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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...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
eLife Sciences Publications, Ltd
2020
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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. |
format | Online Article Text |
id | pubmed-7676863 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | eLife Sciences Publications, Ltd |
record_format | MEDLINE/PubMed |
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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