Evidence map›Paper›PMID 36178910›Full record

ArticlePloS one2022

Alternating hemiplegia of childhood: An electroclinical study of sleep and hemiplegia.

Josephine Poole, Sara Zagaglia, Rita Demurtas, Fiona Farrell, Matthew C Walker, Sanjay M Sisodiya, Simona Balestrini, Umesh Vivekananda

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
0.5field-weighted citation impact, top 40% 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

4 citing papers in PubMed, 4 citations in OpenAlex.

  1. Article
  2. Article
  3. Alternating Hemiplegia of Childhood andNeurology. Genetics · 2025
    Article
  4. Article
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 at 3 institutions in 2 countries.

Josephine PooleDepartment of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom.
Sara ZagagliaDepartment of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom.
Rita DemurtasNeurology and Stroke Unit, Azienda Ospedaliera SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy.
Fiona FarrellDepartment of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom.
Matthew C WalkerDepartment of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom.
Sanjay M SisodiyaDepartment of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom.
Simona BalestriniDepartment of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom.
Umesh VivekanandaDepartment of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, United Kingdom.ORCID 0000-0001-6116-2335
National Hospital for Neurology and Neurosurgery · GBAzienda Ospedaliera Nazionale SS. Antonio e Biagio e Cesare Arrigo · ITMeyer Children's Hospital · IT

Funding

Medical Research Council MR/T033150/1MRF_ MRF-001-0016-RG-VIVE-C0934
6 · The paper itself

Abstract

objectiveAlternating Hemiplegia of Childhood (AHC) is characterised by paroxysmal hemiplegic episodes and seizures. Remission of hemiplegia upon sleep is a clinical diagnostic feature of AHC. We investigated whether: 1) Hemiplegic events are associated with spectral EEG changes 2) Sleep in AHC is associated with clinical or EEG spectral features that may explain its restorative effect.

methodsWe retrospectively performed EEG spectral analysis in five adults with AHC and twelve age-/gender-matched epilepsy controls. Five-minute epochs of hemiplegic episodes and ten-minute epochs of four sleep stages were selected from video-EEGs. Arousals were counted per hour of sleep.

resultsWe found 1) hemispheric differences in pre-ictal and ictal spectral power (p = 0.034), during AHC hemiplegic episodes 2) 22% reduced beta power (p = 0.017) and 26% increased delta power (p = 0.025) during wakefulness in AHC versus controls. There were 98% more arousals in the AHC group versus controls (p = 0.0003).

conclusionsThere are hemispheric differences in spectral power preceding hemiplegic episodes in adults with AHC, and sleep is disrupted. SIGNIFICANCE: Spectral EEG changes may be a potential predictive tool for AHC hemiplegic episodes. Significantly disrupted sleep is a feature of AHC.

Indexed as

ElectroencephalographyHemiplegiaAdultHumansRetrospective StudiesSleep StagesSodium-Potassium-Exchanging ATPaseSodium-Potassium-Exchanging ATPase

Identifiers

PMID36178910
PMCPMC9524638
OpenAlexW4298086804

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.