Evidence map›Paper›PMID 33981973›Full record

ArticleiScience2021

EEG alterations during wake and sleep in mild cognitive impairment and Alzheimer's disease.

Aurora D'Atri, Serena Scarpelli, Maurizio Gorgoni, Ilaria Truglia, Giulia Lauri, Susanna Cordone, Michele Ferrara, Camillo Marra, Paolo Maria Rossini, Luigi De Gennaro

Open access · goldAbstract read
In one paragraph

Article in iScience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 1 pooled it
6.9field-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

47 citing papers in PubMed, 1 synthesis or guideline pooled it, 84 citations in OpenAlex.

  1. Pooled it
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  13. Tauopathy after long-term cervical lymphadenectomy.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
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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

10 authors at 5 institutions in 1 country.

Aurora D'AtriDepartment of Psychology, University of Rome "Sapienza", Via dei Marsi, 78, Rome 00185, Italy.
Serena ScarpelliIRCCS Fondazione Santa Lucia, Rome, Italy.
Maurizio GorgoniDepartment of Psychology, University of Rome "Sapienza", Via dei Marsi, 78, Rome 00185, Italy.
Ilaria TrugliaDepartment of Psychology, University of Rome "Sapienza", Via dei Marsi, 78, Rome 00185, Italy.
Giulia LauriDepartment of Psychology, University of Rome "Sapienza", Via dei Marsi, 78, Rome 00185, Italy.
Susanna CordoneDepartment of Psychology, University of Rome "Sapienza", Via dei Marsi, 78, Rome 00185, Italy.
Michele FerraraDepartment of Biotechnological and Applied Clinical Sciences, University of L'Aquila, Coppito (L'Aquila) 67100, Italy.
Camillo MarraFoundation Policlinico Universitario Agostino Gemelli IRCCS - Department of aging, neuroscience, orthopaedic and head-neck, Rome 00168, Italy.
Paolo Maria RossiniDepartment of Neuroscience & Neurorehabil., IRCCS San Raffaele-Pisana, Rome, 00163, Italy.
Luigi De GennaroDepartment of Psychology, University of Rome "Sapienza", Via dei Marsi, 78, Rome 00185, Italy.
Sapienza University of Rome · ITUniversity of L'Aquila · ITAgostino Gemelli University Polyclinic · ITFondazione Santa Lucia · ITIRCCS Ospedale San Raffaele · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Patients with Alzheimer's disease (AD) undergo a slowing of waking electroencephalographic (EEG) rhythms since prodromal stages, which could be ascribed to poor sleep quality. We examined the relationship between wake and sleep alterations by assessing EEG activity during sleep and (pre-sleep/post-sleep) wakefulness in AD, mild cognitive impairment (MCI) and healthy controls. AD and MCI show high sleep latency and less slow-wave sleep. Reduced sigma activity characterizes non-rapid eye movement (NREM) sleep, reflecting sleep spindles loss. The EEG slowing characterizes REM sleep and wakefulness of AD and MCI, with strong correlations among the two phenomena suggesting common neuropathological mechanisms. Evening-to-morning variations in waking EEG revealed the gradual disappearance in MCI and AD of overnight changes in delta activity, indicating a progressive decay of sleep restorative functions on diurnal activity that correlates with the impairment of sleep high-frequency activity in AD. Our findings support a linkage between wake and sleep alterations, and the importance of sleep-related processes in Alzheimer's disease progression.

Indexed as

ChronobiologyCognitive NeuroscienceHuman Physiology

Identifiers

PMID33981973
PMCPMC8086022
OpenAlexW3151084972

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.