Characterizing Acupuncture Stimuli Using Brain Imaging with fMRI - A Systematic Review and Meta-Analysis of the Literature
Huang, W., Pach, D., Napadow, V., Park, K., Long, X., Neumann, J., Maeda, Y., Nierhaus, T., Liang, F., & Witt, C. M. · PLOS One · 2012 April 9
DOI 10.1371/journal.pone.0032960
Objective
Our aim was to provide a systematic overview of acupuncture fMRI research considering the following aspects: 1) differences between verum and sham acupuncture, 2) differences due to various methods of acupuncture manipulation, 3) differences between patients and healthy volunteers, 4) differences between different acupuncture points.
Conclusions
Brain response to acupuncture stimuli encompasses a broad network of regions consistent with not just somatosensory, but also affective and cognitive processing. While the results were heterogeneous, from a descriptive perspective most studies suggest that acupuncture can modulate the activity within specific brain areas, and the evidence based on meta-analyses confirmed some of these results. More high quality studies with more transparent methodology are needed to improve the consistency amongst different studies.
Critical Appraisal
Published research can offer valuable insights, but a paper’s conclusions may go beyond what its results support. Critical appraisal examines the methods, findings and limitations to clarify what can reasonably be concluded—and what remains uncertain.
This article has not yet been critically appraised by the Research Hub.
Learn more about Critical Appraisal
Insights
Most studies suggest that acupuncture can modulate the activity within specific brain areas, and the evidence based on meta-analyses confirmed some of these results.
Brain response to acupuncture stimuli encompasses a broad network of regions consistent with not just somatosensory, but also affective and cognitive processing. While published results on acupuncture and fMRI were heterogeneous, from a descriptive perspective most studies suggest that acupuncture can modulate the brain activity within specific brain areas, and the evidence based on meta-analyses confirmed part of these results. Future studies should further improve methodological aspects and reporting related to both fMRI and acupuncture, and strictly control experimental conditions for more robust inference. Specifically, direct contrast analyses should be used to contrast different stimulus conditions (e.g. verum versus sham acupuncture) when evaluating research questions concerning acupuncture specificity.
