Cargando…
Pupil-linked arousal signals track the temporal organization of events in memory
Everyday life unfolds continuously, yet we tend to remember past experiences as discrete event sequences or episodes. Although this phenomenon has been well documented, the neuromechanisms that support the transformation of continuous experience into distinct and memorable episodes remain unknown. H...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7421896/ https://www.ncbi.nlm.nih.gov/pubmed/32782282 http://dx.doi.org/10.1038/s41467-020-17851-9 |
_version_ | 1783569994200645632 |
---|---|
author | Clewett, David Gasser, Camille Davachi, Lila |
author_facet | Clewett, David Gasser, Camille Davachi, Lila |
author_sort | Clewett, David |
collection | PubMed |
description | Everyday life unfolds continuously, yet we tend to remember past experiences as discrete event sequences or episodes. Although this phenomenon has been well documented, the neuromechanisms that support the transformation of continuous experience into distinct and memorable episodes remain unknown. Here, we show that changes in context, or event boundaries, elicit a burst of autonomic arousal, as indexed by pupil dilation. Event boundaries also lead to the segmentation of adjacent episodes in later memory, evidenced by changes in memory for the temporal duration, order, and perceptual details of recent event sequences. These subjective and objective changes in temporal memory are also related to distinct temporal features of pupil dilations to boundaries as well as to the temporal stability of more prolonged pupil-linked arousal states. Collectively, our findings suggest that pupil measures reflect both stability and change in ongoing mental context representations, which in turn shape the temporal structure of memory. |
format | Online Article Text |
id | pubmed-7421896 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-74218962020-08-18 Pupil-linked arousal signals track the temporal organization of events in memory Clewett, David Gasser, Camille Davachi, Lila Nat Commun Article Everyday life unfolds continuously, yet we tend to remember past experiences as discrete event sequences or episodes. Although this phenomenon has been well documented, the neuromechanisms that support the transformation of continuous experience into distinct and memorable episodes remain unknown. Here, we show that changes in context, or event boundaries, elicit a burst of autonomic arousal, as indexed by pupil dilation. Event boundaries also lead to the segmentation of adjacent episodes in later memory, evidenced by changes in memory for the temporal duration, order, and perceptual details of recent event sequences. These subjective and objective changes in temporal memory are also related to distinct temporal features of pupil dilations to boundaries as well as to the temporal stability of more prolonged pupil-linked arousal states. Collectively, our findings suggest that pupil measures reflect both stability and change in ongoing mental context representations, which in turn shape the temporal structure of memory. Nature Publishing Group UK 2020-08-11 /pmc/articles/PMC7421896/ /pubmed/32782282 http://dx.doi.org/10.1038/s41467-020-17851-9 Text en © The Author(s) 2020 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 Clewett, David Gasser, Camille Davachi, Lila Pupil-linked arousal signals track the temporal organization of events in memory |
title | Pupil-linked arousal signals track the temporal organization of events in memory |
title_full | Pupil-linked arousal signals track the temporal organization of events in memory |
title_fullStr | Pupil-linked arousal signals track the temporal organization of events in memory |
title_full_unstemmed | Pupil-linked arousal signals track the temporal organization of events in memory |
title_short | Pupil-linked arousal signals track the temporal organization of events in memory |
title_sort | pupil-linked arousal signals track the temporal organization of events in memory |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7421896/ https://www.ncbi.nlm.nih.gov/pubmed/32782282 http://dx.doi.org/10.1038/s41467-020-17851-9 |
work_keys_str_mv | AT clewettdavid pupillinkedarousalsignalstrackthetemporalorganizationofeventsinmemory AT gassercamille pupillinkedarousalsignalstrackthetemporalorganizationofeventsinmemory AT davachilila pupillinkedarousalsignalstrackthetemporalorganizationofeventsinmemory |