Cited by 379Memory and Neural MechanismsMemory Processes and InfluencesNeuroscience and Neuropharmacology Research

Characterization of fear memory reconsolidation

Open access
Duvarci, Sevil, Nader, Karim·2004·The Journal of Neuroscience

Abstract

Reactivation of consolidated memories returns them to a protein synthesis-dependent state. One interpretation of these findings is that the memory reconsolidates after use. Two alternative interpretations are that protein synthesis inhibition facilitates extinction and that postreactivation protein synthesis inhibition leads to an inability to retrieve the consolidated memory. First, using two different approaches, we report that reconsolidation cannot be reduced down to facilitated extinction. We show that the reconsolidation deficit does not show renewal after a contextual shift, whereas an extinguished auditory fear memory does under the same conditions and the deficit occurs regardless of whether the memory is reactivated with an extinction [conditioned stimulus (CS) alone] or a reinforced trial (CS-unconditioned stimulus). To address the issue of whether postreactivation anisomycin leads to an inability to retrieve the consolidated memory, we used two traditional assays for retrieval deficits. First, we demonstrate that the amnesia induced by blockade of reconsolidation does not show any spontaneous recovery. Second, we show that application of reminder shock does not result in the reinstatement of the memory. These findings support the idea that reactivation of consolidated memories initiates a second time-dependent memory formation process.

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Crossref · 10.1523/jneurosci.2971-04.2004

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  • Neuroscience has shown that re-accessing memories generally changes them, rather than enforces them.

    “Indeed, neuroscience has shown that re-accessing memories generally changes them, rather than enforces them.66,67”

    From The overfitted brain: Dreams evolved to assist generalization (2021) · cites this paper as [66]

    The Introduction (page not specified) says reactivating a consolidated auditory fear memory makes it labile and requires reconsolidation to restabilize the original memory. The Abstract likewise describes a second memory-formation process after reactivation. Neither passage shows that re-accessing memories generally changes them rather than reinforces them; the paper addresses a specific fear-memory process. (LLM, conf=0.84)

    Experimental — accuracy not yet measured

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Authors
Duvarci, S., & Nader, K.
Affiliations
  • W. M. Keck Foundation (US)
  • McGill University (CA)
Venue
The Journal of Neuroscience
Published
2004-10-20
Volume
24
Issue
42
Pages
9269-9275
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2018795098
Cited by
379
References
39
Citations by year
2026: 2 · 2025: 6 · 2024: 6 · 2023: 13 · 2022: 18 · 2021: 15 · 2020: 14 · 2019: 14 · 2018: 16 · 2017: 22 · 2016: 18 · 2015: 24 · 2014: 23 · 2013: 21 · 2012: 24
FWCI
9.75
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Alfred P. Sloan Foundation
  • Volkswagen Foundation
  • Canadian Institutes of Health Research
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
fear memory reconsolidation, memory reactivation, protein synthesis inhibition, anisomycin, extinction, memory retrieval, memory consolidation, spontaneous recovery, reinstatement, auditory fear conditioning
MeSH terms
Amygdala, Animals, Anisomycin, Conditioning, Psychological, Extinction, Psychological, Fear, Male, Memory, Protein Synthesis Inhibitors, Time Factors, Rats, Sprague-Dawley, Rats

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