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  Suppression weakens unwanted memories via a sustained reduction of neural reactivation

Meyer, A.-K., & Benoit, R. G. (2022). Suppression weakens unwanted memories via a sustained reduction of neural reactivation. eLife, 11: e71309. doi:10.7554/eLife.71309.

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 Creators:
Meyer, Ann-Kristin1, Author              
Benoit, Roland G.1, Author              
Affiliations:
1Max Planck Research Group Adaptive Memory, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_2295691              

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Free keywords: Forgetting; Human; Memory; Neuroimaging; Neuroscience; Reinstatement; Suppression
 Abstract: Aversive events sometimes turn into intrusive memories. However, prior evidence indicates that such memories can be controlled via a mechanism of retrieval suppression. Here, we test the hypothesis that suppression exerts a sustained influence on memories by deteriorating their neural representations. This deterioration, in turn, would hinder their subsequent reactivation and thus impoverish the vividness with which they can be recalled. In an fMRI study, participants repeatedly suppressed memories of aversive scenes. As predicted, this process rendered the memories less vivid. Using a pattern classifier, we observed that suppression diminished the neural reactivation of scene information both globally across the brain and locally in the parahippocampal cortices. Moreover, the decline in vividness was associated with reduced reinstatement of unique memory representations in right parahippocampal cortex. These results support the hypothesis that suppression weakens memories by causing a sustained reduction in the potential to reactivate their neural representations.

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Language(s): eng - English
 Dates: 2021-06-162022-03-072022-03-30
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.7554/eLife.71309
PMID: 35352679
PMC: PMC8967383
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Title: eLife
Source Genre: Journal
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Publ. Info: Cambridge : eLife Sciences Publications
Pages: - Volume / Issue: 11 Sequence Number: e71309 Start / End Page: - Identifier: ISSN: 2050-084X
CoNE: https://pure.mpg.de/cone/journals/resource/2050-084X