A neuronal network model linking subjective reports and objective physiological data during conscious perception
Reads0
Chats0
TLDR
A neuronal network model is described that proposes that the step of conscious perception is related to the entry of processed visual stimuli into a global brain state that links distant areas including the prefrontal cortex through reciprocal connections, and thus makes perceptual information reportable by multiple means.Abstract:
The subjective experience of perceiving visual stimuli is accompanied by objective neuronal activity patterns such as sustained activity in primary visual area (V1), amplification of perceptual processing, correlation across distant regions, joint parietal, frontal, and cingulate activation, γ-band oscillations, and P300 waveform. We describe a neuronal network model that aims at explaining how those physiological parameters may cohere with conscious reports. The model proposes that the step of conscious perception, referred to as access awareness, is related to the entry of processed visual stimuli into a global brain state that links distant areas including the prefrontal cortex through reciprocal connections, and thus makes perceptual information reportable by multiple means. We use the model to simulate a classical psychological paradigm: the attentional blink. In addition to reproducing the main objective and subjective features of this paradigm, the model predicts an unique property of nonlinear transition from nonconscious processing to subjective perception. This all-or-none dynamics of conscious perception was verified behaviorally in human subjects.read more
Citations
More filters
Journal ArticleDOI
Experimental and Theoretical Approaches to Conscious Processing
TL;DR: Converging neuroimaging and neurophysiological data point to objective neural measures of conscious access: late amplification of relevant sensory activity, long-distance cortico-cortical synchronization at beta and gamma frequencies, and "ignition" of a large-scale prefronto-parietal network.
Journal ArticleDOI
Conscious, preconscious, and subliminal processing: a testable taxonomy.
Stanislas Dehaene,Jean-Pierre Changeux,Jean-Pierre Changeux,Lionel Naccache,Jérôme Sackur,Claire Sergent +5 more
TL;DR: A taxonomy is proposed that distinguishes between vigilance and access to conscious report, as well as between subliminal, preconscious and conscious processing, and that conscious perception is systematically associated with surges of parieto-frontal activity causing top-down amplification.
Journal ArticleDOI
Emotion processing and the amygdala: from a 'low road' to 'many roads' of evaluating biological significance
Luiz Pessoa,Ralph Adolphs +1 more
TL;DR: It is proposed that the primary role of the amygdala in visual processing, like that of the pulvinar, is to coordinate the function of cortical networks during evaluation of the biological significance of affective visual stimuli.
Journal ArticleDOI
An information integration theory of consciousness
TL;DR: The information integration theory accounts, in a principled manner, for several neurobiological observations concerning consciousness, including the association of consciousness with certain neural systems rather than with others; the fact that neural processes underlying consciousness can influence or be influenced by neural processes that remain unconscious; the reduction of consciousness during dreamless sleep and generalized seizures.
Journal ArticleDOI
Consciousness and Anesthesia
TL;DR: Anesthesia undoubtedly induces unresponsiveness and amnesia, but the extent to which it causes unconsciousness is harder to establish.
References
More filters
Journal ArticleDOI
Distributed Hierarchical Processing in the Primate Cerebral Cortex
TL;DR: A summary of the layout of cortical areas associated with vision and with other modalities, a computerized database for storing and representing large amounts of information on connectivity patterns, and the application of these data to the analysis of hierarchical organization of the cerebral cortex are reported on.
Book
Theoretical Neuroscience: Computational and Mathematical Modeling of Neural Systems
Peter Dayan,L. F. Abbott +1 more
TL;DR: This text introduces the basic mathematical and computational methods of theoretical neuroscience and presents applications in a variety of areas including vision, sensory-motor integration, development, learning, and memory.
Journal ArticleDOI
Thalamocortical oscillations in the sleeping and aroused brain
TL;DR: Analysis of cortical and thalamic networks at many levels, from molecules to single neurons to large neuronal assemblies, with a variety of techniques, is beginning to yield insights into the mechanisms of the generation, modulation, and function of brain oscillations.
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.