there is an auditory therapy (sound) that helps the brain to reboot' or work-around, damaged nerves, if the damage is in the brain. i don't know if the damage is in the muscles and nerves of your face or not, but you might inquire of your doctor.

if brain neural connections are affected, you might look into a technology called Holosync (you can get it as a therapy at CenterPointe.com). my doc called it "Alpha/Theta" therapy, and disparaged it, but it "cured" my brain of many disorders.

i know that many stroke victims recover if they persist in brain stimulating activities... so don't give up hope~!

best wishes~
Gus