Journal
CLINICAL NEUROPHYSIOLOGY
Volume 129, Issue 1, Pages 145-154Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.clinph.2017.10.018
Keywords
Articulation; Vocalization; Auditory and visual perception; Eloquent areas; Artifacts; High-frequency oscillations (HFOs); Ripples; Subdural electroencephalography (EEG); Intracranial electrocorticography (ECoG) recording; Pediatric epilepsy surgery; Language; Speech
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Funding
- NIH grant [NS64033]
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A number of investigators have reported that event-related augmentation of high-gamma activity at 70-110 Hz on electrocorticography (ECoG) can localize functionally-important brain regions in children and adults who undergo epilepsy surgery. The advantages of ECoG-based language mapping over the gold-standard stimulation include: (i) lack of stimulation-induced seizures, (ii) better sensitivity of localization of language areas in young children, and (iii) shorter patient participant time. Despite its potential utility, ECoG-based language mapping is far less commonly practiced than stimulation mapping. Here, we have provided video presentations to explain, point-by-point, our own hardware setting and time-frequency analysis procedures. We also have provided standardized auditory stimuli, in multiple languages, ready to be used for ECoG-based language mapping. Finally, we discussed the technical aspects of ECoG-based mapping, including its pitfalls, to facilitate appropriate interpretation of the data. (C) 2017 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
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