ArticleJournal of neurosurgery2025
Functional mapping of movement and speech using task-based electrophysiological changes in stereoelectroencephalography.
Article in Journal of neurosurgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Language mapped to a high-resolution brain atlas for surgical evaluation of epilepsy patients.Epilepsia · 2026Article
- The human insula encodes somatotopic representation of motor execution with an effector-specific connectome map to primary motor cortex.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- sEEG-based brain-computer interfacing in a large adult and pediatric cohort.Journal of neural engineering · 2025Article
- Review
- Attenuation of High Gamma Activity by Repetitive Motor Tasks.Human brain mapping · 2025Article
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Abstract
objectiveStereoelectroencephalography (SEEG) has become the predominant method for intracranial seizure localization. When imaging, semiology, and scalp EEG findings are not in full agreement or definitively localizing, implanted SEEG recordings are used to test candidate seizure onset zones (SOZs). Discovered SOZs may then be targeted for resection, laser ablation, or neurostimulation. If an SOZ is eloquent, resection and ablation are both contraindicated, so identifying functional representation is crucial for therapeutic decision-making. The authors present a novel functional brain mapping technique that utilizes task-based electrophysiological changes in SEEG during behavioral tasks and test this in pediatric and adult patients.
methodsSEEG was recorded in 20 patients with epilepsy who ranged in age from 6 to 39 years (12 female, 18 of 20 patients < 21 years of age) and underwent implanted monitoring to identify seizure onset. Each performed 1) visually cued simple repetitive movements of the hand, foot, or tongue while electromyography was recorded; and 2) simple picture-naming or verb-generation speech tasks while audio was recorded. Broadband changes in the power spectrum of the SEEG recording were compared between behavior and rest.
resultsElectrophysiological functional mapping of movement and/or speech areas was completed in all 20 patients. Eloquent representation was identified in both cortex and white matter and generally corresponded to classically described functional anatomical organization as well as other clinical mapping results. Robust maps of brain activity were identified in healthy brain, regions of developmental or acquired structural abnormality, and SOZs.
conclusionsTask-based electrophysiological mapping using broadband changes in the SEEG signal reliably identifies movement and speech representation in pediatric and adult epilepsy patients.
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