Journal ArticleDOI
Timing of the brain events underlying access to consciousness during the attentional blink
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TLDR
It is suggested that the transition toward access to consciousness relates to the optional triggering of a late wave of activation that spreads through a distributed network of cortical association areas.Abstract:
In the phenomenon of attentional blink, identical visual stimuli are sometimes fully perceived and sometimes not detected at all. This phenomenon thus provides an optimal situation to study the fate of stimuli not consciously perceived and the differences between conscious and nonconscious processing. We correlated behavioral visibility ratings and recordings of event-related potentials to study the temporal dynamics of access to consciousness. Intact early potentials (P1 and N1) were evoked by unseen words, suggesting that these brain events are not the primary correlates of conscious perception. However, we observed a rapid divergence around 270 ms, after which several brain events were evoked solely by seen words. Thus, we suggest that the transition toward access to consciousness relates to the optional triggering of a late wave of activation that spreads through a distributed network of cortical association areas.read more
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Consciousness in humans and non-human animals: recent advances and future directions.
Mélanie Boly,Mélanie Boly,Anil K. Seth,Melanie Wilke,Paul Ingmundson,Bernard J. Baars,Steven Laureys,David B. Edelman,Naotsugu Tsuchiya +8 more
TL;DR: Recent advances in the understanding of subjectivity in humans and other animals, including empirical, applied, technical, and conceptual insights are summarized, including the evidence for the importance of fronto-parietal connectivity and of top-down processes.
Journal ArticleDOI
Event-related delta and theta synchronization during explicit and implicit emotion processing.
TL;DR: It is shown that in both experiments theta and delta synchronization is stronger upon presentation of "emotional" than "neutral" stimuli, and in subjects who are more sensitive, or experience higher emotional involvement than in less sensitive or detached subjects.
Journal ArticleDOI
Robust EEG-based cross-site and cross-protocol classification of states of consciousness.
Denis A. Engemann,Denis A. Engemann,Denis A. Engemann,Federico Raimondo,Jean-Rémi King,Jean-Rémi King,Jean-Rémi King,Benjamin Rohaut,Benjamin Rohaut,Gilles Louppe,Frédéric Faugeras,Jitka Annen,Helena Cassol,Olivia Gosseries,Diego Fernández-Slezak,Steven Laureys,Lionel Naccache,Lionel Naccache,Stanislas Dehaene,Stanislas Dehaene,Jacobo D. Sitt,Jacobo D. Sitt +21 more
TL;DR: The findings demonstrate that EEG markers of consciousness can be reliably, economically and automatically identified with machine learning in various clinical and acquisition contexts and shows that the generalization performance from Paris to Liège remains stable even if up to 20% of the diagnostic labels are randomly flipped.
Journal ArticleDOI
Gamma band activity and the P3 reflect post-perceptual processes, not visual awareness
TL;DR: This pattern of results challenges a number of previous proposals linking gamma band activity in the EEG and the P3 to conscious perception, indicating that each reflects distinct post-perceptual processes necessary for carrying-out the task but not for consciously perceiving the stimuli.
Journal ArticleDOI
The impact of hunger on food cue processing: an event-related brain potential study.
TL;DR: Evidence is provided that hunger may induce a heightened state of attention for food stimuli in a processing stage related to stimulus recognition and focused attention and that deprivation enhanced visual attention to food cues in later processing stages.
References
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Book
A cognitive theory of consciousness
TL;DR: In this article, the basic model of conscious representations are internally consistent and globally distributed, and the neural basis of conscious experience is explained, including the fundamental role of context, goal contexts, spontaneous problem solving and the stream of consciousness.
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Temporary suppression of visual processing in an RSVP task: an attentional blink? .
TL;DR: The authors found that the presentation of stimuli after the target but before target-identification processes are complete produces interference at a letter recognition stage, which may cause the temporary suppression of visual attention mechanisms observed in the present study.
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Electromagnetic brain mapping
TL;DR: The underlying models currently used in MEG/EEG source estimation are described and the various signal processing steps required to compute these sources are described.
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Reference-free identification of components of checkerboard-evoked multichannel potential fields
TL;DR: A method is proposed to determine components of evoked scalp potentials, in terms of times of occurrence (latency) and location on the scalp (topography), suggesting a stable localization of the generating process in depth.
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A two-stage model for multiple target detection in rapid serial visual presentation.
Marvin M. Chun,Mary C. Potter +1 more
TL;DR: Results of Experiments 3-5 confirmed that AB is triggered by local interference from immediate posttarget stimulation and showed thatAB is modulated by the discriminability between the 1st target and the immediately following distractor.