It sounds like this might be what they think it is http://www.nlm.nih.gov/medlineplus/e...cle/001397.htm

Acute cerebellar ataxia in children, especially those younger than age 3, may occur several weeks after an illness caused by a virus.
Cerebellar ataxia caused by a recent viral infection may not need treatment.
People whose condition was caused by a recent viral infection should make a full recovery without treatment in a few months.