This EEG is from an 8-year-old boy with early morning seizures consisting of unilateral facial twitching, drooling, and dysarthria. The EEG during sleep shows bilateral centrotemporal sharp waves (most prominent on the left) suggestive of benign childhood epilepsy with centrotemporal spikes (15 microvolts/mm, 30 mm/sec). These “rolandic” spikes most commonly show a dipole on referential montage, with frontal positivity and temporal negativity.
