Evidence map›Paper›PMID 25849807›Full record

Observational studyPloS one2015

Assessment of brainstem function with auricular branch of vagus nerve stimulation in Parkinson's disease.

David Weise, Melanie Adamidis, Fabio Pizzolato, Jost-Julian Rumpf, Christopher Fricke, Joseph Classen

Open access · goldAbstract readComparative StudyObservational Study
In one paragraph

Observational study in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed, 48 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 2 institutions in 2 countries.

David WeiseDepartment of Neurology, University of Leipzig, Leipzig, Germany.
Melanie AdamidisDepartment of Neurology, University of Leipzig, Leipzig, Germany.
Fabio PizzolatoDepartment of Neurology, University of Leipzig, Leipzig, Germany; Department of Neurological, Neuropsychological, Morphological and Movement Sciences, University of Verona, Verona, Italy.
Jost-Julian RumpfDepartment of Neurology, University of Leipzig, Leipzig, Germany.
Christopher FrickeDepartment of Neurology, University of Leipzig, Leipzig, Germany.
Joseph ClassenDepartment of Neurology, University of Leipzig, Leipzig, Germany.
Leipzig University · DEUniversity of Verona · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe efferent dorsal motor nucleus of the vagal nuclei complex may degenerate early in the course of Parkinson's disease (PD), while efferent nucleus ambiguous, the principal source of parasympathetic vagal neurons innervating the heart, and afferent somatosensory nuclei remain intact.

objectiveTo obtain neurophysiological evidence related to this pattern, we tested processing of afferent sensory information transmitted via the auricular branch of the vagus nerve (ABVN) which is known to be connected to autonomic regulation of cardiac rhythm.

methodsIn this cross-sectional observational study, we recorded (i) somatosensory evoked potentials (ABVN-SEP) and (ii) cutaneo-cardioautonomic response elicited by stimulation of the ABVN (modulation of heart-rate variability (HRV index; low frequency power, ln(LF), high frequency power, ln(HF); ln(LF/HF) ratio)) in 50 PD patients and 50 age and sex matched healthy controls. Additionally, auditory evoked potentials and trigeminal nerve SEP were assessed.

resultsNeither ABVN-SEP nor any of the other functional brainstem parameters differed between patients and controls. Although HRV index was decreased in PD patients, modulation of ln(LF/HF) by ABVN-stimulation, likely indicating cardiac parasympathetic activation, did not differ between both groups.

conclusionsFindings do not point to prominent dysfunction of processing afferent information from ABVN and its connected parasympathetic cardiac pathway in PD. They are consistent with the known pattern of degeneration of the vagal nuclei complex of the brainstem.

Indexed as

Brain StemCase-Control StudiesCross-Sectional StudiesEvoked Potentials, SomatosensoryFemaleHumansMaleMiddle AgedParkinson DiseasePrognosisVagus Nerve Stimulation

Identifiers

PMID25849807
PMCPMC4388709
OpenAlexW2018620882

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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.