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Myoclonic jerks in myoclonic epilepsy in infancy (video EEG)

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Clinically, the first symptom was a sudden jerk of the head and shoulders backwards. This coincided with a giant (approximately 1 mV) spike or multispike-slow-wave followed by rhythmic slow activity at around 3 to 5 Hz, together with some random spikes and slow-waves. The whole discharge lasted for approximately 5 to 7 s. (Courtesy of C P Panayiotopoulos. From: Panayiotopoulos CP. A Clinical Guide to Epileptic Syndromes and Their Treatment. Revised 2nd ed. London: Springer, 2010.)