[HTML][HTML] Delta oscillation coupled propagating fast ripples precede epileptiform discharges in patients with focal epilepsy

SA Weiss, L Sheybani, N Seenarine, I Fried, C Wu… - Neurobiology of …, 2022 - Elsevier
Epileptiform spikes are used to localize epileptogenic brain tissue. The mechanisms that
spontaneously trigger epileptiform discharges are not yet elucidated. Pathological fast ripple …

Ripples on spikes show increased phase‐amplitude coupling in mesial temporal lobe epilepsy seizure‐onset zones

SA Weiss, I Orosz, N Salamon, S Moy, L Wei… - …, 2016 - Wiley Online Library
Summary Objective Ripples (80–150 Hz) recorded from clinical macroelectrodes have been
shown to be an accurate biomarker of epileptogenic brain tissue. We investigated coupling …

Pathological neurons generate ripples at the UP‐DOWN transition disrupting information transfer

SA Weiss, I Fried, J Engel Jr, A Bragin, S Wang… - …, 2024 - Wiley Online Library
Objective To confirm and investigate why pathological high‐frequency oscillations (pHFOs),
including ripples (80–200 Hz) and fast ripples (200–600 Hz), are generated during the UP …

Network mechanisms for fast ripple activity in epileptic tissue

R Köhling, K Staley - Epilepsy research, 2011 - Elsevier
Fast ripples are high-frequency, 250–600Hz field potential oscillations which can be
recorded from hippocampal or neocortical structures. In the neocortex, fast ripples occur …

High-frequency oscillations and mesial temporal lobe epilepsy

M Lévesque, Z Shiri, LY Chen, M Avoli - Neuroscience Letters, 2018 - Elsevier
The interest of epileptologists has recently shifted from the macroscopic analysis of interictal
spikes and seizures to the microscopic analysis of short events in the EEG that are not …

Fast ripple analysis in human mesial temporal lobe epilepsy suggests two different seizure-generating mechanisms

J Schönberger, B Frauscher, N von Ellenrieder… - Neurobiology of …, 2019 - Elsevier
Objective The distinction of hypersynchronous (HYP) and low-voltage fast (LVF) onset
seizures in mesial temporal lobe epilepsy (MTLE) is well established, but classifying …

Bimodal coupling of ripples and slower oscillations during sleep in patients with focal epilepsy

I Song, I Orosz, I Chervoneva, ZJ Waldman, I Fried… - …, 2017 - Wiley Online Library
Objective Differentiating pathologic and physiologic high‐frequency oscillations (HFO s) is
challenging. In patients with focal epilepsy, HFO s occur during the transitional periods …

Fast ripples reflect increased excitability that primes epileptiform spikes

SA Weiss, I Fried, J Engel Jr, MR Sperling… - Brain …, 2023 - academic.oup.com
The neuronal circuit disturbances that drive inter-ictal and ictal epileptiform discharges
remain elusive. Using a combination of extra-operative macro-electrode and micro-electrode …

Stereotyped high-frequency oscillations discriminate seizure onset zones and critical functional cortex in focal epilepsy

S Liu, C Gurses, Z Sha, MM Quach, A Sencer, N Bebek… - Brain, 2018 - academic.oup.com
High-frequency oscillations in local field potentials recorded with intracranial EEG are
putative biomarkers of seizure onset zones in epileptic brain. However, localized 80–500 Hz …

Evoked versus spontaneous high frequency oscillations in the chronic electrocorticogram in focal epilepsy

MA Van't Klooster, NEC Van Klink, D Van Blooijs… - Clinical …, 2017 - Elsevier
Objective Spontaneous high frequency oscillations (HFOs; ripples 80–250 Hz, fast ripples
(FRs) 250–500 Hz) are biomarkers for epileptogenic tissue in focal epilepsy. Single pulse …