Figure 5.

The MRI of patient 6 showed two heterotopic nodules located in the right trigonal area. Two contacts are inside these nodules (RAN1, RPN1). Ictal and interictal discharges were seen on the scalp over the right temporal lobe and the patient was implanted in the right hippocampus (RHC) and Amygdala (RA). Contacts RA1 and RHC1 were in the SOZ. This figure shows two selections (gray) of the unfiltered EEG. The first demonstrates a fast ripple outside spikes in a nonspiking channel (RPN1). This channel showed only fast ripples and no other epileptiform activity and none of the patient’s seizure was generated in this lesion. The second selection shows a fast ripple inside SOZ but outside a spike. It is important to notice that most of the HFOs in neocortical areas and outside spikes were shorter and of lower amplitude than those within spikes. This is visible when comparing with the HFOs in Fig. 1 inside the mesial temporal lobe or with the ones in Figs. 3 and 4 cooccurring with spikes.

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