AcuTrials

Brain functional connectivity network studies of acupuncture: a systematic review on resting-state fMRI

Item

Title

Brain functional connectivity network studies of acupuncture: a systematic review on resting-state fMRI

Journal Publication

Journal of Integrative Medicine

Date

2018

volume

16(1)

pages

26-33

Research Type

Systematic Review

Keywords

Alternative medicine
Complementary medicine
Functional connectivity
Functional network
Resting-state functional magnetic resonance

Abstract

BACKGROUND: Functional magnetic resonance imaging (fMRI) is a novel method for studying the changes of brain networks due to acupuncture treatment. In recent years, more and more studies have focused on the brain functional connectivity network of acupuncture stimulation. OBJECTIVE: To offer an overview of the different influences of acupuncture on the brain functional connectivity network from studies using resting-state fMRI. SEARCH STRATEGY: The authors performed a systematic search according to PRISMA guidelines. The database PubMed was searched from January 1, 2006 to December 31, 2016 with restriction to human studies in English language. INCLUSION CRITERIA: Electronic searches were conducted in PubMed using the keywords "acupuncture" and "neuroimaging" or "resting-state fMRI" or "functional connectivity". DATA EXTRACTION AND ANALYSIS: Selection of included articles, data extraction and methodological quality assessments were respectively conducted by two review authors. RESULTS: Forty-four resting-state fMRI studies were included in this systematic review according to inclusion criteria. Thirteen studies applied manual acupuncture vs. sham, four studies applied electro-acupuncture vs. sham, two studies also compared transcutaneous electrical acupoint stimulation vs. sham, and nine applied sham acupoint as control. Nineteen studies with a total number of 574 healthy subjects selected to perform fMRI only considered healthy adult volunteers. The brain functional connectivity of the patients had varying degrees of change. Compared with sham acupuncture, verum acupuncture could increase default mode network and sensorimotor network connectivity with pain-, affective- and memory-related brain areas. It has significantly greater connectivity of genuine acupuncture between the periaqueductal gray, anterior cingulate cortex, left posterior cingulate cortex, right anterior insula, limbic/paralimbic and precuneus compared with sham acupuncture. Some research had also shown that acupuncture could adjust the limbic-paralimbic-neocortical network, brainstem, cerebellum, subcortical and hippocampus brain areas. CONCLUSION: It can be presumed that the functional connectivity network is closely related to the mechanism of acupuncture, and central integration plays a critical role in the acupuncture mechanism.

doi

10.1016/j.joim.2017.12.002

pmid

PMID:29397089

Language

English

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