REVIEW
Dystonia
Vibro-tactile stimulation as a non-invasive neuromodulation method to treat motor symptoms in focal dystonia: A systematic review
1. University of Minnesota Twin Cities, St. Paul, United States
2. Gazi Universitesi, Ankara, Türkiye
3. Glasgow Caledonian University, Glasgow, United Kingdom
Select one of your emails
You have multiple emails registered with Frontiers:
Notify me on publication
Please enter your email address:
If you already have an account, please login
You don't have a Frontiers account ? You can register here
Abstract
Background: Superficial vibrotactile stimulation (VTS) is a non-invasive form of neuromodulation targeting tactile and proprioceptive mechanoreceptors known to influence reflexive and voluntary motor behavior and conscious proprioception. Objectives: Systematically review empirical evidence on the behavioral, biomechanical and neurophysiological effects of VTS in focal dystonia and evaluate its suitability and potential as a clinical intervention in patients with focal dystonia. Methods: PUBMED, MEDLINE, CINAHL, and Cochrane Library databases were searched up to September 6, 2025. Included were studies that investigated underlying neurophysiological mechanisms of VTS and the behavioral effects in patients with dystonia. A total of 24 eligible studies were reviewed. Results: The review of empirical data indicated that VTS of dystonic regions is typically fast acting and can lead to symptoms reduction within minutes. Results show than VTS can 1) induce head righting and reduce pain in cervical dystonia, 2) improve voice quality and reduce speech effort in laryngeal dystonia, 3) normalize muscle activation in upper limb and cervical dystonia. Based on objective behavioral and biomechanical measures as well as subjective effect ratings by patients, between 57-85% of participants responded to VTS by reducing the frequency and magnitude of symptoms. Temporal post-treatment VTS effects varied widely, with short applications (4 s -15 min) decaying within minutes and longer applications (20-45 min) showing effects for hours or days. Major observable electrophysiological responses to VTS included 1) a reduction in EMG activity of vibrated muscle and its synergists, and increased activity of antagonistic muscles, 2) reduction of excessive neuronal synchronization over somatosensory-motor cortex, 3) and altered motor-evoked potentials of vibrated muscles, their synergists and antagonists. Conclusions: The reviewed empirical evidence indicates that VTS can reduce unwanted muscle spasms in various forms of focal dystonia. At present, there is no knowledge of optimal daily or weekly dosage. Initial evidence indicates that at-home application of VTS over months is feasible, but there is only inconclusive evidence about the long-term effects of VTS on FD symptoms and what differentiates responders from non-responders to VTS.
Summary
Keywords
Dystonia, intervention, sensorimotor, somatosensory, stimulation training
Received
03 October 2025
Accepted
09 March 2026
Copyright
© 2026 Konczak, Ozkul, Rooney and Amini. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Juergen Konczak
Disclaimer
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.