Ratnapriya et al. (2010) reported a 4-generation family from southern India in which 6 living members had juvenile myoclonic epilepsy. Age at onset ranged from 12 to 20 years, and all had myoclonic seizures with secondary generalized tonic-clonic ... Ratnapriya et al. (2010) reported a 4-generation family from southern India in which 6 living members had juvenile myoclonic epilepsy. Age at onset ranged from 12 to 20 years, and all had myoclonic seizures with secondary generalized tonic-clonic seizures. Two patients had a history of febrile seizures, and 2 had absence seizures. EEG showed generalized 4-6 Hz polyspike and wave discharges characteristic of a generalized epilepsy. Features included repetitive myoclonic seizures involving upper extremities, often after awakening, and at least 1 patient reported that seizures were precipitated by alcohol, sleep deprivation, and flashing lights. Three patients exhibited a photoparoxysmal response. Two clinically unaffected individuals had an abnormal EEG.