A review by Zhang et al., published 21 April 2026 in Frontiers in Neuroscience (Gut–Brain Axis), summarizes clinical evidence that several neuromodulation techniques can reduce abdominal pain and improve bowel function in patients with irritable bowel syndrome (IBS). The authors report trials of electroacupuncture (EA), sacral nerve stimulation (SNS), transcutaneous auricular vagus nerve stimulation (taVNS, a noninvasive method that targets the ear branch of the vagus nerve) and transcutaneous electrical nerve stimulation (TENS) showing symptom improvement and quality-of-life gains.

The review frames these approaches as ways to modulate central or peripheral components of the brain–gut axis. According to the authors, neuromodulation may alter gut motility and suppress inflammatory responses that contribute to visceral hypersensitivity in IBS. The article describes clinical trials supporting short-term benefits on pain and bowel symptoms, but does not report unified effect sizes across studies.

Zhang et al. highlight two persistent limits in the literature. First, individual responses vary substantially across patients. Second, long-term efficacy is insufficiently documented: the review notes a shortage of durable follow-up data and standardised protocols across studies. The authors call for personalized treatment plans, exploration of combination therapies, and technological improvements to better target relevant neural pathways.

The paper is open-access under CC BY. It was received 21 January 2026 and accepted 21 April 2026. The review summarizes existing clinical trials rather than reporting new patient data, and it flags gaps that researchers and device developers should address before wider clinical adoption.

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Tags: Irritable bowel syndrome, neuromodulation, transcutaneous auricular vagus nerve stimulation, sacral nerve stimulation, electroacupuncture

Topics: Neuromodulation, Vagus nerve & taVNS, Non-invasive brain stimulation