Typical febrile seizures are characterized by all of the following except.

Febrile convulsions are the commonest cause of seizures during early childhood.   These convulsions are not related to degree of temperature but frequent if temperature rises abruptly. The Febrile convulsion   Simple or benign   Complex or atypical   Characteristics of simple benign febrile convulsion The fits occur within 24 hours of onset of fever last less than 10 minutes   Convulsions are generalized (mostly not always) No postictal neurological deficit   EEG (electroencephalogram) is normal after few days of seizure   The age of onset usually between 6 months and 5 years. Atypical febrile seizures:   Characterised by presence of family history of epilepsy. Neurodevelopment retardation   Convulsion due to organic neurological damage are precipitated by fever, as the cerebral threshold for seizures is reduced with elevation of temperature