Evidence map›Paper›PMID 33923317›Full record

ArticleBrain sciences2021

Distinction of Physiologic and Epileptic Ripples: An Electrical Stimulation Study.

Jan Schönberger, Anja Knopf, Kerstin Alexandra Klotz, Matthias Dümpelmann, Andreas Schulze-Bonhage, Julia Jacobs

Open access · goldAbstract read
In one paragraph

Article in Brain sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
1.1field-weighted citation impact, top 25% 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

7 citing papers in PubMed, 11 citations in OpenAlex.

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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

6 authors at 1 institution in 2 countries.

Jan SchönbergerEpilepsy Center, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
Anja KnopfEpilepsy Center, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
Kerstin Alexandra KlotzEpilepsy Center, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
Matthias DümpelmannEpilepsy Center, Medical Center, University of Freiburg, 79106 Freiburg, Germany.ORCID 0000-0002-1476-7777
Andreas Schulze-BonhageEpilepsy Center, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
Julia JacobsDepartment of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
University of Freiburg · DE

Funding

Deutsche Forschungsgemeinschaft JA 1725/4-1Faculty of Medicine, University of Freiburg Berta-Ottenstein-Program for Clinician Scientists
6 · The paper itself

Abstract

Ripple oscillations (80-250 Hz) are a promising biomarker of epileptic activity, but are also involved in memory consolidation, which impairs their value as a diagnostic tool. Distinguishing physiologic from epileptic ripples has been particularly challenging because usually, invasive recordings are only performed in patients with refractory epilepsy. Here, we identified 'healthy' brain areas based on electrical stimulation and hypothesized that these regions specifically generate 'pure' ripples not coupled to spikes. Intracranial electroencephalography (EEG) recorded with subdural grid electrodes was retrospectively analyzed in 19 patients with drug-resistant focal epilepsy. Interictal spikes and ripples were automatically detected in slow-wave sleep using the publicly available Delphos software. We found that rates of spikes, ripples and ripples coupled to spikes ('spike-ripples') were higher inside the seizure-onset zone (

Indexed as

electroencephalographyepilepsyhigh-frequency oscillationsintracranialneocorticalphysiologicstimulation

Identifiers

PMID33923317
PMCPMC8146715
OpenAlexW3157589650

What OpenQuestion holds

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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.