Really interesting stuff. I'd write out a problem list and work on each element as a starting point. What can you do for her feet. What bracing or support devices might be appropriate. Might a tilt table or standing frame be of use?

It is a neurological disorder and it's not going away so let's look for support and not cure. Time to be creative. Hopefully we'll get a few comments from Neuro PT's with good experience with F.A. patients.