Evidence map›Paper›PMID 30109194›Full record

ArticleNeuroImage. Clinical2018

Connecting occipital alpha band peak frequency, visual temporal resolution, and occipital GABA levels in healthy participants and hepatic encephalopathy patients.

Thomas J Baumgarten, Julia Neugebauer, Georg Oeltzschner, Nur-Deniz Füllenbach, Gerald Kircheis, Dieter Häussinger, Joachim Lange, Hans-Jörg Wittsack, Markus Butz, Alfons Schnitzler

Open access · goldAbstract read
In one paragraph

Article in NeuroImage. Clinical, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.3field-weighted citation impact, top 21% 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

13 citing papers in PubMed, 27 citations in OpenAlex.

  1. Article
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  7. Hepatic encephalopathy.Nature reviews. Disease primers · 2022
    Review
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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 3 institutions in 2 countries.

Thomas J BaumgartenInstitute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany; Neuroscience Institute, New York University Langone Medical Center, New York, NY, USA. Electronic address: Thomas.Baumgarten@nyumc.org.
Julia NeugebauerInstitute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Georg OeltzschnerRussell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, USA; F.M. Kirby Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA.
Nur-Deniz FüllenbachDepartment of Gastroenterology, Hepatology and Infectiology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Gerald KircheisDepartment of Gastroenterology, Hepatology and Infectiology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Dieter HäussingerDepartment of Gastroenterology, Hepatology and Infectiology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Joachim LangeInstitute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Hans-Jörg WittsackDepartment of Diagnostic and Interventional Radiology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Markus ButzInstitute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Alfons SchnitzlerInstitute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany.
Heinrich Heine University Düsseldorf · DEKennedy Krieger Institute · USNYU Langone Health · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Recent studies have proposed a connection between the individual alpha band peak frequency and the temporal resolution of visual perception in healthy human participants. This connection rests on animal studies describing oscillations in the alpha band as a mode of phasic thalamocortical information transfer for low-level visual stimuli, which critically relies on GABAergic interneurons. Here, we investigated the interplay of these parameters by measuring occipital alpha band peak frequency by means of magnetoencephalography, visual temporal resolution by means of behavioral testing, and occipital GABA levels by means of magnetic resonance spectroscopy. Importantly, we investigated a sample of healthy participants and patients with varying grades of hepatic encephalopathy, which are known to exhibit decreases in the investigated parameters, thus providing an increased parameter space. We found that occipital alpha band peak frequency and visual temporal resolution were positively correlated, i.e., higher occipital alpha band peak frequencies were on average related to a higher temporal resolution. Likewise, occipital alpha band peak frequency correlated positively with occipital GABA levels. However, correlations were significant only when both healthy participants and patients were included in the analysis, thereby indicating a connection of the measures on group level (instead of the individual level). These findings provide new insights into neurophysiological and neurochemical underpinnings of visual perception.

Indexed as

AgedAlpha RhythmFemalegamma-Aminobutyric AcidHealthy VolunteersHepatic EncephalopathyHumansMagnetic Resonance SpectroscopyMagnetoencephalographyMaleMiddle AgedOccipital LobePhotic StimulationVisual Perceptiongamma-Aminobutyric AcidAlpha oscillationsCFF, Critical flicker frequencyCSD, Cross-spectral densityEC, Eyes-closedECG, Electro-cardiogramEO, Eyes-openEOG, Electro-oculogramGABAGABA+/Cr, GABA-to creatine -ratioGABA, γ-aminobutyric acidHE1, Clinically manifest HE grade 1HE, Hepatic encephalopathyHepatic encephalopathyHPI, Head position indicationICA, Independent component analysisMagnetic resonance spectroscopyMagnetoencephalographyMEG, MagnetoencephalographymHE, Minimal HEMNI, Montreal Neurological InstituteMRS, Magnetic resonance spectroscopyPeak frequency

Identifiers

PMID30109194
PMCPMC6090010
OpenAlexW2887965410

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.