Evidence map›Paper›PMID 34404427›Full record

ArticleJournal of translational medicine2021

Different modulation effects of 1 Hz and 20 Hz transcutaneous auricular vagus nerve stimulation on the functional connectivity of the periaqueductal gray in patients with migraine.

Jin Cao, Yue Zhang, Hui Li, Zhaoxian Yan, Xian Liu, Xiaoyan Hou, Weicui Chen, Sierra Hodges, Jian Kong, Bo Liu

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Journal of translational medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06277063 (Noninvasive Vagus Nerve Stimulation for the Prevention and Treatment of Primary Headache), which is not on this map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 9% 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.

NCT06277063 narecruitingnot on this mapstarted 2024, after this paper: background citation

Noninvasive Vagus Nerve Stimulation for the Prevention and Treatment of Primary Headache: a Single-arm Single-center Clinical Trial.

TypeinterventionalSponsorNanfang Hospital, Southern Medical UniversityRan2024 to 2026Enrolled15ConditionsPrimary Headache, Migraine in Adolescence, Migraine in Children, Cluster HeadacheArmsTranscutaneous auricular vagus nerve stimulation
3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 43 citations in OpenAlex.

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  6. A review of descending pain modulation in humans.Frontiers in pain research (Lausanne, Switzerland) · 2026
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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 2 institutions in 2 countries.

Jin Cao *Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.
Yue Zhang *Department of Radiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
Hui LiDepartment of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
Zhaoxian YanDepartment of Radiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
Xian LiuDepartment of Radiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
Xiaoyan HouDepartment of Radiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
Weicui ChenDepartment of Radiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
Sierra HodgesDepartment of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.
Jian KongDepartment of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA. jkong2@mgh.harvard.edu.ORCID 0000-0002-2744-6067
Bo LiuDepartment of Radiology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China. liubogzcm@163.com.
Guangzhou University of Chinese Medicine · CNHarvard University · US

Funding

Administration of Traditional Chinese Medicine of Guangdong Province of China 20182047Medical Scientific Research Foundation of Guangdong Province of China A2017234
6 · The paper itself

Abstract

backgroundA growing body of evidence suggests that transcutaneous auricular vagus nerve stimulation (taVNS) may relieve symptoms of migraineurs. Frequency is one of the key stimulation parameters. The aim of this study is to investigate the modulation effect of taVNS frequency on the descending pain modulation system (DPMS) in patients with migraine.

methodsTwenty-four episodic migraineurs without aura (21 females) were recruited for the single-blind, crossover, functional magnetic resonance imaging (fMRI) study. Each participant attended two separate fMRI scan sessions, one for 1 Hz and another for 20 Hz taVNS, in a random order. Seed-based functional connectivity analysis was applied using the ventrolateral periaqueductal gray (PAG) as the region of interest.

resultsCompared with the pre-taVNS resting state, continuous 1 Hz taVNS (during) produced a significant increase in functional connectivity between the PAG and the bilateral middle cingulate cortex (MCC), right precuneus, left middle frontal gyrus (MFG), and left cuneus. Compared with 20 Hz taVNS, 1 Hz taVNS produced greater PAG connectivity increases with the MCC, right precuneus/posterior cingulate cortex, left insula, and anterior cingulate cortex (ACC). A significant negative correlation was observed between the number of migraine attacks in the previous 4 weeks and the PAG-MCC functional connectivity in the pre-taVNS resting-state before 1 Hz taVNS.

conclusionsOur findings suggest that taVNS with different frequencies may produce different modulation effects on the descending pain modulation system, demonstrating the important role of stimulation frequency in taVNS treatment.

Indexed as

Migraine DisordersTranscutaneous Electric Nerve StimulationVagus Nerve StimulationFemaleHumansMagnetic Resonance ImagingPeriaqueductal GraySingle-Blind MethodDescending pain modulation networkFrequencyFunctional connectivityPeriaqueductal grayTranscutaneous auricular vagus nerve stimulation

Identifiers

PMID34404427
PMCPMC8371886
OpenAlexW3194964408

What OpenQuestion holds

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Registered trials

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.