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A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli

A powerful paradigm to identify neural correlates of consciousness is binocular rivalry, wherein a constant visual stimulus evokes a varying conscious percept. It has recently been suggested that activity modulations observed during rivalry may represent the act of report rather than the conscious p...

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Detalles Bibliográficos
Autores principales: Hesse, Janis Karan, Tsao, Doris Y
Formato: Online Artículo Texto
Lenguaje:English
Publicado: eLife Sciences Publications, Ltd 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7676863/
https://www.ncbi.nlm.nih.gov/pubmed/33174836
http://dx.doi.org/10.7554/eLife.58360
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author Hesse, Janis Karan
Tsao, Doris Y
author_facet Hesse, Janis Karan
Tsao, Doris Y
author_sort Hesse, Janis Karan
collection PubMed
description A powerful paradigm to identify neural correlates of consciousness is binocular rivalry, wherein a constant visual stimulus evokes a varying conscious percept. It has recently been suggested that activity modulations observed during rivalry may represent the act of report rather than the conscious percept itself. Here, we performed single-unit recordings from face patches in macaque inferotemporal (IT) cortex using a no-report paradigm in which the animal’s conscious percept was inferred from eye movements. We found that large proportions of IT neurons represented the conscious percept even without active report. Furthermore, on single trials we could decode both the conscious percept and the suppressed stimulus. Together, these findings indicate that (1) IT cortex possesses a true neural correlate of consciousness and (2) this correlate consists of a population code wherein single cells multiplex representation of the conscious percept and veridical physical stimulus, rather than a subset of cells perfectly reflecting consciousness.
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spelling pubmed-76768632020-11-23 A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli Hesse, Janis Karan Tsao, Doris Y eLife Neuroscience A powerful paradigm to identify neural correlates of consciousness is binocular rivalry, wherein a constant visual stimulus evokes a varying conscious percept. It has recently been suggested that activity modulations observed during rivalry may represent the act of report rather than the conscious percept itself. Here, we performed single-unit recordings from face patches in macaque inferotemporal (IT) cortex using a no-report paradigm in which the animal’s conscious percept was inferred from eye movements. We found that large proportions of IT neurons represented the conscious percept even without active report. Furthermore, on single trials we could decode both the conscious percept and the suppressed stimulus. Together, these findings indicate that (1) IT cortex possesses a true neural correlate of consciousness and (2) this correlate consists of a population code wherein single cells multiplex representation of the conscious percept and veridical physical stimulus, rather than a subset of cells perfectly reflecting consciousness. eLife Sciences Publications, Ltd 2020-11-11 /pmc/articles/PMC7676863/ /pubmed/33174836 http://dx.doi.org/10.7554/eLife.58360 Text en © 2020, Hesse and Tsao http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited.
spellingShingle Neuroscience
Hesse, Janis Karan
Tsao, Doris Y
A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli
title A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli
title_full A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli
title_fullStr A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli
title_full_unstemmed A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli
title_short A new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli
title_sort new no-report paradigm reveals that face cells encode both consciously perceived and suppressed stimuli
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7676863/
https://www.ncbi.nlm.nih.gov/pubmed/33174836
http://dx.doi.org/10.7554/eLife.58360
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