Intra-operative cortical motor mapping using subdural grid electrodes in children undergoing epilepsy surgery evaluation and comparison with the conventional extra-operative motor mapping

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
Puneet JainCristina Go

Abstract

The objective of this study was to review our experience with intra-operative "train of five" stimulation using subdural grid for motor mapping in children undergoing epilepsy surgery evaluation. Twenty consecutive children below 18-years of age with drug-refractory epilepsy who underwent invasive-EEG monitoring using subdural-grid placement and intra-operative motor mapping using direct cortical stimulation by sub-dural grid electrodes (IODCS-SDG) at our institution between January-2016 and June-2017 were reviewed. Stimulation was delivered through the subdural-grid electrodes using a train-of-five pulses and muscle responses were recorded by motor-evoked-potentials (MEPs). Intra-operative direct cortical stimulation delivered through a ball-tipped probe (IODCS-probe) and extra-operative motor-mapping (EODCS-SDG) were also performed. IODCS-SDG was completed in 20 patients and subsequent EODCS-SDG was done in 17/20 patients. MEP responses were more commonly obtained in the deltoid (19/20), extensor-digitorum-communis (20/20) and first-dorsal-interosseus (19/20). The median thresholds varied between 40 V and 60 V for the six muscle groups. The respective IODCS-probe thresholds tended to be similar. No stimulation-provoked seizur...Continue Reading

Citations

Jun 30, 2019·Journal of Neurosurgery. Pediatrics·Eisha A ChristianJames T Rutka
Aug 20, 2019·Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery·Jonathan RothShlomi Constantini
Jul 22, 2020·World Neurosurgery·Claudia M Kuzan-FischerCaitlin E Hoffman
Sep 23, 2021·Journal of Neurophysiology·Olivia N ArskiGeorge M Ibrahim

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