Does transcutaneous auricular vagus nerve stimulation help stroke motor function?
Transcutaneous auricular vagus nerve stimulation (taVNS) is a non-invasive treatment that stimulates the vagus nerve through the ear. It is being studied as a way to improve motor recovery after stroke. A 2025 meta-analysis of 10 randomized controlled trials found that taVNS significantly improves motor function in stroke patients 6. This answer explains what the research shows and what you should discuss with your doctor.
What the research says
A 2025 meta-analysis pooled data from 10 randomized controlled trials involving 512 stroke patients. It found that taVNS significantly increased motor function scores compared to control groups (standardized mean difference = 1.21; 95% CI: 0.88–1.55; p < 0.001) 6. This means taVNS produced a large improvement in motor outcomes.
Preclinical studies suggest taVNS may work by reducing inflammation, protecting the blood-brain barrier, and promoting neuroplasticity 10. Pilot clinical trials have also shown that taVNS paired with rehabilitation can improve upper limb motor and sensory function in chronic stroke patients 10.
Importantly, taVNS is non-invasive and can be applied to the ear, making it a safer and more accessible alternative to surgical vagus nerve stimulation 9. However, optimal stimulation parameters (site, intensity, frequency) are still being investigated 910.
What to ask your doctor
- Is taVNS an option for me as part of my stroke rehabilitation?
- How does taVNS compare with other therapies I am receiving?
- What are the potential side effects or risks of taVNS?
- How often and for how long would I need taVNS sessions?
- Are there any clinics or programs nearby that offer taVNS?
This question is drawn from common patient questions about Neurology and answered using cited medical research. We do not provide individualized advice.