Figure 2: EEG epoch is consistent with 1 Hz lateralized periodic sharp waves over the left occipital area (a). Prolonged EEG monitoring reveals continuous lateralized periodic discharges with superimposed spikes or rhythmic waves on some complexes (b). Spike mapping shows that area with maximum negativity is in the left occipital region (c). Electrographic seizure is characterized by rhythmic sharp waves and spikes in the left parietooccipital region, lasting about 11 s (d). EEG: Electroencephalography