Evidence map›Paper›PMID 28928647›Full record

ArticleFrontiers in human neuroscience2017

Individual Differences in Frequency and Topography of Slow and Fast Sleep Spindles.

Roy Cox, Anna C Schapiro, Dara S Manoach, Robert Stickgold

Open access · goldAbstract read
In one paragraph

Article in Frontiers in human neuroscience, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 115 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
115citing papers in PubMed, 2 pooled it
8.0field-weighted citation impact, top 2% 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

115 citing papers in PubMed, 2 syntheses or guidelines pooled it, 204 citations in OpenAlex.

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55 more citing papers are in PubMed but not listed here.

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

4 authors at 3 institutions in 1 country.

Roy CoxDepartment of Psychiatry, Beth Israel Deaconess Medical CenterBoston, MA, United States.
Anna C SchapiroDepartment of Psychiatry, Beth Israel Deaconess Medical CenterBoston, MA, United States.
Dara S ManoachDepartment of Psychiatry, Harvard Medical SchoolBoston, MA, United States.
Robert StickgoldDepartment of Psychiatry, Beth Israel Deaconess Medical CenterBoston, MA, United States.
Harvard University · USBeth Israel Deaconess Medical Center · USMassachusetts General Hospital · US

Funding

Harvard Clinical and Translational Science CenterUL1TR001102 · NCATS · HARVARD MEDICAL SCHOOL · PI NADLER, LEE MARSHALL · 2013 to 2017
$106.2M
The evolution of memories across wake and sleepR01MH048832 · NIMH · HARVARD UNIVERSITY (MEDICAL SCHOOL) · PI STICKGOLD, ROBERT · 1993 to 2018
$8.9M
Sleep-dependent Memory Processing in SchizophreniaR01MH092638 · NIMH · MASSACHUSETTS GENERAL HOSPITAL · PI DARA S MANOACH · 2012 to 2026
$7.4M
Mentoring and Research on Cognitive Deficits in SchizophreniaK24MH099421 · NIMH · MASSACHUSETTS GENERAL HOSPITAL · PI MANOACH, DARA S · 2013 to 2017
$850k
The Role of Sleep in Insight and GeneralizationF32NS093901 · NINDS · BETH ISRAEL DEACONESS MEDICAL CENTER · PI SCHAPIRO, ANNA C · 2016 to 2018
$178k
NCATS NIH HHS UL1 TR001102NIMH NIH HHS K24 MH099421NIMH NIH HHS R01 MH048832NIMH NIH HHS R01 MH092638NINDS NIH HHS F32 NS093901
6 · The paper itself

Abstract

Sleep spindles are transient oscillatory waveforms that occur during non-rapid eye movement (NREM) sleep across widespread cortical areas. In humans, spindles can be classified as either slow or fast, but large individual differences in spindle frequency as well as methodological difficulties have hindered progress towards understanding their function. Using two nights of high-density electroencephalography recordings from 28 healthy individuals, we first characterize the individual variability of NREM spectra and demonstrate the difficulty of determining subject-specific spindle frequencies. We then introduce a novel spatial filtering approach that can reliably separate subject-specific spindle activity into slow and fast components that are stable across nights and across N2 and N3 sleep. We then proceed to provide detailed analyses of the topographical expression of individualized slow and fast spindle activity. Group-level analyses conform to known spatial properties of spindles, but also uncover novel differences between sleep stages and spindle classes. Moreover, subject-specific examinations reveal that individual topographies show considerable variability that is stable across nights. Finally, we demonstrate that topographical maps depend nontrivially on the spindle metric employed. In sum, our findings indicate that group-level approaches mask substantial individual variability of spindle dynamics, in both the spectral and spatial domains. We suggest that leveraging, rather than ignoring, such differences may prove useful to further our understanding of the physiology and functional role of sleep spindles.

Indexed as

EEGgeneralized eigendecompositionindividual differencessleep spindlesspatial filter

Identifiers

PMID28928647
PMCPMC5591792
OpenAlexW2953009208

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.