•• Absence Seizures •• Absence seizures, sometimes referred to as “petit mal” seizures, are another common type of seizure experienced by children with CLN1. According to our survey data, 57% of the CLN1 population has them. Absence seizures are generalized seizures, meaning they affect both sides of the brain at the same time. They cause brief, sudden lapses in awareness, often with episodes of staring blankly. Because of this presentation, absence seizures are often mistaken as a child daydrea