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Related Concept Videos

Interference and Decay01:16

Interference and Decay

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Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
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Dissociative Amnesia

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Dissociative amnesia is a complex psychological condition that manifests as an inability to recall personal information, often tied to traumatic or stressful events. Unlike general amnesia, individuals with this condition retain the ability to perform routine activities and procedural tasks, such as operating a phone or navigating public transportation, yet experience profound gaps in autobiographical memory. These lapses may encompass significant life events, such as suicide attempts or...
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Implicit Memories01:24

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Implicit memories, also known as non-declarative memories, are long-term memories that function outside of conscious awareness. These memories influence behavior and skills without explicit knowledge. This type of memory is evident in tasks like playing tennis, snowboarding, and texting. Implicit memory has three subsystems: procedural memory, conditioning, and priming. This type of memory is essential in various activities, from everyday tasks to specialized skills.
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Amnesia01:13

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Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
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Repressed Memory01:16

Repressed Memory

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Repressed memories are a psychological phenomenon where memories of traumatic events are unconsciously blocked from a person's awareness. This process occurs as a defense mechanism, protecting the mind from the emotional impact of distressing or painful experiences. For example, a person who has experienced childhood trauma may grow up with no conscious recollection of the event. In such cases, the memories are thought to be buried deep within the subconscious, inaccessible to the conscious...
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False Memories01:18

False Memories

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False memories represent a cognitive distortion in which individuals recall events that did not happen, or remember them in an altered form. This phenomenon highlights the brain's constructive nature in processing and recalling memories, emphasizing that memory is not a perfect representation of past events but rather a dynamic reconstruction influenced by various factors.
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Related Experiment Video

Updated: Nov 30, 2025

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
11:17

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear

Published on: August 24, 2012

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Apparent reconsolidation interference without generalized amnesia.

Joaquín M Alfei1, Hérnan De Gruy2, Dimitri De Bundel3

  • 1Faculty of Psychology and Educational Sciences, KU Leuven, 3000 Leuven, Belgium; Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium.

Progress in Neuro-Psychopharmacology & Biological Psychiatry
|November 13, 2020
PubMed
Summary
This summary is machine-generated.

Drug-induced amnesia can occur when memories are reactivated by a generalized context. This amnesia depends on prediction error and can be blocked by targeting specific NMDA receptors, suggesting a destabilization mechanism.

Keywords:
IfenprodilMemory generalizationMemory reconsolidationMidazolamPost-reactivation amnesia

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Area of Science:

  • Neuroscience
  • Behavioral Neuroscience
  • Molecular Neuroscience

Background:

  • Memories are dynamic and can be destabilized after reactivation, making them vulnerable to amnesia.
  • Post-reactivation amnesia has been studied using direct stimulus reactivation (AAA design).
  • Recent work showed amnesia in a generalization stimulus (GS) reactivation paradigm (ABB design).

Purpose of the Study:

  • To investigate if GS-mediated (ABB) amnesia shares features with cue-mediated (AAA) amnesia, specifically destabilization.
  • To explore the role of prediction error and temporal dynamics in ABB amnesia.
  • To examine the involvement of GluN2B-NMDA receptors in ABB amnesia.

Main Methods:

  • Contextual fear conditioning in rats.
  • Midazolam (MDZ) as the amnestic agent.
  • Testing memory reactivation with original (ABA), generalized (ABB), and novel (ABC) stimuli.
  • Administration of ifenprodil, a GluN2B-NMDA receptor antagonist, before reactivation.

Main Results:

  • ABB post-reactivation amnesia is dependent on prediction error during reactivation.
  • The amnesia exhibits a temporally graded effect.
  • Pre-reactivation ifenprodil administration prevents MDZ-induced ABB amnesia.
  • ABB amnesia is prevented when tested with the original stimulus (ABA) or a novel stimulus (ABC).

Conclusions:

  • GS-mediated (ABB) post-reactivation amnesia shares key features with cue-mediated (AAA) amnesia, indicating a destabilization-dependent process.
  • Prediction error at reactivation is crucial for ABB amnesia.
  • GluN2B-NMDA receptor activity is implicated in the destabilization underlying ABB amnesia.