Figure 4: A seizure recorded using subdural electrodes. The top 24 channels are from the gird and subtemporal electrodes on the right. The lower 24 channels are from the left side. The lowest six channels are from the left subtemporal contacts. EEG demonstrates high-amplitude ictal discharges over the left anterior contacts of the middle subtemporal electrode (hippocampus) followed by high-frequency discharges over all eight contacts of the two subtemporal and the two contacts of the most anterior subtemporal electrode (amygdala) (HFF = 70, LFF = 1, and sensitivity = 150 μV/mm).