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Preoperative Electroencephalographic Investigation in Frontal Lobe Epilepsy: Electroencephalographic and Electrocorticographic Recordings

Published online by Cambridge University Press:  18 September 2015

L.F. Quesney
L.F. Quesney*
Affiliation:
Montreal Neurological Institute and Hospital, Montreal
*
Montreal Neurological Institute and Hospital, McGill University, 3801 University Street, Montreal, Quebec, Canada H3A 2B4
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Abstract:

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The first section of this article deals with specific anatomic and pathophysiologic factors which contribute to a poor EEG localization of the interictal epileptic abnormality and to the unreliable seizure onset localization commonly reported in patients with frontal lobe epilepsy. The localizing effectiveness of long term EEG monitoring was reviewed in four different groups of frontal lobe epileptic patients who underwent preoperative EEG investigation with extracranial and intracranial electrodes. The results of this study reveal a continuum distribution of interictal epileptic disturbances, ranging from focal abnormalities to lobar or multi-lobar epileptogenesis. A frontal lobe localization of the seizure generator based on ictal recordings obtained with extracranial electrodes is rather poor and much more reliable results can be obtained by depth-electroencephalography.

Type
Research Article
Information
Canadian Journal of Neurological Sciences , Volume 18 , Issue S4 , November 1991 , pp. 559 - 563
Copyright
Copyright © Canadian Neurological Sciences Federation 1991

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