Fig. 1.

Intracranial EEG and MRI-CT coregistered electrodes. A: the intracranial recording, i.e., local field potentials (LFP), from an 8 contact depth electrode implanted along the long axis of the hippocampus via a posterior approach. The anterior most contact 1 targeting the anterior hippocampus and contact 2 show interictal epileptiform spikes. In this patient contacts 1–4 span the length of the hippocampus. B: the seizure onset zone (SOZ) was determined by recording spontaneous seizures and contacts outside the SOZ are denoted as non-SOZ (nSOZ). The contacts that bridge the SOZ and non-SOZ (here 3 and 2) are labeled as bridge pairs.