Hi T-Bone,
I too have weird sensations on my tongue (teeth, cheek, chin, etc) and vertigo, in fact it's what finally got me to the hospital and a diagnosis of AN. Now, my doctors theory is that my vertigo is caused by another condition called migraine related vertigo. Most of my nervey tingling/numbness happens when I'm getting, experiencing, or recovering from a vertigo attack. However, it only happens on the AN side. My own theory is that the vertigo probably is migraine related, and that the migraine "seeks out" the weakness caused by the AN resulting in atypical migraine symptoms. At least the headaches aren't painful anymore.
So far, I've tried a handful of migraine suppressing medications without any luck. I just filled a rx for Topamax, an anti-seizure medication that is supposed to be an effective migraine preventative. Maybe this will be the one that works.
By the way, when I was about 5 months post-radiation, I started having big-time balance issues in addition to the vertigo. I was considering having my AN side injected with genemycin to kill the vestibular nerve too. I was reluctant because I still have fairly decent hearing in my AN ear. Luckily I was referred to a physical therapist who introduced me to vestibular therapy. It took some time, but it worked. The unsteadiness hasn't totally gone, but it's manageable. I have a feeling riding a horse is good therapy too, and a lot more fun.
Keep talking with your doctors until you find something that works...as Phyl put it "individual results may vary"!
Betsy