  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.
