Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan

Episodic memories are multidimensional, including simple and complex features. How we successful encode and recover these features in time, whether these temporal dynamics are preserved across age, even under conditions of reduced memory performance, and the role of attention on these temporal dynam...

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Autores principales: Mirjalili, Soroush, Powell, Patrick, Strunk, Jonathan, James, Taylor, Duarte, Audrey
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Society for Neuroscience 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7877465/
https://www.ncbi.nlm.nih.gov/pubmed/33436445
http://dx.doi.org/10.1523/ENEURO.0387-20.2020
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author Mirjalili, Soroush
Powell, Patrick
Strunk, Jonathan
James, Taylor
Duarte, Audrey
author_facet Mirjalili, Soroush
Powell, Patrick
Strunk, Jonathan
James, Taylor
Duarte, Audrey
author_sort Mirjalili, Soroush
collection PubMed
description Episodic memories are multidimensional, including simple and complex features. How we successful encode and recover these features in time, whether these temporal dynamics are preserved across age, even under conditions of reduced memory performance, and the role of attention on these temporal dynamics is unknown. In the current study, we applied time-resolved multivariate decoding to oscillatory electroencephalography (EEG) in an adult lifespan sample to investigate the temporal order of successful encoding and recognition of simple and complex perceptual context features. At encoding, participants studied pictures of black and white objects presented with both color (low-level/simple) and scene (high-level/complex) context features and subsequently made context memory decisions for both features. Attentional demands were manipulated by having participants attend to the relationship between the object and either the color or scene while ignoring the other context feature. Consistent with hierarchical visual perception models, simple visual features (color) were successfully encoded earlier than were complex features (scenes). These features were successfully recognized in the reverse temporal order. Importantly, these temporal dynamics were both dependent on whether these context features were in the focus of one’s attention, and preserved across age, despite age-related context memory impairments. These novel results support the idea that episodic memories are encoded and retrieved successively, likely dependent on the input and output pathways of the medial temporal lobe (MTL), and attentional influences that bias activity within these pathways across age.
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spelling pubmed-78774652021-02-12 Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan Mirjalili, Soroush Powell, Patrick Strunk, Jonathan James, Taylor Duarte, Audrey eNeuro Research Article: New Research Episodic memories are multidimensional, including simple and complex features. How we successful encode and recover these features in time, whether these temporal dynamics are preserved across age, even under conditions of reduced memory performance, and the role of attention on these temporal dynamics is unknown. In the current study, we applied time-resolved multivariate decoding to oscillatory electroencephalography (EEG) in an adult lifespan sample to investigate the temporal order of successful encoding and recognition of simple and complex perceptual context features. At encoding, participants studied pictures of black and white objects presented with both color (low-level/simple) and scene (high-level/complex) context features and subsequently made context memory decisions for both features. Attentional demands were manipulated by having participants attend to the relationship between the object and either the color or scene while ignoring the other context feature. Consistent with hierarchical visual perception models, simple visual features (color) were successfully encoded earlier than were complex features (scenes). These features were successfully recognized in the reverse temporal order. Importantly, these temporal dynamics were both dependent on whether these context features were in the focus of one’s attention, and preserved across age, despite age-related context memory impairments. These novel results support the idea that episodic memories are encoded and retrieved successively, likely dependent on the input and output pathways of the medial temporal lobe (MTL), and attentional influences that bias activity within these pathways across age. Society for Neuroscience 2021-01-21 /pmc/articles/PMC7877465/ /pubmed/33436445 http://dx.doi.org/10.1523/ENEURO.0387-20.2020 Text en Copyright © 2021 Mirjalili et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
spellingShingle Research Article: New Research
Mirjalili, Soroush
Powell, Patrick
Strunk, Jonathan
James, Taylor
Duarte, Audrey
Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan
title Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan
title_full Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan
title_fullStr Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan
title_full_unstemmed Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan
title_short Context Memory Encoding and Retrieval Temporal Dynamics are Modulated by Attention across the Adult Lifespan
title_sort context memory encoding and retrieval temporal dynamics are modulated by attention across the adult lifespan
topic Research Article: New Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7877465/
https://www.ncbi.nlm.nih.gov/pubmed/33436445
http://dx.doi.org/10.1523/ENEURO.0387-20.2020
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