This year roughly 125,000 americans--half of them children and adolescents--will be overcome by a sudden, abnormal discharge of electrical currents in the brain marking their first seizure. A seizure can be pretty scary, especially when the person starts twitching uncontrollably or, in rare cases, stops breathing altogether. Seizures in children under age 5, however, are usually the result of high fevers--typically 103[degrees]F or higher--and most kids grow out of them.
But 25,000 to 45,000 U.S. children each year have a first seizure that is nonfebrile (not brought on by a fever), and they stand a significant chance of having epilepsy,...