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Spontaneous myoclonic absence

Rhythmic spike waves at 3-Hz. Rhythmic myoclonias begin 1 second after the onset of EEG paroxysmal discharges and are progressively associated with a tonic contraction. (Used with permission from: Tassinari CA, Michelucci R. Epilepsy with myoclonic absences: a reappraisal. In: Wolf P, editor. Epilepsic seizures and syndromes. London: John Libbey, 1994:137-41.)