Representational dynamics of memories for real-life events

[en] The continuous flow of experience that characterizes real-life events is not recorded as such in episodic memory but is condensed as a succession of event segments separated by temporal discontinuities. To unravel the neural basis of this representational structure, we recorded real-life events using wearable camera technology and used fMRI to investigate brain activity during their temporal unfolding in memory. We found that, compared to the representation of static scenes in memory, dynamically unfolding memory representations were associated with greater activation of the posterior medial episodic network. Strikingly, by analyzing the autocorrelation of brain activity patterns at successive time points throughout the retrieval period, we found that this network showed higher temporal dynamics when recalling events that included a higher density of event segments. These results reveal the key role of the posterior medial network in representing the dynamic unfolding of the event segments that constitute real-world memories.

Research Center/Unit :

PsyNCog - Psychologie et Neuroscience Cognitives - ULiège

Disciplines :

Theoretical & cognitive psychology
Neurosciences & behavior

Author, co-author :

Jeunehomme, Olivier ^✱; Université de Liège - ULiège > Département de Psychologie

Heinen, Rebekka ^✱; Ruhr University Bochum > Faculty of Psychology > Department of Neuropsychology, Institute of Cognitive Neuroscience

Stawarczyk, David ; Université de Liège - ULiège > Département de Psychologie ; Université de Liège - ULiège > Psychologie et Neuroscience Cognitives (PsyNCog)

Axmacher, Nikolai; Ruhr University Bochum > Faculty of Psychology > Department of Neuropsychology, Institute of Cognitive Neuroscience

D'Argembeau, Arnaud ; Université de Liège - ULiège > Département de Psychologie ; Université de Liège - ULiège > Psychologie et Neuroscience Cognitives (PsyNCog)

^✱ These authors have contributed equally to this work.

Language :

English

Title :

Representational dynamics of memories for real-life events

Publication date :

2022

Journal title :

iScience

eISSN :

2589-0042

Publisher :

Elsevier, Cambridge, United States - Massachusetts

Volume :

Issue :

Pages :

105391

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://doi.org/10.1101/2022.02.18.480992

Data Set :

Behavioral data and Code

Available on ORBi :

since 20 October 2022

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