimuli. This raises the question which signatures of neural activity critically differentiate conscious from unconscious processing. Transient synchronization of neural activity has been proposed as a neural correlate of conscious perception. Here we test this proposal by comparing the electrophysiological responses related to the processing of visible and invisible words in a delayed matching to sample task. Both perceived and nonperceived words caused a similar increase of local (gamma) oscillations in the EEG, but only perceived words induced a transient long-distance synchronization of gamma oscillations across widely separated regions of the brain. After this transient period of temporal coordination, the electrographic signatures of conscious and unconscious processes continue to diverge. Only words reported as perceived induced (1) enhanced theta oscillations over frontal regions during the maintenance interval, (2) an increase of the P300 component of the event-related potential, and (3) an increase in power and phase synchrony of gamma oscillations before the anticipated presentation of the test word. We propose that the critical process mediating the access to conscious perception is the early transient global increase of phase synchrony of oscillatory activity in the gamma frequency range.
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1523/JNEUROSCI.4623-06.2007
dc.identifier.eissn1529-2401
dc.identifier.issn0270-6474
dc.identifier.pubmedidMEDLINE:17360907
dc.identifier.urihttps://doi.org/10.1523/JNEUROSCI.4623-06.2007
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79785
dc.identifier.wosidWOS:000245103600014
dc.information.autorucPsicología;Pena M;S/I;1002571
dc.issue.numero11
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final2865
dc.pagina.inicio2858
dc.publisherSOC NEUROSCIENCE
dc.revistaJOURNAL OF NEUROSCIENCE
dc.rightsregistro bibliográfico
dc.subjectvisual awareness
dc.subjectelectroencephalography
dc.subjectevent-related potentials
dc.subjectgamma-band oscillations
dc.subjectlong-range coordination
dc.subjectoscillatory neural synchrony
dc.subjectPHASE SYNCHRONIZATION
dc.subjectTEMPORAL BINDING
dc.subjectOSCILLATIONS
dc.subjectRECOGNITION
dc.subjectMODULATION
dc.subjectACTIVATION
dc.subjectMECHANISMS
dc.subjectAWARENESS
dc.subjectRESPONSES
dc.subjectMASKING
dc.titleSynchronization of neural activity across cortical areas correlates with conscious perception
dc.typeartículo
dc.volumen27
sipa.codpersvinculados1002571
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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