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A One-Trial Mouse Model of Highly Stable Trauma-Induced Long-Term Memory.

T A Zamorina1,2, K A Toropova3, O I Ivashkina3

  • 1Institute for Advanced Brain Studies, Moscow State University, Moscow, Russia. tatazamorina@gmail.com.

Doklady Biological Sciences : Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
|December 2, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a new mouse model to study how long-term memories form and persist. This model successfully demonstrated stable memory retention for over six months, offering insights into lifelong memory mechanisms.

Keywords:
aversive memoryfear conditioninglong-term memoryone-trial learningposttraumatic stress disorder

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Area of Science:

  • Neuroscience
  • Memory Research
  • Animal Models

Background:

  • Lifelong memory maintenance is a key unsolved neuroscience problem.
  • Existing models lack the timescale to study long-term memory comparable to lifespan.

Purpose of the Study:

  • To develop a reliable experimental paradigm for investigating lifelong memory mechanisms.
  • To assess the stability of long-term memory over extended periods.

Main Methods:

  • Utilized a contextual fear conditioning paradigm in mice.
  • Adapted the model for posttraumatic stress disorder (PTSD) research.
  • Implemented a one-trial learning model by varying aversive stimulation intensity.

Main Results:

  • Mice reliably formed long-term associative memories.
  • These memories persisted for a minimum of six months.
  • The developed model demonstrated high stability for memory retention.

Conclusions:

  • The new mouse model is a promising tool for studying lifelong memory retention.
  • Enables investigation into molecular and neuronal network mechanisms of enduring memories.
  • Facilitates research on memory stability over timescales relevant to lifespan.