Contextual prediction errors reorganize naturalistic episodic memories in time

Abstract 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 m...

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Autores principales:	Fahd Yazin, Moumita Das, Arpan Banerjee, Dipanjan Roy
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/52bb81b762c94a08adfa9538f7220064
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spelling	oai:doaj.org-article:52bb81b762c94a08adfa9538f72200642021-12-02T17:34:48ZContextual prediction errors reorganize naturalistic episodic memories in time10.1038/s41598-021-90990-12045-2322https://doaj.org/article/52bb81b762c94a08adfa9538f72200642021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90990-1https://doaj.org/toc/2045-2322Abstract 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.Fahd YazinMoumita DasArpan BanerjeeDipanjan RoyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Fahd Yazin Moumita Das Arpan Banerjee Dipanjan Roy Contextual prediction errors reorganize naturalistic episodic memories in time
description	Abstract 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	article
author	Fahd Yazin Moumita Das Arpan Banerjee Dipanjan Roy
author_facet	Fahd Yazin Moumita Das Arpan Banerjee Dipanjan Roy
author_sort	Fahd Yazin
title	Contextual prediction errors reorganize naturalistic episodic memories in time
title_short	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_sort	contextual prediction errors reorganize naturalistic episodic memories in time
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/52bb81b762c94a08adfa9538f7220064
work_keys_str_mv	AT fahdyazin contextualpredictionerrorsreorganizenaturalisticepisodicmemoriesintime AT moumitadas contextualpredictionerrorsreorganizenaturalisticepisodicmemoriesintime AT arpanbanerjee contextualpredictionerrorsreorganizenaturalisticepisodicmemoriesintime AT dipanjanroy contextualpredictionerrorsreorganizenaturalisticepisodicmemoriesintime
_version_	1718379938997862400

Contextual prediction errors reorganize naturalistic episodic memories in time

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