Behavioural Neurology
March 29, 2011
Fabrice Bartolomei, Lionel Naccache
The global workspace (GW) theory proposes that conscious processing results from coherent neuronal activity between widely distributed brain regions, with fronto-parietal associative cortices as key elements. In this model, transition between conscious and non conscious states are predicted to be caused by abrupt non-linear massive changes of the level of coherence within this distributed...
Brain
August 2009
Marie Arthuis, Luc Valton, Jean Régis et al.
Loss of consciousness (LOC) is a dramatic clinical manifestation of temporal lobe seizures. Its underlying mechanism could involve altered coordinated neuronal activity between the brain regions that support conscious information processing. The consciousness access hypothesis assumes the existence of a global workspace in which information becomes available via synchronized activity within...
PLoS Biology
March 1, 2009
Raphaël Gaillard, Stanislas Dehaene, Claude Adam et al.
We compared conscious and nonconscious processing of briefly flashed words using a visual masking procedure while recording intracranial electroencephalogram (iEEG) in ten patients. Nonconscious processing of masked words was observed in multiple cortical areas, mostly within an early time window (<300 ms), accompanied by induced gamma-band activity, but without coherent long-distance neural...
Proceedings of the National Academy of Sciences
February 3, 2009
Tristan A Bekinschtein, Stanislas Dehaene, Benjamin Rohaut et al.
Can conscious processing be inferred from neurophysiological measurements? Some models stipulate that the active maintenance of perceptual representations across time requires consciousness. Capitalizing on this assumption, we designed an auditory paradigm that evaluates cerebral responses to violations of temporal regularities that are either local in time or global across several seconds....
Behavioral and Brain Sciences
December 1, 2007
Lionel Naccache, Stanislas Dehaene
AbstractCan we ever experimentally disentangle phenomenal consciousness from the cognitive accessibility inherent to conscious reports? In this commentary, we suggest that (1) Block's notion of phenomenal consciousness remains intractably entangled with the need to obtain subjective reports about it; and (2) many experimental paradigms suggest that the intuitive notion of a rich but...
Progress in Brain Research
2005
Lionel Naccache
13 citations
The scientific study of the cerebral substrate of consciousness has been marked by significant recent achievements, resulting partially from an interaction between the exploration of cognition in both brain-damaged patients and healthy subjects. Several neuropsychological syndromes contain marked dissociations that permit the identification of principles related to the neurophysiology of...
Revue Neurologique
April 1, 2004
Lionel Naccache
Since the last thirty Years, scientific study of the cerebral substrate of consciousness has been marked by significant achievements, resulting in part from a rich interaction between the exploration of cognition in both brain-damaged patients and healthy subjects. Several neuropsychological syndromes contain spectacular dissociations which permit to identify principles related to the...
Başak Türker, Dragana Manasova, Benoît Béranger et al.
preprint
ABSTRACT One of the goals of the neuroscience of consciousness is to identify neural markers capable of distinguishing brain dynamics in awake, healthy individuals from unconscious conditions. This problem also has a clinical diagnostic interest in disorders of consciousness. Recent research has shown that brain connectivity patterns characterized by long-range interactions and anticorrelations...