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Mapping interictal oscillations greater than 200 Hz recorded with intracranial macroelectrodes in human epilepsy

Benoît Crépon, Vincent Navarro, Dominique Hasboun, Stéphane Clemenceau, Jacques Martinerie, Michel Baulac, Claude Adam, Michel Le Van Quyen
2009 Brain  
Recent work suggests that similar high-frequency oscillations can be detected in the seizure onset zone using standard diagnostic macroelectrodes.  ...  Keywords: high-frequency oscillations; mesial temporal lobe epilepsy; intracranial EEG; fast ripple; seizure onset zone Abbreviations: EEG = Electroencephalography; FR = fast ripple; HFOs = high-frequency  ...  Acknowledgements The authors thank Richard Miles for helpful comments on the manuscript and Laurent Hugueville for technical assistance with the EEG amplification system.  ... 
doi:10.1093/brain/awp277 pmid:19920064 fatcat:7xvc4u2nqfdubmduzj452yowqm

High-frequency oscillations as a new biomarker in epilepsy

Maeike Zijlmans, Premysl Jiruska, Rina Zelmann, Frans S.S. Leijten, John G.R. Jefferys, Jean Gotman
2012 Annals of Neurology  
Potential Conflicts of Interest  ...  In epilepsy, high-frequency oscillations (HFOs, >80Hz) have proven particularly important and useful.  ...  However, in channels with very frequent HFOs the use of baseline segments to calculate the energy threshold improves the detection. 67 All automatic methods involve the human validation of automatically  ... 
doi:10.1002/ana.22548 pmid:22367988 pmcid:PMC3754947 fatcat:kixq3gjjcnatrmirdlksrd4aum

The Onset of Interictal Spike-Related Ripples Facilitates Detection of the Epileptogenic Zone

Yurika Numata-Uematsu, Mitsugu Uematsu, Rie Sakuraba, Masaki Iwasaki, Shinichiro Osawa, Kazutaka Jin, Nobukazu Nakasato, Shigeo Kure
2021 Frontiers in Neurology  
By contrast, high-frequency oscillations (HFOs) could be useful markers of the EZ.  ...  Hence, we aimed to detect the EZ using interictal spikes and investigated whether the onset area of interictal spike-related HFOs was within the EZ.Methods: The EZ is considered to be included in the resection  ...  Human intracranial high frequency oscillations (HFOs) detected by automatic time-frequency analysis. PLoS ONE.  ... 
doi:10.3389/fneur.2021.724417 pmid:34803874 pmcid:PMC8599368 fatcat:er2gdd4d2fhplaun2dhhus3rcy

Update on the mechanisms and roles of high-frequency oscillations in seizures and epileptic disorders

Premysl Jiruska, Catalina Alvarado-Rojas, Catherine A. Schevon, Richard Staba, William Stacey, Fabrice Wendling, Massimo Avoli
2017 Epilepsia  
Presence of HFOs at the time of rolandic spikes correlates with seizure frequency.  ...  In epilepsy, research of the past decade focused particularly on interictal high-frequency oscillations (HFOs) > 80 Hz. The first large application of HFOs was in the context of epilepsy surgery.  ...  Milestones in human HFO research In 1992, high-frequency (HF) activity in the EEG was first investigated at seizure onset. 4, 5 Independently, in 1999, a different type of brief interictal fast oscillatory  ... 
doi:10.1111/epi.13830 pmid:28681378 pmcid:PMC5554080 fatcat:g4yquoykwfe45j7kyrtd2dnmay

Automatic detection of prominent interictal spikes in intracranial EEG: Validation of an algorithm and relationsip to the seizure onset zone

Nicolas Gaspard, Rafeed Alkawadri, Pue Farooque, Irina I. Goncharova, Hitten P. Zaveri
2014 Clinical Neurophysiology  
To develop an algorithm for the automatic quantitative description and detection of spikes in the intracranial EEG and quantify the relationship between prominent spikes and the seizure onset zone.  ...  Quantitative analysis of time-frequency characteristics and spatial distribution of intracranial spikes provides complementary information that may be useful for the localization of the seizure-onset zone  ...  ., and H.P.Z. have nothing to disclose. Appendix A. Supplementary data  ... 
doi:10.1016/j.clinph.2013.10.021 pmid:24269092 pmcid:PMC5123744 fatcat:gw2k2rxyong7jefl22vqepb67a

