Evidence map›Paper›PMID 33710676›Full record

ArticleAnnals of neurology2021

Noninvasive Mapping of Ripple Onset Predicts Outcome in Epilepsy Surgery.

Eleonora Tamilia, Margherita A G Matarrese, Georgios Ntolkeras, P Ellen Grant, Joseph R Madsen, Steve M Stufflebeam, Phillip L Pearl, Christos Papadelis

Open access · greenAbstract read
In one paragraph

Article in Annals of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
6.7field-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

37 citing papers in PubMed, 56 citations in OpenAlex.

  1. Article
  2. Epileptogenicity alters intrahippocampal ripple propagation.medRxiv : the preprint server for health sciences · 2026
    Article
  3. Article
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  6. High-frequency oscillations >250 Hz in people with Down syndrome and associated Alzheimer's disease dementia.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  7. Article
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  14. Use, experience and perspectives of high-density EEG among Italian epilepsy centers: a national survey.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Article
  15. Magnetoencephalography for Epilepsy Presurgical Evaluation.Current neurology and neuroscience reports · 2024
    Review
  16. Networks through the lens of high-frequency oscillations.Frontiers in network physiology · 2024
    Review
  17. Article
  18. Article
  19. Article
  20. Pediatric magnetoencephalography.Annals of the Child Neurology Society · 2023
    Review
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.

Eleonora TamiliaLaboratory of Children's Brain Dynamics, Division of Newborn Medicine, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA.ORCID 0000-0002-1235-3052
Margherita A G MatarreseLaboratory of Children's Brain Dynamics, Division of Newborn Medicine, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA.ORCID 0000-0001-9833-9886
Georgios NtolkerasLaboratory of Children's Brain Dynamics, Division of Newborn Medicine, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA.ORCID 0000-0002-2281-035X
P Ellen GrantFetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children's Hospital, Harvard Medical School, Boston, MA.
Joseph R MadsenEpilepsy Surgery Program, Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, MA.
Steve M StufflebeamAthinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA.
Phillip L PearlDivision of Epilepsy and Clinical Neurophysiology, Department of Neurology, Boston Children's Hospital, Harvard Medical School, Boston, MA.ORCID 0000-0002-6373-1068
Christos PapadelisLaboratory of Children's Brain Dynamics, Division of Newborn Medicine, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA.ORCID 0000-0001-6125-9217
Boston Children's Hospital · USHarvard University · USUniversity of North Texas · US

Funding

Interictal High Frequency Oscillations of Epileptogenecity in Pediatric PatientsR01NS104116 · NINDS · COOK CHILDREN'S MEDICAL CENTER · PI PAPADELIS, CHRISTOS · 2019 to 2024
$2.4M
Interictal High Frequency Oscillations of Epileptogenecity in Pediatric PatientsR21NS101373 · NINDS · COOK CHILDREN'S MEDICAL CENTER · PI PAPADELIS, CHRISTOS, STUFFLEBEAM, STEVEN · 2018 to 2019
$501k
NINDS NIH HHS 7R01NS104116NINDS NIH HHS 7R21NS101373NINDS NIH HHS R01 NS104116NINDS NIH HHS R21 NS101373
6 · The paper itself

Abstract

objectiveIntracranial electroencephalographic (icEEG) studies show that interictal ripples propagate across the brain of children with medically refractory epilepsy (MRE), and the onset of this propagation (ripple onset zone [ROZ]) estimates the epileptogenic zone. It is still unknown whether we can map this propagation noninvasively. The goal of this study is to map ripples (ripple zone [RZ]) and their propagation onset (ROZ) using high-density EEG (HD-EEG) and magnetoencephalography (MEG), and to estimate their prognostic value in pediatric epilepsy surgery.

methodsWe retrospectively analyzed simultaneous HD-EEG and MEG data from 28 children with MRE who underwent icEEG and epilepsy surgery. Using electric and magnetic source imaging, we estimated virtual sensors (VSs) at brain locations that matched the icEEG implantation. We detected ripples on VSs, defined the virtual RZ and virtual ROZ, and estimated their distance from icEEG. We assessed the predictive value of resecting virtual RZ and virtual ROZ for postsurgical outcome. Interictal spike localization on HD-EEG and MEG was also performed and compared with ripples.

resultsWe mapped ripple propagation in all patients with HD-EEG and in 27 (96%) patients with MEG. The distance from icEEG did not differ between HD-EEG and MEG when mapping the RZ (26-27mm, p = 0.6) or ROZ (22-24mm, p = 0.4). Resecting the virtual ROZ, but not virtual RZ or the sources of spikes, was associated with good outcome for HD-EEG (p = 0.016) and MEG (p = 0.047).

interpretationHD-EEG and MEG can map interictal ripples and their propagation onset (virtual ROZ). Noninvasively mapping the ripple onset may augment epilepsy surgery planning and improve surgical outcome of children with MRE. ANN NEUROL 2021;89:911-925.

Indexed as

AdolescentBrain MappingChildChild, PreschoolDrug Resistant EpilepsyElectrocorticographyFemaleHumansMagnetoencephalographyMalePredictive Value of TestsPrognosisProspective StudiesTreatment Outcome

Identifiers

PMID33710676
PMCPMC8229023
OpenAlexW3133560302

What OpenQuestion holds

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LicenceCC BY-NC
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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.