Electrophysiological investigations in childhood epilepsy surgery

Neuro-Chirurgie
M FohlenO Delalande

Abstract

Epilepsy surgery in children is a functional surgery: its goal is to perform the resection of the epileptic brain tissue while sparing the eloquent cortex. Prolonged scalp video-EEGs allow recording of all types of seizures and play a crucial role in localizing the epileptogenic zone. Furthermore, EEG data correlation with clinical and radiological findings provides a guide for the surgical strategy: either resection without further investigations or an invasive recording procedure. In prehemispherotomy evaluation, EEG recordings confirm that limited resections are not indicated and demonstrate that the opposite hemisphere is not involved. If invasive recordings are needed, they consist in foramen ovale electrode insertion, which provides valuable information in mesial temporal lobe epilepsy, stereoelectroencephalography for children older than two years, and subdural grids associated with depth electrodes in infants or when the eloquent areas need to be carefully investigated. Such investigations allow tailoring surgery to each child.

References

Apr 1, 1992·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·P JayakarT J Resnick
Mar 14, 2000·Epilepsia·S A LeeS S Spencer
Mar 23, 2000·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·S VicariE Bates
Feb 15, 2002·Brain : a Journal of Neurology·Lucie Hertz-PannierDenis Le Bihan
Feb 14, 2007·Epilepsia·Demetrios VelisUNKNOWN ILAE DMC Subcommittee on Neurophysiology

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Citations

Dec 2, 2014·Neurophysiologie clinique = Clinical neurophysiology·N André-ObadiaM D Lamblin
Feb 18, 2015·Neurophysiologie clinique = Clinical neurophysiology·A MontavontD Taussig

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