Typically, this type of seizure lasts between 10 and 30 seconds. The person, most often a child aged 5 to 15, abruptly stops whatever he's doing (talking, walking) and appears to "stare into space." Absence seizures rarely cause a true convulsion in which the person falls down or collapses. About a quarter of people who have absence seizures will develop another type of generalized seizure called tonic-clonic seizures (formerly called ''grand mal'' seizures). The vast majority of children, however, will outgrow them
Absence seizures rarely cause a true convulsion in which the person falls down or collapses. While many people presenting with seizures do so with a prior history of events, between onethird and half present with a single unprovoked seizure6,11. Most studies combine the incidence rates for all newly diagnosed unprovoked seizures.