Journal article

Spatiotemporal Patterns of High-Frequency Activity (80-170 Hz) in Long-Term Intracranial EEG

Zhuying Chen, David B Grayden, Anthony N Burkitt, Udaya Seneviratne, Wendyl J D'Souza, Chris French, Philippa J Karoly, Katrina Dell, Kent Leyde, Mark J Cook, Matias I Maturana

Neurology | LIPPINCOTT WILLIAMS & WILKINS | Published : 2021

Abstract

OBJECTIVE: To determine the utility of high-frequency activity (HFA) and epileptiform spikes as biomarkers for epilepsy, we examined the variability in their rates and locations using long-term ambulatory intracranial EEG (iEEG) recordings. METHODS: This study used continuous iEEG recordings obtained over an average of 1.4 years from 15 patients with drug-resistant focal epilepsy. HFA was defined as 80- to 170-Hz events with amplitudes clearly larger than the background, which was automatically detected with a custom algorithm. The automatically detected HFA was compared with visually annotated high-frequency oscillations (HFOs). The variations of HFA rates were compared with spikes and seiz..

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Grants

Awarded by China Scholarship Council


Awarded by Australian National Health and Medical Research Council


Funding Acknowledgements

Supported by China Scholarship Council (201709120011) and an Australian National Health and Medical Research Council Project Grant (1130468).