Evidence map›Paper›PMID 34158548›Full record

ArticleScientific reports2021

Hippocampus-retrosplenial cortex interaction is increased during phasic REM and contributes to memory consolidation.

Daniel Gomes de Almeida-Filho, Bruna Del Vechio Koike, Francesca Billwiller, Kelly Soares Farias, Igor Rafael Praxedes de Sales, Pierre-Hervé Luppi, Sidarta Ribeiro, Claudio Marcos Queiroz

Abstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Guideline
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  10. Multi-region processing during sleep for memory and cognition.Proceedings of the Japan Academy. Series B, Physical and biological sciences · 2025
    Review
  11. Sleep advances : a journal of the Sleep Research Society · 2025
    Article
  12. Thalamocortical Dynamics during Rapid Eye Movement Sleep in the Mouse Somatosensory Pathway.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Daniel Gomes de Almeida-FilhoBrain Institute, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
Bruna Del Vechio KoikeBrain Institute, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
Francesca BillwillerUMR 5292 CNRS/U1028 INSERM, Center of Research in Neuroscience of Lyon, SLEEP Team, Université Claude Bernard Lyon I, Faculté de Médecine RTH Laennec, Lyon, France.
Kelly Soares FariasBrain Institute, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
Igor Rafael Praxedes de SalesBrain Institute, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
Pierre-Hervé LuppiUMR 5292 CNRS/U1028 INSERM, Center of Research in Neuroscience of Lyon, SLEEP Team, Université Claude Bernard Lyon I, Faculté de Médecine RTH Laennec, Lyon, France.
Sidarta RibeiroBrain Institute, Federal University of Rio Grande do Norte, Natal, RN, Brazil. sidartaribeiro@neuro.ufrn.br.
Claudio Marcos QueirozBrain Institute, Federal University of Rio Grande do Norte, Natal, RN, Brazil. clausqueiroz@neuro.ufrn.br.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hippocampal (HPC) theta oscillation during post-training rapid eye movement (REM) sleep supports spatial learning. Theta also modulates neuronal and oscillatory activity in the retrosplenial cortex (RSC) during REM sleep. To investigate the relevance of theta-driven interaction between these two regions to memory consolidation, we computed the Granger causality within theta range on electrophysiological data recorded in freely behaving rats during REM sleep, both before and after contextual fear conditioning. We found a training-induced modulation of causality between HPC and RSC that was correlated with memory retrieval 24 h later. Retrieval was proportional to the change in the relative influence RSC exerted upon HPC theta oscillation. Importantly, causality peaked during theta acceleration, in synchrony with phasic REM sleep. Altogether, these results support a role for phasic REM sleep in hippocampo-cortical memory consolidation and suggest that causality modulation between RSC and HPC during REM sleep plays a functional role in that phenomenon.

Indexed as

AnimalsGyrus CinguliHippocampusMaleMemoryMemory ConsolidationNeuronsRatsRats, Sprague-DawleySleepSleep, REMTheta RhythmWakefulness

Identifiers

PMID34158548
PMCPMC8219679

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.