Normative high-frequency oscillation phase-amplitude coupling and effective connectivity under sevoflurane.

ABSTRACT: Resective surgery for paediatric drug-resistant focal epilepsy often requires extraoperative intracranial electroencephalography recording to accurately localize the epileptogenic zone. This procedure entails multiple neurosurgeries, intracranial electrode implantation and explantation, and days of invasive in-patient evaluation. There is a need for methods to reduce the diagnostic burden and introduce objective epilepsy biomarkers. Our preliminary studies aimed to address these issues by using sevoflurane anaesthesia to rapidly and reversibly activate intraoperative phase-amplitude coupling between delta and high-frequency activities, as well as high-frequency activity-based effective connectivity. Phase-amplitude coupling can serve as a proxy for spike-and-wave discharges, and effective

SUBMITTER: Firestone E 

PROVIDER: S-EPMC12582361 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature