Unverricht-Lundborg disease (ictal EEG)

Frequent spontaneous jerks are seen following generalized bursts of spikes (red arrows), but these can also occur without EEG changes (black arrow). A generalized burst of polyspikes (blue arrow) during 0.5 Hz intermittent photic stimulation is elicited by eye closure rather than the flash. (Courtesy of Dr Stewart G. Boyd, Great Ormond St. Hospital for Children, London.)