Evidence map›Paper›PMID 36905173›Full record

ArticlePhysiological reports2023

Vagus nerve stimulation parameters evoke differential neuronal responses in the locus coeruleus.

Ariana Farrand, Vincent Jacquemet, Ryan Verner, Misty Owens, Eric Beaumont

Open access · goldFull text read
In one paragraph

Article in Physiological reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 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

5 authors at 3 institutions in 2 countries.

Ariana FarrandDepartment of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA.
Vincent JacquemetDepartment of Pharmacology and Physiology, Institute of Biomedical Engineering, University of Montreal, Montreal, Quebec, Canada.
Ryan VernerNeuromodulation Division, LivaNova PLC, Houston, Texas, USA.
Misty OwensDepartment of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA.
Eric BeaumontDepartment of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, USA.ORCID 0000-0003-2907-7768
East Tennessee State University · USHôpital du Sacré-Cœur de Montréal · CALivaNova (United States) · US

Funding

Afferent Mechanisms of Vagal Neuromodulation TherapyR01HL141560 · NHLBI · EAST TENNESSEE STATE UNIVERSITY · PI Eric Beaumont · 2018 to 2026
$4.5M
NHLBI NIH HHS R01 HL141560
6 · The paper itself

Abstract

Vagus nerve stimulation (VNS) is used to treat drug-resistant epilepsy and depression, with additional applications under investigation. The noradrenergic center locus coeruleus (LC) is vital for VNS effects; however, the impact of varying stimulation parameters on LC activation is poorly understood. This study characterized LC activation across VNS parameters. Extracellular activity was recorded in rats' left LC while 11 VNS paradigms, utilizing variable frequencies and bursting characteristics, were pseudorandomly delivered to the left cervical vagus for five cycles. Neurons' change from baseline firing rate and timing response profiles were assessed. The proportion of neurons categorized as responders over 5 VNS cycles doubled in comparison to the first VNS cycle (p < 0.001) for all VNS paradigms, demonstrating an amplification effect. The percentage of positively consistent/positive responders increased for standard VNS paradigms with frequencies ≥10 Hz and for bursting paradigms with shorter interburst intervals and more pulses per burst. The synchrony between pairs of LC neurons increased during bursting VNS but not standard paradigms. Also, the probability of evoking a direct response during bursting VNS was higher with longer interburst intervals and a higher number of pulses per burst. Standard paradigms between 10-30 Hz best positively activates LC with consistency to VNS while the best bursting paradigm to increase activity was 300 Hz, seven pulses per burst separated by 1 s. Bursting VNS was effective in increasing synchrony between pairs of neurons, suggesting a common network recruitment originating from vagal afferents. These results indicate differential activation of LC neurons depending on the VNS parameters delivered.

Indexed as

Vagus Nerve StimulationAnimalsLocus CoeruleusNeuronsNorepinephrineRatsVagus NerveNorepinephrinebursting paradigmin vivo electrophysiologylocus coeruleusneural activityneuronal synchronyvagus nerve stimulation

Identifiers

PMID36905173
PMCPMC10006695
OpenAlexW4323920952

What OpenQuestion holds

Textfull text, public
LicenceCC BY
measurements read45
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.