Evidence map›Paper›PMID 30250863›Full record

ArticleAnnals of clinical and translational neurology2018

Physiological and pathological high frequency oscillations in focal epilepsy.

Jan Cimbalnik, Benjamin Brinkmann, Vaclav Kremen, Pavel Jurak, Brent Berry, Jamie Van Gompel, Matt Stead, Greg Worrell

Open access · goldAbstract read
In one paragraph

Article in Annals of clinical and translational neurology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed, 1 pooled it
5.7field-weighted citation impact, top 3% 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

64 citing papers in PubMed, 1 synthesis or guideline pooled it, 109 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Internal and external validation of comprehensive high-frequency activity biomarkers for epilepsy surgery.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2026
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4 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

8 authors at 3 institutions in 2 countries.

Jan CimbalnikMayo Systems Electrophysiology Laboratory Department of Neurology Mayo Clinic 200 First St SW Rochester Minnesota 55905.
Benjamin BrinkmannMayo Systems Electrophysiology Laboratory Department of Neurology Mayo Clinic 200 First St SW Rochester Minnesota 55905.
Vaclav KremenMayo Systems Electrophysiology Laboratory Department of Neurology Mayo Clinic 200 First St SW Rochester Minnesota 55905.
Pavel JurakInternational Clinical Research Center St. Anne's University Hospital Brno Czech Republic.
Brent BerryMayo Systems Electrophysiology Laboratory Department of Neurology Mayo Clinic 200 First St SW Rochester Minnesota 55905.
Jamie Van GompelDepartment of Neurosurgery Mayo Clinic 200 First St SW Rochester Minnesota 55905.
Matt SteadMayo Systems Electrophysiology Laboratory Department of Neurology Mayo Clinic 200 First St SW Rochester Minnesota 55905.
Greg WorrellMayo Systems Electrophysiology Laboratory Department of Neurology Mayo Clinic 200 First St SW Rochester Minnesota 55905.
Mayo Clinic · USSt. Anne's University Hospital Brno · CZWinnMed · US

Funding

Microscale EEG interictal dynamics & transition into seizure in humans & animalsR01NS078136 · NINDS · MAYO CLINIC ROCHESTER · PI STEAD, SQUIRE MATT · 2012 to 2016
$1.7M
Microseizures, Ultra-slow & High Frequency Oscillations: Biomarkers of epilepsyR01NS063039 · NINDS · MAYO CLINIC ROCHESTER · PI WORRELL, GREGORY A · 2009 to 2013
$1.5M
NINDS NIH HHS R01 NS063039NINDS NIH HHS R01 NS078136
6 · The paper itself

Abstract

objectiveThis study investigates high-frequency oscillations (HFOs; 65-600 Hz) as a biomarker of epileptogenic brain and explores three barriers to their clinical translation: (1) Distinguishing pathological HFOs (pathHFO) from physiological HFOs (physHFO). (2) Classifying tissue under individual electrodes as epileptogenic (3) Reproducing results across laboratories.

methodsWe recorded HFOs using intracranial EEG (iEEG) in 90 patients with focal epilepsy and 11 patients without epilepsy. In nine patients with epilepsy putative physHFOs were induced by cognitive or motor tasks. HFOs were identified using validated detectors. A support vector machine (SVM) using HFO features was developed to classify tissue under individual electrodes as normal or epileptogenic.

resultsThere was significant overlap in the amplitude, frequency, and duration distributions for spontaneous physHFO, task induced physHFO, and pathHFO, but the amplitudes of the pathHFO were higher (

interpretationA broader range of interictal pathHFO (65-600 Hz) than previously recognized are biomarkers of epileptogenic brain, and are associated with SOZ and surgical outcome. Classification of HFOs into physiological or pathological remains challenging. Classification of tissue under individual electrodes was demonstrated to be feasible. The open source data and algorithms provide a resource for future studies.

Identifiers

PMID30250863
PMCPMC6144446
OpenAlexW2886427395

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.