Using Micro-filaments to Detect "fast Ripples" and Improve the Identification of the Epileptogenic Zone

Who May Qualify: - inclusion criteria is determined based on the clinical diagnosis of the refractory epilepsy and the admissibility of the patient for the stereoelectroencephalography (sEEG) procedure Who Should NOT Join This Trial: - 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. Always talk to your doctor about whether this trial is right for you.