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Contextual prediction errors reorganize naturalistic episodic memories in time
Episodic memories are contextual experiences ordered in time. This is underpinned by associative binding between events within the same contexts. The role of prediction errors in declarative memory is well established but has not been investigated in the time dimension of complex episodic memories....
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8196002/ https://www.ncbi.nlm.nih.gov/pubmed/34117294 http://dx.doi.org/10.1038/s41598-021-90990-1 |
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author | Yazin, Fahd Das, Moumita Banerjee, Arpan Roy, Dipanjan |
author_facet | Yazin, Fahd Das, Moumita Banerjee, Arpan Roy, Dipanjan |
author_sort | Yazin, Fahd |
collection | PubMed |
description | Episodic memories are contextual experiences ordered in time. This is underpinned by associative binding between events within the same contexts. The role of prediction errors in declarative memory is well established but has not been investigated in the time dimension of complex episodic memories. Here we combine these two properties of episodic memory, extend them into the temporal domain and demonstrate that prediction errors in different naturalistic contexts lead to changes in the temporal ordering of event structures in them. The wrongly predicted older sequences were weakened despite their reactivation. Interestingly the newly encoded sequences with prediction errors, seen once, showed accuracy as high as control sequences which were viewed repeatedly without change. Drift–diffusion modelling revealed a lower decision threshold for the newer sequences than older sequences, reflected by their faster recall. Moreover, participants’ adjustments to their decision threshold significantly correlated with their relative speed of sequence memory recall. These results suggest a temporally distinct and adaptive role for prediction errors in learning and reorganizing episodic temporal sequences. |
format | Online Article Text |
id | pubmed-8196002 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-81960022021-06-14 Contextual prediction errors reorganize naturalistic episodic memories in time Yazin, Fahd Das, Moumita Banerjee, Arpan Roy, Dipanjan Sci Rep Article Episodic memories are contextual experiences ordered in time. This is underpinned by associative binding between events within the same contexts. The role of prediction errors in declarative memory is well established but has not been investigated in the time dimension of complex episodic memories. Here we combine these two properties of episodic memory, extend them into the temporal domain and demonstrate that prediction errors in different naturalistic contexts lead to changes in the temporal ordering of event structures in them. The wrongly predicted older sequences were weakened despite their reactivation. Interestingly the newly encoded sequences with prediction errors, seen once, showed accuracy as high as control sequences which were viewed repeatedly without change. Drift–diffusion modelling revealed a lower decision threshold for the newer sequences than older sequences, reflected by their faster recall. Moreover, participants’ adjustments to their decision threshold significantly correlated with their relative speed of sequence memory recall. These results suggest a temporally distinct and adaptive role for prediction errors in learning and reorganizing episodic temporal sequences. Nature Publishing Group UK 2021-06-11 /pmc/articles/PMC8196002/ /pubmed/34117294 http://dx.doi.org/10.1038/s41598-021-90990-1 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Yazin, Fahd Das, Moumita Banerjee, Arpan Roy, Dipanjan Contextual prediction errors reorganize naturalistic episodic memories in time |
title | Contextual prediction errors reorganize naturalistic episodic memories in time |
title_full | Contextual prediction errors reorganize naturalistic episodic memories in time |
title_fullStr | Contextual prediction errors reorganize naturalistic episodic memories in time |
title_full_unstemmed | Contextual prediction errors reorganize naturalistic episodic memories in time |
title_short | Contextual prediction errors reorganize naturalistic episodic memories in time |
title_sort | contextual prediction errors reorganize naturalistic episodic memories in time |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8196002/ https://www.ncbi.nlm.nih.gov/pubmed/34117294 http://dx.doi.org/10.1038/s41598-021-90990-1 |
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