Can you actually improve hand spasticity with exercise? MusicGlove by Flint Rehab

This might help some people but for me I have zero ability to extend my fingers. Although I suppose I could do action observation of the little video in there and watch it for hours at a time. An excellent research project for a grad student. How to get to the point to be able to use the Music Glove?  Is action observation better than mirror therapy for hand recovery? And how much sensation therapy is needed per Margaret Yekutiel?  WHOM will do the research to find that out?

Can you actually improve hand spasticity with exercise? MusicGlove by Flint Rehab