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Current Sleep Medicine Reports
Published in: Current Sleep Medicine Reports 2/2024

Open Access 18-03-2024 | REVIEW

Electrophysiological Mechanisms of Memory Consolidation in Human Non-rapid Eye Movement Sleep

Authors: Dan Denis, Scott A. Cairney

Published in: Current Sleep Medicine Reports | Issue 2/2024

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Abstract

Purpose of Review

Pioneering work in rodents has shown that the reactivation of recently acquired memories during sleep is a key mechanism underlying the beneficial effect of sleep on memory consolidation. In this review, we consider recent evidence of memory reactivation processes in human sleep.

Recent Findings

The precise temporal coupling of sleep spindles to slow oscillations during non-rapid eye movement sleep plays a central role in sleep-associated memory consolidation. Both correlational studies and studies directly manipulating oscillatory activity in the sleeping brain have confirmed that spindles coupled to slow oscillations are better predictors of memory than uncoupled spindles and that the greatest memory benefit comes when spindles are tightly coupled to the up-state of the slow oscillation. Recent evidence suggests that memory content is reactivated during sleep, with a functional benefit for memory performance after sleep. Reactivation events are time-locked around slow oscillation-spindle coupling events, as well as sharp-wave ripples in hippocampus.

Summary

Memory reactivation, which is facilitated by slow oscillation-spindle coupling events, can be observed during human sleep and shows promise as a prime mechanism underlying sleep’s beneficial effects on memory.
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Metadata
Title
Electrophysiological Mechanisms of Memory Consolidation in Human Non-rapid Eye Movement Sleep
Authors
Dan Denis
Scott A. Cairney
Publication date
18-03-2024
Publisher
Springer International Publishing
Published in
Current Sleep Medicine Reports / Issue 2/2024
Electronic ISSN: 2198-6401
DOI
https://doi.org/10.1007/s40675-024-00291-y

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