Recording "Fast Ripples" Using Microelectrodes During Stereo-encephalography in Patients With Drug-resistant Partial Epilepsy

Inclusion Criteria: * Patient with RPE in whom SEEG is required to precisely localize the seizure focus Exclusion Criteria: Patients with SEEG contra-indication: * severe psychiatric disorders, * severe agitation during their crisis * contraindication for performing an MRI: claustrophobia, a cardiac or neural stimulator, ferromagnetic surgical clips, cochlear implants, intraocular metallic foreign body or in the nervous system, * contraindication to intracerebral investigation (macro-electrodes): ongoing infection, severe associated pathology (cardiac, pulmonary, renal, hepatic), pregnant or nursing women, * anti thrombotic ongoing treatment.