epilepsy with grand mal seizures on awakening
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ep·i·lep·sy with grand mal sei·zures on a·wa·ken·ing
generalized epilepsy syndrome characterized by onset in the second decade of life, typically with generalized tonic-clonic seizures, of which most occur shortly after awakening (regardless of the time of day) and are exacerbated by sleep deprivation. There is a genetic predisposition and EEG shows one of several generalized patterns of interictal discharges; photosensitivity is common.