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Marked myoclonic jerks in juvenile myoclonic epilepsy (video EEG)

Note the asymmetrical onset of the discharges and that the myoclonic jerks occur during the polyspike phase of the EEG discharge. (Courtesy of C P Panayiotopoulos. From: Panayiotopoulos CP. A Clinical Guide to Epileptic Syndromes and Their Treatment. Revised 2nd ed. London: Springer, 2010.)