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Epilepsy with grand mal seizures on awakening

generalised epilepsy syndrome characterised by onset in the second decade of life, typically with generalised 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 generalised patterns of interictal discharges; photosensitivity is common.