My oma had front lobe aphasia which determines similar to dementia until they basically become infantile and then die trapped inside their bodies, fucking awful. I'll never forget when I was 18 she got me a birthday card, at a Christmas party (my bday is nowhere close to christmas) and it has a unicorn and rainbows on it - it was for a small child, along with a very random gift. Crazy enough it was my nieces birthday recently and someone got her the same card 16 years after the incident and I was instantly transported back in time. I wish more than anything we had a cure for it, I can't imagine anything being worse than losing my mind and being trapped in my body.