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Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
Published on: August 24, 2012
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Post-conditioning sleep deprivation facilitates delay and trace fear memory extinction.
Daisuke Miyamoto1,2, Mahmoud Abdelmouti Mahmoud3,4,5
1Laboratory for Sleeping-Brain Dynamics, Research Center for Idling Brain Science, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan. miyamoto@cts.u-toyama.ac.jp.
Molecular Brain
|November 29, 2024
Summary
Sleep deprivation impacts fear memory extinction differently based on conditioning type and sex. It aids trace fear extinction but hinders delay fear memory recovery, especially in males, suggesting sex-specific sleep roles in emotional memory processing.
Area of Science:
- Neuroscience
- Behavioral Science
- Sleep Research
Background:
- Trace and delay fear conditioning use distinct memory strategies.
- Sex differences in fear persistence complicate psychiatric treatment.
- The impact of sleep on long-term fear memory processing, particularly in females, is understudied.
Purpose of the Study:
- To investigate the interaction of conditioning type (trace vs. delay), sleep deprivation, and sex on fear memory recall, extinction, and remote recall.
- To clarify how sleep deprivation affects long-term fear memory consolidation and extinction across sexes.
- To explore sex-specific effects of sleep on emotional memory processing.
Main Methods:
- Auditory trace and delay fear conditioning in mice.
- Post-conditioning sleep deprivation (6 hours).
- Assessment of freezing behavior during extinction and remote recall, analyzing interactions between conditioning type, sleep state, and sex.
Main Results:
- Sleep deprivation did not affect delay fear memory extinction training.
- Sleep deprivation prevented spontaneous recovery of delay fear memory in males and reduced it in females.
- Sleep deprivation facilitated trace fear memory extinction in both sexes.
- Sleep deprivation demonstrated both short-term and long-term effects on fear memory extinction, contingent on the conditioning protocol.
Conclusions:
- Sleep deprivation differentially modulates fear memory extinction based on conditioning protocol and sex.
- Findings underscore the importance of long-term memory assessment and sex-specific considerations in understanding emotional memory and sleep.
- Results have implications for individualized treatments for conditions like post-traumatic stress disorder (PTSD).
