MULTICHANNEL MAGNETOENCEPHALOGRAPHY FOR LOCALIZATION OF EPILEPTOGENICACTIVITY IN INTRACTABLE EPILEPSIES

Patients with medically intractable epilepsy were studied with interic tal multichannel magnetoencephalography, MEG, and with intracranial;el ectroencephalographic, EEG, recordings of their seizures. It was found that strong interictal, epileptogenic, biomagnetic signals originated in small areas within the much larger areas found to include the site where epileptic seizures, according to intracranial EEG recordings, a ppear to start. Thus,the interictal biomagnetic signals may imply a mo re precise localization of epileptic activity acting as pacemaker for seizures.