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- W1972724226 abstract "Neuronal theories of conscious access tentatively relate conscious perception to the integration and global broadcasting of information across distant cortical and thalamic areas [1Tononi G. Edelman G.M. Consciousness and complexity.Science. 1998; 282: 1846-1851Crossref PubMed Scopus (1065) Google Scholar, 2Tononi G. Koch C. The neural correlates of consciousness: an update.Ann. N Y Acad. Sci. 2008; 1124: 239-261Crossref PubMed Scopus (389) Google Scholar, 3Dehaene S. Changeux J.-P. Experimental and theoretical approaches to conscious processing.Neuron. 2011; 70: 200-227Abstract Full Text Full Text PDF PubMed Scopus (1353) Google Scholar, 4Lamme V.F. How neuroscience will change our view on consciousness.Cogn. Neurosci. 2010; 1: 204-220Crossref PubMed Scopus (254) Google Scholar, 5Rees G. Kreiman G. Koch C. Neural correlates of consciousness in humans.Nat. Rev. Neurosci. 2002; 3: 261-270Crossref PubMed Scopus (549) Google Scholar, 6Dehaene S. Changeux J.P. Naccache L. Sackur J. Sergent C. Conscious, preconscious, and subliminal processing: a testable taxonomy.Trends Cogn. Sci. 2006; 10: 204-211Abstract Full Text Full Text PDF PubMed Scopus (1340) Google Scholar]. Experiments contrasting visible and invisible stimuli support this view and suggest that global neuronal communication may be detectable using scalp electroencephalography (EEG) [3Dehaene S. Changeux J.-P. Experimental and theoretical approaches to conscious processing.Neuron. 2011; 70: 200-227Abstract Full Text Full Text PDF PubMed Scopus (1353) Google Scholar, 5Rees G. Kreiman G. Koch C. Neural correlates of consciousness in humans.Nat. Rev. Neurosci. 2002; 3: 261-270Crossref PubMed Scopus (549) Google Scholar, 6Dehaene S. Changeux J.P. Naccache L. Sackur J. Sergent C. Conscious, preconscious, and subliminal processing: a testable taxonomy.Trends Cogn. Sci. 2006; 10: 204-211Abstract Full Text Full Text PDF PubMed Scopus (1340) Google Scholar, 7Gaillard R. Dehaene S. Adam C. Clémenceau S. Hasboun D. Baulac M. Cohen L. Naccache L. Converging intracranial markers of conscious access.PLoS Biol. 2009; 7: e61Crossref PubMed Scopus (323) Google Scholar, 8Sergent C. Baillet S. Dehaene S. Timing of the brain events underlying access to consciousness during the attentional blink.Nat. Neurosci. 2005; 8: 1391-1400Crossref PubMed Scopus (627) Google Scholar, 9Melloni L. Schwiedrzik C.M. Müller N. Rodriguez E. Singer W. Expectations change the signatures and timing of electrophysiological correlates of perceptual awareness.J. Neurosci. 2011; 31: 1386-1396Crossref PubMed Scopus (159) Google Scholar, 10Del Cul A. Baillet S. Dehaene S. Brain dynamics underlying the nonlinear threshold for access to consciousness.PLoS Biol. 2007; 5: e260Crossref PubMed Scopus (513) Google Scholar, 11Fisch L. Privman E. Ramot M. Harel M. Nir Y. Kipervasser S. Andelman F. Neufeld M.Y. Kramer U. Fried I. Malach R. Neural “ignition”: enhanced activation linked to perceptual awareness in human ventral stream visual cortex.Neuron. 2009; 64: 562-574Abstract Full Text Full Text PDF PubMed Scopus (179) Google Scholar]. However, whether global information sharing across brain areas also provides a specific signature of conscious state in awake but noncommunicating patients remains an active topic of research [12Faugeras F. Rohaut B. Weiss N. Bekinschtein T. Galanaud D. Puybasset L. Bolgert F. Sergent C. Cohen L. Dehaene S. Naccache L. Event related potentials elicited by violations of auditory regularities in patients with impaired consciousness.Neuropsychologia. 2012; 50: 403-418Crossref PubMed Scopus (116) Google Scholar, 13Lehembre R. Marie-Aurélie B. Vanhaudenhuyse A. Chatelle C. Cologan V. Leclercq Y. Soddu A. Macq B. Laureys S. Noirhomme Q. Resting-state EEG study of comatose patients: a connectivity and frequency analysis to find differences between vegetative and minimally conscious states.Funct. Neurol. 2012; 27: 41-47PubMed Google Scholar, 14Fingelkurts A.A. Fingelkurts A.A. Bagnato S. Boccagni C. Galardi G. EEG oscillatory states as neuro-phenomenology of consciousness as revealed from patients in vegetative and minimally conscious states.Conscious. Cogn. 2012; 21: 149-169Crossref PubMed Scopus (63) Google Scholar, 15Rosanova M. Gosseries O. Casarotto S. Boly M. Casali A.G. Bruno M.-A. Mariotti M. Boveroux P. Tononi G. Laureys S. Massimini M. Recovery of cortical effective connectivity and recovery of consciousness in vegetative patients.Brain. 2012; 135: 1308-1320Crossref PubMed Scopus (299) Google Scholar]. We designed a novel measure termed “weighted symbolic mutual information” (wSMI) and applied it to 181 high-density EEG recordings of awake patients recovering from coma and diagnosed in various states of consciousness. The results demonstrate that this measure of information sharing systematically increases with consciousness state, particularly across distant sites. This effect sharply distinguishes patients in vegetative state (VS), minimally conscious state (MCS), and conscious state (CS) and is observed regardless of etiology and delay since insult. The present findings support distributed theories of conscious processing and open up the possibility of an automatic detection of conscious states, which may be particularly important for the diagnosis of awake but noncommunicating patients." @default.
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- W1972724226 date "2013-10-01" @default.
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- W1972724226 title "Information Sharing in the Brain Indexes Consciousness in Noncommunicative Patients" @default.
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