The first chapter from The Brain That Changes Itself is about a woman who couldn't walk because of some bacteria (iirc?) that attacked something in her inner ea

The first chapter from The Brain That Changes Itself is about a woman who couldn't walk because of some bacteria (iirc?) that attacked something in her inner ear that wound up destroying her balance. The chapter is a story about attaching electrodes to her tongue connected to a helmet with accelerometers that helped restore her sense of balance. Initially the effect persisted for a short time after removing the helmet and electrodes. With subsequent sessions the duration got longer and longer and after several years her balance was completely normal again.