He awakens with severe dizziness, nausea and imbalance. He can not walk and crawls to the bathroom and falls when he stands up.
Exam shows broad-based ataxic gait and horizontal and rotatory nystagmus.
Post-accident, he has headache and neck pain, which resolves in 5 days. This resolves completely, but recurs 2 nights later. C.60 year-old white female develops sudden episode of vertigo and ringing in her ears. She also notes decreased hearing in both ears. This persists for 2 days and resolves.