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Janz Syndrome:

A disorder characterized by the onset of myoclonus in adolescence, a marked increase in the incidence of absence seizures (see EPILEPSY, ABSENCE), and generalized major motor seizures (see EPILEPSY, TONIC-CLONIC). The myoclonic episodes tend to occur shortly after awakening. Seizures tend to be aggravated by sleep deprivation and alcohol consumption. Hereditary and sporadic forms have been identified. (From Adams et al., Principles of Neurology, 6th ed, p323)

Synonym: adolescent myoclonic epilepsy, myoclonic, juvenile epilepsy, juvenile myoclonic epilepsy of janz, juvenile myoclonic epilepsy, jmes (juvenile myoclonic epilepsy), jme (juvenile myoclonic epilepsy), janz juvenile myoclonic epilepsy, janz impulsive petit mal, impulsive petit mal epilepsy, impulsive, janz petit mal.