Wearable vibrotactile stimulation for upper extremity rehabilitation in chronic stroke: clinical feasibility trial using the VTS Glove

TL;DR

This study investigates the feasibility of using a wearable vibrotactile device, the VTS Glove, for upper limb rehabilitation in chronic stroke survivors, showing promising improvements in tactile perception, spasticity, and range of motion.

Contribution

It introduces a wearable vibrotactile stimulation device for home-based stroke rehabilitation and evaluates its clinical feasibility and preliminary effects.

Findings

Improved tactile perception as measured by Semmes-Weinstein exam.

Reduction in spasticity indicated by Modified Ashworth measures.

Increased voluntary finger, elbow, and shoulder movement.

Abstract

Objective: Evaluate the feasibility and potential impacts on hand function using a wearable stimulation device (the VTS Glove) which provides mechanical, vibratory input to the affected limb of chronic stroke survivors. Methods: A double-blind, randomized, controlled feasibility study including sixteen chronic stroke survivors (mean age: 54; 1-13 years post-stroke) with diminished movement and tactile perception in their affected hand. Participants were given a wearable device to take home and asked to wear it for three hours daily over eight weeks. The device intervention was either (1) the VTS Glove, which provided vibrotactile stimulation to the hand, or (2) an identical glove with vibration disabled. Participants were equally randomly assigned to each condition. Hand and arm function were measured weekly at home and in local physical therapy clinics. Results: Participants using the VTS Glove showed significantly improved Semmes-Weinstein monofilament exam, reduction in Modified Ashworth measures in the fingers, and some increased voluntary finger flexion, elbow and shoulder range of motion. Conclusions: Vibrotactile stimulation applied to the disabled limb may impact tactile perception, tone and spasticity, and voluntary range of motion. Wearable devices allow extended application and study of stimulation methods outside of a clinical setting.