Anterior Callosotomy in Frontal Lobe Epilepsies
The investigation of frontal lobe epilepsies for the determination of surgical treatment gives rise to particular difficulties. Even depth electrode studies of spontaneous seizures, complemented by electrical stimulation, sometimes do not succeed in lateralizing the epileptogenic focus. In the stereotactic EEG (SEEG) laboratory of Hôpital Notre-Dame (Saint-Hilaire et al., 1976; Bouvier et al., 1976) we have studied 17 patients with frontal lobe epilepsy. In ten patients we could demonstrate from spontaneous seizures which frontal lobe was involved first by the epileptogenic discharge. In four patients the spontaneous seizures started simultaneously in both frontal lobes. Only electrical stimulation, by reproducing the spontaneous seizure, could lateralize and localize the epileptic focus to one frontal lobe. Finally, in the three remaining patients neither the spontaneous seizures nor electrical stimulation could direct us to one particular frontal lobe. We concluded tentatively that these seizures were either bifrontal at the onset or unifrontal epilepsies with very rapid diffusion to the contralateral frontal lobe.
KeywordsCorpus Callosum Frontal Lobe Myoclonic Jerk Epileptic Focus Spontaneous Seizure
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