Shadows of very high-frequency oscillations in routine stereoelectroencephalography

Author:

Vasickova Zuzana1,Klimes Petr2,Cimbalnik Jan3,Travnicek Vojtech3,Pail Martin1,Halamek Josef2,Jurak Pavel2,Brazdil Milan1

Affiliation:

1. Brno Epilepsy Center, Department of Neurology, St. Anne’s University Hospital, Faculty of Medicine, Masaryk University

2. Institute of Scientific Instruments

3. International Clinical Research Center of St. Anne's University Hospital Brno

Abstract

Abstract Very high-frequency oscillations (VHFOs, > 500 Hz) are more specific in localizing the epileptogenic zone (EZ) than high-frequency oscillations (HFOs, < 500 Hz). Unfortunately, VHFOs are not visible in standard clinical stereo-EEG (SEEG) recordings with sampling rates of 1 kHz or lower. Here we show that “shadows” of VHFOs can be found in frequencies below 500 Hz and can help us to identify SEEG channels with a higher probability of increased VHFO rates. Subsequent analysis of Logistic regression models on 141 SEEG channels from thirteen patients shows that VHFO “shadows” provide additional information to gold standard HFO analysis and can potentially help in precise EZ delineation in standard clinical recordings.

Publisher

Research Square Platform LLC

Reference26 articles.

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