A1 Refereed original research article in a scientific journal
Tracking the processes behind conscious perception: A review of event-related potential correlates of visual consciousness
Authors: Railo H, Koivisto M, Revonsuo A
Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE
Publication year: 2011
Journal: Consciousness and Cognition
Journal name in source: CONSCIOUSNESS AND COGNITION
Journal acronym: CONSCIOUS COGN
Number in series: 3
Volume: 20
Issue: 3
First page : 972
Last page: 983
Number of pages: 12
ISSN: 1053-8100
DOI: https://doi.org/10.1016/j.concog.2011.03.019
Abstract
Event-related potential (ERP) studies have attempted to discover the processes that underlie conscious visual perception by contrasting ERPs produced by stimuli that are consciously perceived with those that are not. Variability of the proposed ERP correlates of consciousness is considerable: the earliest proposed ERP correlate of consciousness (P1) coincides with sensory processes and the last one (P3) marks postperceptual processes. A negative difference wave called visual awareness negativity (VAN), typically observed around 200 ms after stimulus onset in occipitotemporal sites, gains strong support for reflecting the processes that correlate with, and possibly enable, aware visual perception. Research suggests that the early parts of conscious processing can proceed independently of top-down attention, although top-down attention may modulate visual processing even before consciousness. Evidence implies that the contents of consciousness are provided by interactions in the ventral stream, but indispensable contributions from dorsal regions influence already low-level visual responses. (C) 2011 Elsevier Inc. All rights reserved.
Event-related potential (ERP) studies have attempted to discover the processes that underlie conscious visual perception by contrasting ERPs produced by stimuli that are consciously perceived with those that are not. Variability of the proposed ERP correlates of consciousness is considerable: the earliest proposed ERP correlate of consciousness (P1) coincides with sensory processes and the last one (P3) marks postperceptual processes. A negative difference wave called visual awareness negativity (VAN), typically observed around 200 ms after stimulus onset in occipitotemporal sites, gains strong support for reflecting the processes that correlate with, and possibly enable, aware visual perception. Research suggests that the early parts of conscious processing can proceed independently of top-down attention, although top-down attention may modulate visual processing even before consciousness. Evidence implies that the contents of consciousness are provided by interactions in the ventral stream, but indispensable contributions from dorsal regions influence already low-level visual responses. (C) 2011 Elsevier Inc. All rights reserved.
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