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Subtypes of Temporal Lobe Epilepsies: A Clinical Point of View
Author(s) -
Mihara Tadahiro,
Tottori Takayasu,
Hiyoshi Toshio,
Matsuda Kazumi,
Watanabe Yutaka,
Yagi Kazuichi,
Seino Masakazu
Publication year - 1990
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1111/j.1440-1819.1990.tb01416.x
Subject(s) - temporal lobe , ictal , epilepsy , electroencephalography , neuroscience , scalp , medicine , hippocampal formation , stereoelectroencephalography , psychology , surgery
We studied 40 patients with temporal lobe epilepsies who had long‐term intracranial EEC 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.