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The Necessity for Sphenoidal Electrodes in the Presurgical Evaluation of Temporal Lobe Epilepsy: Con Position

Blume, Warren T.


Summary This article reviews several lines of evidence that efface the requirement for sphenoidal leads in the EEG investigation of temporal lobe epilepsy. Mandibular notch or anterior temporal electrodes, each situated well within the anterior temporal spike field, detect interictal and ictal epileptiform phenomena virtually as well as do sphenoidal leads, provide consistent recording circumstances, do not require physician expertise for their placement, and create no discomfort. This article also cites many studies demonstrating the reliability of ictal semeiology and of MRI in lateralizing and localizing temporal epileptogenesis. Thus, EEG constitutes one element in a matrix of lateralizing data.

London Health Sciences Centre-University Campus, The University of Western Ontario, London, Ontario, Canada

Address correspondence and reprint requests to Dr. W.T. Blume, London Health Sciences Centre-University Campus, 339 Windermere Road, London, Ontario, Canada, N6A 5A5.

Copyright © 2003 American Clinical Neurophysiology Society