S.H.
I baby-sat a baby like that once.
It was called petit-mal seizures.
Here is a link about it:
http://www.nlm.nih.gov/medlineplus/ency/article/000696.htm
But, her Doc told the parents she'll grow out of it.
I don't know the full details of her diagnosis though.
try not to worry. Its good you are taking her to the Doctor and have the inclination to have it investigated.
TAKE CARE and all the best,
Susan