The Study
Vagal Nerve Stimulation-Modulation of the Anti-Inflammatory Response and Clinical Outcome in Psoriatic Arthritis or Ankylosing Spondylitis
This study watched what happened when people used a special device on their neck for 5 days. It saw that some numbers changed, like heart rate and inflammation markers. But because no one got a fake version of the device to compare with, we don’t know if the device actually caused the changes or if they just happened by chance.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Scientists gave people with joint diseases a small handheld device that zaps the neck nerve to see if it can reduce swelling and pain.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 539 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1The inflammation markers changed, but the pain didn't always improve — meaning the body's chemistry shifted, but it didn't always feel better yet.
- 2In psoriatic arthritis: CRP dropped 20%, pain scores improved slightly, but TNF-alpha went up.
- 3In ankylosing spondylitis: three inflammatory proteins dropped, but pain didn't change.
- 4Heart rate slowed in both groups.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Mediators of Inflammation
Year
2021
Authors
C. Brock, S. E. Rasmussen, A. Drewes, H. Møller, B. Brock, B. Deleuran, A. Farmer, M. Pfeiffer-Jensen
Related Content
Claims (6)
Your vagus nerve is like a brake pedal for your body's stress response — when it's active, it calms down your immune system and reduces inflammation. If it's not working well, your body stays in high-alert mode and gets more inflamed.
For people with psoriatic arthritis who are feeling better, using a small device on the skin to stimulate a nerve in the neck for five days may help lower inflammation markers and improve how they feel, even if other common measures of arthritis don’t change.
A small device that sends gentle electrical pulses to a nerve in the neck for five days may change certain immune system chemicals in people with a type of arthritis called ankylosing spondylitis, but it didn’t seem to make their pain or swelling better.
A non-invasive device that stimulates a nerve in the neck for five days was linked to a noticeable drop in heart rate in people with two types of inflammatory arthritis, which might mean the body’s natural calming system was activated.
A non-invasive device that stimulates a nerve in the neck made heart rate control improve in people with one type of arthritis but worsen in people with another type, after just five days of use.
In people with psoriatic arthritis, a mild electric stimulation on the neck seemed to make one harmful immune protein go up, even though other signs of inflammation got better — which is weird and suggests the body’s immune system is responding in a complicated way.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.