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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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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. |
format | Online Article Text |
id | pubmed-6172267 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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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