[Diagnosis of sylvian and perisylvian epilepsies. Excitation symptomes of the insula reilii].

The insula is a hidden part in the cerebral cortex about which relatively little neurological research has been done. The present manuscript describes architectural and evolutionary aspects of the insula reilii as well as its function, towards a better understanding of seizure semiology. As the literature of such casuistry is poor, some own cases are presented. Seizure semiology, imaging, magnetoencephalographic reports, resective epilepsy surgery, radiosurgical treatments, and thermolesions are described. Magnetic source imaging as noninvasive treatment can deliver important information for the involvement of sylvian and perisylvian regions in focal pharmacoresistant epilepsies.