Related Experiment Video
Updated: Jul 26, 2025
08:20
Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
Published on: October 2, 2019
12.0K
Targeted memory reactivation in human REM sleep elicits detectable reactivation.
Mahmoud E A Abdellahi1, Anne C M Koopman1, Matthias S Treder2
1School of Psychology, Cardiff University Brain Research Imaging Centre (CUBRIC), Cardiff, United Kingdom.
Elife
|June 23, 2023
Summary
This study provides the first evidence of memory reactivation during rapid eye movement (REM) sleep in humans. Targeted memory reactivation (TMR) during REM sleep was linked to improved performance, suggesting REM sleep plays a role in memory consolidation.
Area of Science:
- Neuroscience
- Sleep Science
- Cognitive Psychology
Background:
- Memory reactivation is established in non-REM sleep.
- Its occurrence during REM sleep remains a significant debate in sleep research.
Purpose of the Study:
- To investigate memory reactivation during REM sleep using targeted memory reactivation (TMR).
- To determine if TMR in REM sleep influences performance based on wakeful learning.
Main Methods:
- Utilized targeted memory reactivation (TMR) by pairing auditory cues with learned material during wakefulness.
- Re-presented auditory cues during subsequent REM sleep to probe memory reactivation.
- Employed machine learning classifiers to detect task-related motor imagery reactivation in REM sleep.
Main Results:
- Successfully detected reactivation of task-related motor imagery from wakefulness in human REM sleep.
- The strength of detected memory reactivation positively correlated with overnight performance improvements.
Conclusions:
- Provides the first direct evidence for memory reactivation in human REM sleep via TMR.
- Suggests that REM sleep contributes to memory consolidation processes, particularly those involving motor imagery.
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