The relationship between episodic detail generation and anterotemporal, posteromedial, and hippocampal white matter tracts.
Autobiographical memory
Diffusion
Episodic memory
Hippocampus
Journal
Cortex; a journal devoted to the study of the nervous system and behavior
ISSN: 1973-8102
Titre abrégé: Cortex
Pays: Italy
ID NLM: 0100725
Informations de publication
Date de publication:
02 2020
02 2020
Historique:
received:
05
02
2019
revised:
23
05
2019
accepted:
24
10
2019
pubmed:
30
11
2019
medline:
27
5
2021
entrez:
30
11
2019
Statut:
ppublish
Résumé
Episodic details populate autobiographical memories with vivid representations of people, objects, and event happenings, and they link events to a specific time and place. Episodic detail generation is believed to be a function of medial temporal lobe (MTL)-cortical interaction, but much remains unclear about how this retrieval process unfolds. In the present study, we combined an autobiographical interview and diffusion magnetic resonance imaging to investigate the relationships of two types of episodic detail, namely details about entities of an event (people and objects) or "event elements" and details about spatiotemporal context, to the integrity of anterotemporal (uncinate fasciculus; UF) and posteromedial (cingulum bundle; CB) cortical pathways. We also measured the relationships of these detail types to the fornix, and the relationship between non-episodic details and these tracts. We found that only episodic detail generation was significantly related to cortical and hippocampal pathways. Notably, the UF was more strongly related to event element details than it was to spatiotemporal context details. In contrast, CB was significantly and similarly related to the generation of event element and spatiotemporal context details (when not controlling for age and global diffusion). The fornix was also significantly related to both types of episodic detail, although the relationship to spatiotemporal context was particularly robust. These findings support the idea that anterotemporal cortical regions are related to the retrieval of episodic details about the entities that are incorporated into autobiographical events. Our findings also align with the notion that posteromedial and hippocampal-cortical involvement support the retrieval of episodic details.
Identifiants
pubmed: 31783222
pii: S0010-9452(19)30363-6
doi: 10.1016/j.cortex.2019.10.010
pmc: PMC6984983
mid: NIHMS1062905
pii:
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
124-140Subventions
Organisme : NIA NIH HHS
ID : P30 AG019610
Pays : United States
Organisme : NIA NIH HHS
ID : R03 AG060271
Pays : United States
Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.
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