At the age of 19 years, MRI scans were unremarkable but EEG showed spikes over the occipital regions and ... polyspikes, sharp–waves and spike–waves (Figure 1D). Photic stimulation evoked ...

Repeated MRI T2-weighted images still showed hyperintensities in bilateral occipital lobes, only to a lesser degree (Figure 2). An EEG showed abnormal sharp wave complex arising from both ...