Key result
Low-frequency auricular electro-acupuncture increases cutaneous microcirculatory flux and vasodilation more than high-frequency stimulation.
Why the study?
The autonomic nervous system plays a pivotal role in microcirculation regulation, and acupuncture can modulate blood flow with effects varying by stimulation site, frequency, and intensity.
Does low-frequency auricular stimulation with electro-acupuncture improve cutaneous microcirculation compared to high-frequency stimulation in healthy subjects?
Does low-frequency auricular stimulation with electro-acupuncture improve cutaneous microcirculation compared to high-frequency stimulation in healthy subjects?
Low-frequency auricular electro-acupuncture increases cutaneous microcirculatory flux in healthy subjects without affecting systemic hemodynamics.
Answers are grounded in this paper and cite their sources.
May enhance microcirculation safely in healthy subjects; hypothesis-generating and requires validation before clinical consideration.
Background: The regulation of microcirculation depends on the dynamic interaction of different factors: the autonomic nervous system plays a pivotal role in the blood flow and acupuncture can modulate it, obtaining different results depending on the site, the frequency, and the intensity of the stimulation. Methods: 18 healthy subjects have been enrolled and have undergone two sessions of electroacupuncture stimulations: one session using high frequency and one with low frequency. Microcirculation has been monitored continuously during stimulation using the laser Doppler method. Results: The microcirculatory parameters have shown a significant difference between high and low-frequency stimulation, suggesting that low-frequency stimulation is more effective for obtaining a vasodilator effect. Discussion: Our results show that low-frequency stimulation can increase the cutaneous microcirculatory flux, without significantly modifying blood pressure and heart rate. The auricular stimulation causes an increase in the activity of the vagus nerve, increasing the cholinergic activity without acting on post-junctional muscarinic receptors. Conclusion: Auricular acupuncture has a significant impact on the regulation of microcirculation.
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Gagliardi et al. (2023) studied Healthy subjects (n=18). Low-frequency auricular stimulation with electro-acupuncture vs. High-frequency auricular stimulation with electro-acupuncture was evaluated on Cutaneous microcirculation. Low-frequency auricular electro-acupuncture stimulation was more effective than high-frequency stimulation in increasing cutaneous microcirculatory flux and obtaining a vasodilator effect.
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