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Conscious processing of auditory regularities induces a pupil dilation

Pupil dilation has been reliably identified as a physiological marker of consciously reportable mental effort. This classical finding raises the question of whether or not pupil dilation could be a specific somatic signature of conscious processing. In order to explore this possibility, we engaged h...

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Autores principales: Quirins, Marion, Marois, Clémence, Valente, Mélanie, Seassau, Magali, Weiss, Nicolas, El Karoui, Imen, Hochmann, Jean-Rémy, Naccache, Lionel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6172267/
https://www.ncbi.nlm.nih.gov/pubmed/30287943
http://dx.doi.org/10.1038/s41598-018-33202-7
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author Quirins, Marion
Marois, Clémence
Valente, Mélanie
Seassau, Magali
Weiss, Nicolas
El Karoui, Imen
Hochmann, Jean-Rémy
Naccache, Lionel
author_facet Quirins, Marion
Marois, Clémence
Valente, Mélanie
Seassau, Magali
Weiss, Nicolas
El Karoui, Imen
Hochmann, Jean-Rémy
Naccache, Lionel
author_sort Quirins, Marion
collection PubMed
description Pupil dilation has been reliably identified as a physiological marker of consciously reportable mental effort. This classical finding raises the question of whether or not pupil dilation could be a specific somatic signature of conscious processing. In order to explore this possibility, we engaged healthy volunteers in the ‘local global’ auditory paradigm we previously designed to disentangle conscious from non-conscious processing of novelty. We discovered that consciously reported violations of global (inter-trials) regularity were associated with a pupil dilation effect both in an active counting task and in a passive attentive task. This pupil dilation effect was detectable both at the group-level and at the individual level. In contrast, unreported violations of this global regularity, as well as unreported violations of local (intra-trial) regularity that do not require conscious access, were not associated with a pupil dilation effect. We replicated these findings in a phonemic version of the ‘local global’. Taken together these results strongly suggest that pupil dilation is a somatic marker of conscious access in the auditory modality, and that it could therefore be used to easily probe conscious processing at the individual level without interfering with participant’s stream of consciousness by questioning him/her.
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spelling pubmed-61722672018-10-09 Conscious processing of auditory regularities induces a pupil dilation Quirins, Marion Marois, Clémence Valente, Mélanie Seassau, Magali Weiss, Nicolas El Karoui, Imen Hochmann, Jean-Rémy Naccache, Lionel Sci Rep Article Pupil dilation has been reliably identified as a physiological marker of consciously reportable mental effort. This classical finding raises the question of whether or not pupil dilation could be a specific somatic signature of conscious processing. In order to explore this possibility, we engaged healthy volunteers in the ‘local global’ auditory paradigm we previously designed to disentangle conscious from non-conscious processing of novelty. We discovered that consciously reported violations of global (inter-trials) regularity were associated with a pupil dilation effect both in an active counting task and in a passive attentive task. This pupil dilation effect was detectable both at the group-level and at the individual level. In contrast, unreported violations of this global regularity, as well as unreported violations of local (intra-trial) regularity that do not require conscious access, were not associated with a pupil dilation effect. We replicated these findings in a phonemic version of the ‘local global’. Taken together these results strongly suggest that pupil dilation is a somatic marker of conscious access in the auditory modality, and that it could therefore be used to easily probe conscious processing at the individual level without interfering with participant’s stream of consciousness by questioning him/her. Nature Publishing Group UK 2018-10-04 /pmc/articles/PMC6172267/ /pubmed/30287943 http://dx.doi.org/10.1038/s41598-018-33202-7 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Quirins, Marion
Marois, Clémence
Valente, Mélanie
Seassau, Magali
Weiss, Nicolas
El Karoui, Imen
Hochmann, Jean-Rémy
Naccache, Lionel
Conscious processing of auditory regularities induces a pupil dilation
title Conscious processing of auditory regularities induces a pupil dilation
title_full Conscious processing of auditory regularities induces a pupil dilation
title_fullStr Conscious processing of auditory regularities induces a pupil dilation
title_full_unstemmed Conscious processing of auditory regularities induces a pupil dilation
title_short Conscious processing of auditory regularities induces a pupil dilation
title_sort conscious processing of auditory regularities induces a pupil dilation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6172267/
https://www.ncbi.nlm.nih.gov/pubmed/30287943
http://dx.doi.org/10.1038/s41598-018-33202-7
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