Subtypes of temporal lobe epilepsies: a clinical point of view.
We studied 40 patients with temporal lobe epilepsies who had long-term intracranial EEG recordings and temporal lobectomies. They were divided into 3 groups on the basis of the anatomical site of seizure origin. An electrode implantation technique combined intracerebral depth electrodes with subdural strip electrodes. The seizures were of amygdalo-hippocampal origin in 18 patients, lateral temporal in 13 patients, and temporo-basal in 9 patients. The clinical and EEG features were reviewed retrospectively with regard to 3 factors in each patient: localization of interictal spikes in the scalp-recorded EEG, signal symptoms (auras), and presumed etiologies. Epilepsy with amygdalo-hippocampal and lateral temporal seizures was found to be distinguishable by the electroclinical features. It seems practical to classify these 2 subtypes of temporal lobe epilepsies as in the 1989 Classification of Epilepsies and Epileptic Syndromes. Temporal lobe epilepsies thus defined can be regarded as epileptic syndromes rather than a cluster of seizure manifestations.
Mihara
T
T
National Epilepsy Center, Shizuoka Higashi Hospital, Japan.
Tottori
T
T
Hiyoshi
T
T
Matsuda
K
K
Watanabe
Y
Y
Yagi
K
K
Seino
M
M
D000293:Adolescent; D000328:Adult; D000679:Amygdala / Q000503:physiopathology; D001931:Brain Mapping; D004569:Electroencephalography; D004833:Epilepsy, Temporal Lobe / Q000145:classification* / Q000503:physiopathology / Q000601:surgery; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006624:Hippocampus / Q000503:physiopathology; D006801:Humans; D008297:Male; D009434:Neural Pathways / Q000503:physiopathology; D011612:Psychosurgery; D013702:Temporal Lobe / Q000503:physiopathology / Q000601:surgery