Gosh, this seems a good place for a complementary medical approach. Just as a trial maybe you could locate someone with cranial sacral body work training as in a Rolfer or Chiropractor. I have had fantastic results from both. The other thing that seems like it might help is taking the enzyme, serrapeptase. I used Serraflazyme which is a brand name. It dissolves scar tissue that locks up muscles. The atrophy in my forehead was fixed by that. Now I have equal muscles on the untouched side and the surgery side. I also had PComm clipping. My 4th ventricle was not draining well and that seems to have been alleviated by my Rolfer. While these things cost and aren't covered by insurance, they also aren't invasive.