Vagus Nerve Stimulation Research Papers & Citations
These are the research papers we come back to most often: on the vagus nerve’s control of inflammation, and on using low-intensity focused ultrasound to reach it without surgery. Each one has a short, plain-language note on what it found and what kind of study it was. Results in rats and mice don’t always carry over to people, so every note says which it was.
The inflammatory reflex: how the vagus nerve calms inflammation
The idea that ties this whole library together: signals carried by the vagus nerve can turn inflammation down.
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The vagus nerve and the inflammatory reflex: linking immunity and metabolism
Explains the “inflammatory reflex,” in which the vagus nerve holds back the body’s inflammatory response, and how the same nerve helps regulate metabolism. It reviews mostly early and animal evidence that this pathway could one day help with the inflammation behind obesity, insulin resistance, and type 2 diabetes.
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Vagus nerve through α7 nAChR modulates lung infection and inflammation: models, cells, and signals
Gathers animal and cell research showing that vagus signals, acting through the α7 nicotinic receptor on immune and lung cells, can calm lung inflammation in models of acute lung injury. The authors propose a lung-specific version of the inflammatory reflex; that part is still a hypothesis.
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Vagus nerve stimulation inhibits cytokine production and attenuates disease severity in rheumatoid arthritis
In people with implanted vagus nerve stimulators, blood taken after stimulation made less TNF and other inflammatory messengers. In 17 people with rheumatoid arthritis, stimulation lowered TNF production for up to 84 days and improved disease-activity scores. This line of work led to the FDA approving an implanted vagus nerve stimulator for rheumatoid arthritis on July 30, 2025.
Ultrasound and the inflammatory reflex
Can focused ultrasound, from outside the body, switch on the same anti-inflammatory pathway? So far these are animal studies.
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Noninvasive ultrasound stimulation of the spleen to treat inflammatory arthritis
Daily ultrasound aimed at the spleen from outside the body reduced joint swelling and arthritis scores in mice, but only at certain settings. Experiments in immune-deficient mice suggested both T cells and B cells are needed for the effect.
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Noninvasive sub-organ ultrasound stimulation for targeted neuromodulation
In rats and mice given a bacterial toxin, ultrasound aimed at the spleen reduced the inflammatory TNF response about as well as an implanted vagus nerve stimulator, and the effect depended on specific immune cells and the α7 receptor. Ultrasound aimed at precise spots in the liver blunted the toxin’s rise in blood sugar.
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Modulating the inflammatory reflex in rats using low-intensity focused ultrasound stimulation of the vagus nerve
In rats with toxin-triggered inflammation, a single 5-minute session of focused ultrasound on the vagus nerve lowered blood TNF by about 19%, similar to electrical stimulation (16%). Three sessions lowered it by 73% compared with untreated rats, with no nerve damage seen.
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Pulsed ultrasound attenuates the hyperglycemic exacerbation of myocardial ischemia–reperfusion injury
Mice with high blood sugar had about one-third the heart-muscle damage from an induced heart attack if they first got 20 seconds of pulsed ultrasound over the spleen or neck. The benefit disappeared without the α7 receptor or with a cut vagus nerve, which points to the vagus-driven anti-inflammatory pathway.
How low-intensity ultrasound acts on cells and nerves
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Low-intensity ultrasound-induced anti-inflammatory effects are mediated by several new mechanisms including gene induction, immunosuppressor cell promotion, and enhancement of exosome biogenesis and docking
By mining earlier datasets, the authors linked low-intensity ultrasound to more activity in anti-inflammatory genes, in immune cells that damp inflammation, and in the tiny packets (exosomes) cells use to signal each other. These are proposed mechanisms that still need testing in the lab and in animals.
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Therapeutic low-intensity ultrasound for peripheral nerve regeneration: a Schwann cell perspective
Gentle ultrasound has helped injured peripheral nerves regrow in rodents, but human trials are still few and small. The review focuses on Schwann cells, which switch into a “repair mode” after injury, and suggests how ultrasound might keep that mode going long enough for full regrowth.
Precision targeting: focusing ultrasound on nerves and the brain
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Neuromodulation with transcranial focused ultrasound
Focused ultrasound can pass through the skull and act on small, even deep, brain regions without surgery, something other methods struggle to do. The review covers current and emerging uses, how ultrasound changes nerve-cell activity, and why stimulation settings matter. It is about the brain, not the vagus nerve.
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Pressure measurement of geometrically curved ultrasound transducer array for spatially specific stimulation of the vagus nerve
The team built a tiny curved ultrasound array meant to wrap around the vagus nerve and measured, in water, that it focuses sound to a spot of about 110 × 550 micrometers, around 2% of the nerve’s cross-section. That precision might one day allow targeting individual fiber bundles; nerve stimulation itself was not tested.
More Research and Discussion
For more research papers and ongoing discussions, visit our Reddit community:
https://www.reddit.com/r/UNOMOD/New to all of this? Start with Ultrasound Vagus Nerve Stimulation or Getting Started.
