Journal ArticleDOI
Timing of the brain events underlying access to consciousness during the attentional blink
Reads0
Chats0
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
Citations
More filters
Journal ArticleDOI
Explicit attention interferes with selective emotion processing in human extrastriate cortex.
Harald T. Schupp,Jessica Stockburger,Florian Bublatzky,Markus Junghöfer,Almut I. Weike,Alfons O. Hamm +5 more
TL;DR: It is demonstrated that taxing processing resources by a competing primary visual attention task markedly attenuated the early discrimination of emotional from neutral picture contents, providing further empirical support for an interference account of the emotion-attention interaction under conditions of competition.
Journal ArticleDOI
Purging of Memories from Conscious Awareness Tracked in the Human Brain
TL;DR: The correlates of consciousness in humans are tracked using functional magnetic resonance imaging and the involvement of a downregulation mechanism that purges contents from conscious awareness is demonstrated, tying the voluntary control of phenomenal awareness to observable changes in neural activity linked to awareness.
Journal ArticleDOI
On the Neural Mechanisms Subserving Consciousness and Attention
TL;DR: It appears that consciousness and attention rely on distinct neural properties, although they can interact at the behavioral level, and it is proposed that a “cumulative influence model,” in which attention and consciousness correspond to distinct neural mechanisms feeding a single decisional process leading to behavior, fits best with available neural and behavioral data.
Journal ArticleDOI
Distinct cortical codes and temporal dynamics for conscious and unconscious percepts
TL;DR: In this paper, a line was briefly presented in one of eight different possible locations on a screen and participants had to report the location of the line and then say whether they had seen it or had merely guessed its location.
Journal ArticleDOI
Three stages of emotional word processing: an ERP study with rapid serial visual presentation
TL;DR: It is believed that the nature of emotion can be analyzed by the brain independent of stimulus type, and that the three-stage scheme may be a common model for emotional information processing in the context of limited attentional resources.
References
More filters
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.