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Updated: Aug 5, 2025
Functional Mapping with Simultaneous MEG and EEG
Published on: June 14, 2010
Mapping the Central Sulcus Extraoperatively Using Stereoelectroencephalography: A New Application of an Established
Ammar Kheder1,2,3, Ruba Al-Ramadhani4, Sonam Bhalla2,3
1Department of Neurology, Emory University School of Medicine, Atlanta, GeorgiaU.S.A.
Purpose:
Central sulcus localization is undertaken intraoperatively with subdural electrodes through a phase reversal technique using somatosensory evoked potentials from sensorimotor cortices. Extraoperative central sulcus localization using stereoelectroencephalography has not been described previously.
Methods:
Six pediatric patients (aged 12-18 years, 50% females) were investigated with stereoelectroencephalography. Peripheral median and posterior tibial nerve stimulation were performed while recording somatosensory evoked potentials from stereoelectroencephalography electrodes.
Results:
Central sulcus was successfully localized by this novel method, and this was further supplemented by cortical stimulation data.
Conclusions:
This is the first report of somatosensory evoked potentials gained using stereoelectroencephalography in primary motor and sensory cortices. This can further supplement other data for safe surgical resection in the eloquent cortex.
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