Evidence map›Paper›PMID 25697588›Full record

ArticleBrain stimulation

Cross-hemispheric Alternating Current Stimulation During a Nap Disrupts Slow Wave Activity and Associated Memory Consolidation.

Peter Garside, Joseph Arizpe, Chi-Ieong Lau, Crystal Goh, Vincent Walsh

Open access · hybridAbstract read
In one paragraph

Article in Brain stimulation. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
4.0field-weighted citation impact, top 6% of its field
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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 69 citations in OpenAlex.

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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

5 authors at 2 institutions in 2 countries.

Peter GarsideInstitute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK; University College London Medical School, Gower Street, London WC1E 6BT, UK.
Joseph ArizpeInstitute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK; National Institute of Mental Health, National Institutes of Health, 9000 Rockville Pike, Bethesda, MD 20892, USA. Electronic address: Joseph.Arizpe.10@ucl.ac.uk.
Chi-Ieong LauInstitute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK; Department of Neurology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.
Crystal GohInstitute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK.
Vincent WalshInstitute of Cognitive Neuroscience, University College London, 17 Queen Square, London WC1N 3AR, UK.
National Hospital for Neurology and Neurosurgery · GBNational Institutes of Health · US

Funding

Intramural NIH HHSMedical Research Council G0700929PHS HHS NCT00001360
6 · The paper itself

Abstract

backgroundSlow Wave Activity (SWA), the low frequency (<4 Hz) oscillations that characterize Slow Wave Sleep (SWS) are thought to relate causally to declarative memory consolidation during nocturnal sleep. Evidence is conflicting relating SWA to memory consolidation during nap however. OBJECTIVE/HYPOTHESIS: We applied transcranial alternating current stimulation (tACS) - which, with a cross-hemispheric electrode montage (F3 and F4 - International 10:20 EEG system), is able to disrupt brain oscillations-to determine if disruption of low frequency oscillation generation during afternoon nap is causally related to disruption in declarative memory consolidation.

methodsEight human subjects each participated in stimulation and sham nap sessions. A verbal paired associate learning (PAL) task measured memory changes. During each nap period, five 5-min stimulation (0.75 Hz cross-hemispheric frontal tACS) or sham intervals were applied with 1-min post-stimulation intervals (PSI's). Spectral EEG power for Slow (0.7-0.8 Hz), Delta (1.0-4.0 Hz), Theta (4.0-8.0 Hz), Alpha (8.0-12.0 Hz), and Spindle-range (12.0-14.0) frequencies was analyzed during the 1-min preceding the onset of stimulation and the 1-min PSI's.

resultsAs hypothesized, power reduction due to stimulation positively correlated with reduction in word-pair recall post-nap specifically for Slow (P < 0.0022) and Delta (P < 0.037) frequency bands.

conclusionsThese results provide preliminary evidence suggesting a causal and specific role of SWA in declarative memory consolidation during nap.

Indexed as

Transcranial Direct Current StimulationAssociation LearningBrainFemaleHumansMaleMemory ConsolidationSleepYoung AdultDeclarative memoryDelta waveMemory consolidationMontageNapOscillationsSleepSlow wave sleeptACS

Identifiers

PMID25697588
PMCPMC4464303
OpenAlexW2080644894

What OpenQuestion holds

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LicenceCC BY
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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.