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Monitoring Acupuncture Effects on Human Brain by fMRI
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Acupuncture and endorphins.

Ji-Sheng Han1

  • 1Neuroscience Research Institute, Peking University and Key Laboratory of Neuroscience (Peking University), Ministry of Education, 38 Xue-Yuan Road, Beijing 100083, PR China. hanjisheng@bjmu.edu.cn

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Summary
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Electroacupuncture (EA) modulates pain by releasing specific opioid peptides. Combining 2 Hz and 100 Hz frequencies maximizes pain relief for chronic pain conditions.

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Area of Science:

  • Neuroscience
  • Pain Management
  • Complementary and Alternative Medicine

Background:

  • Acupuncture and electroacupuncture (EA) are recognized worldwide for pain treatment.
  • Endogenous opioid peptides in the central nervous system are key mediators of EA's analgesic effects.

Purpose of the Study:

  • To investigate the differential release of neuropeptides by EA at various frequencies.
  • To determine the optimal EA frequency combination for maximal analgesic effect.

Main Methods:

  • Administration of EA at 2 Hz, 100 Hz, and a combination of both frequencies.
  • Measurement of endogenous opioid peptide release (enkephalin, beta-endorphin, endomorphin, dynorphin).
  • Clinical verification in patients with chronic pain conditions.

Main Results:

  • EA at 2 Hz accelerates the release of enkephalin, beta-endorphin, and endomorphin.
  • EA at 100 Hz selectively increases dynorphin release.
  • A combination of 2 Hz and 100 Hz EA simultaneously releases all four opioid peptides, enhancing therapeutic effects.

Conclusions:

  • Different EA frequencies differentially modulate endogenous opioid peptide release.
  • Combining 2 Hz and 100 Hz EA provides a synergistic analgesic effect, maximizing therapeutic benefits.
  • This frequency-dependent mechanism is clinically relevant for managing chronic pain, including low back pain and diabetic neuropathic pain.