Surgery robots have a tongue controller. It takes a while to train on that, but when you‘re trained your tongue muscle is the most precise way to control, say, subtle incisions deep inside the brain.
If anybody reading this wants to hire someone to devote their life to this tech, hit me up. Autistic special interest.
Flag my comment, it‘s wrong.
And maybe you didn't miss a joke, maybe your doctor had tongue-driven brain surgery? :P