Expert consensus on clinical applications of high-frequency oscillations in epilepsy

Yuping Wang, Dong Zhou, Xiaofeng Yang, Xin Xu, Liankun Ren, Tao Yu, Wenjing Zhou, Xiaoqiu Shao, Zhixian Yang, Shuang Wang, Dezhi Cao, Chunyan Liu (+2 others)
2020 Acta Epileptologica  
Background High-frequency oscillations (HFOs) have become a new biomarker of epileptogenic zone in the brain.  ...  Studies in animal models of epilepsy and pre-surgical patients have unanimously found a strong correlation between high-frequency oscillations (HFOs, > 80 Hz) and the epileptogenic zone, suggesting that  ...  resonance imaging; MEG: Magnetoencephalography; SSAE: Stacked sparse autoencoder; SOZ: Seizure onset zone; TLE: Temporal lobe epilepsy; VHFOs: Very high frequency oscillations  ... 
doi:10.1186/s42494-020-00018-w fatcat:4fvjv47lmfcwdgq7wnqfrvbjzi

High-frequency oscillations (HFOs) in clinical epilepsy

J. Jacobs, R. Staba, E. Asano, H. Otsubo, J.Y. Wu, M. Zijlmans, I. Mohamed, P. Kahane, F. Dubeau, V. Navarro, J. Gotman
2012 Progress in Neurobiology  
High-frequency oscillations (HFOs) between 80 and 500 Hz, which can be recorded with EEG, may be novel markers of the epileptogenic zone.  ...  EC Entorhinal cortex EEG Electroencephalogram EZ Epileptogenic zone HFO High frequency oscillation HS Hippocampal sclerosis MEG Magnetencephalogram MTLE Mesial temporal lobe epilepsy SOZ Seizure onset  ...  Acknowledgments This publication is the outcome of the workshop "High Frequency Oscillations in Epilepsy and Cognition" held at the Montreal Neurological Institute on June 2-4, 2011.  ... 
doi:10.1016/j.pneurobio.2012.03.001 pmid:22480752 pmcid:PMC3674884 fatcat:svii4mhjrvdqjm37yzrxyp6auu

Occurrence of scalp-fast oscillations among patients with different spiking rate and their role as epileptogenicity marker

Federico Melani, Rina Zelmann, François Dubeau, Jean Gotman
2013 Epilepsy Research  
feature influences fast oscillation occurrence and their significance as markers of the seizure onset zone (SOZ).  ...  Introduction-We aim to analyze the fast oscillations in the scalp EEG of focal epilepsy patients with low-to-high rates of interictal epileptiform discharges (IEDs), in order to determine how this neurophysiological  ...  Her current research focuses on the characterization and automatic detection of high-frequency oscillations (80-500 Hz) in intracranial recordings in humans with intractable epilepsy; she published various  ... 
doi:10.1016/j.eplepsyres.2013.06.003 pmid:23932079 pmcid:PMC4490901 fatcat:k4htz3rbyjbrdkelyciufeflue

Current and Emerging Potential of Magnetoencephalography in the Detection and Localization of High-Frequency Oscillations in Epilepsy

Eleonora Tamilia, Joseph R. Madsen, Patricia Ellen Grant, Phillip L. Pearl, Christos Papadelis
2017 Frontiers in Neurology  
Abbreviations: ECG, electrocardiography; EEG, electroencephalography; EMG, electromyography; EOG, electrooculography; EZ, epileptogenic zone; fMRI, functional magnetic resonance imaging; HFO, high-frequency  ...  Our goal is to highlight the emerging potential of MEG in the non-invasive detection and localization of HFOs for the presurgical evaluation of patients with medically refractory epilepsy (MRE).  ...  HigH-FReQUeNCY OSCiLLATiONS AS A New BiOMARKeR OF ePiLePSY High-frequency oscillations in epilepsy are generally described as short spontaneous EEG patterns in the frequency range from 80 to 500 Hz, consisting  ... 
doi:10.3389/fneur.2017.00014 pmid:28194133 pmcid:PMC5276819 fatcat:4rfza7s3ebd5npiavap7v3odiy

Seizure Onset Zone Identification From iEEG: A Review

Sai Sanjay Balaji, Keshab K. Parhi
2022 IEEE Access  
INDEX TERMS Epilepsy, epileptogenic zone, high frequency oscillations, iEEG, seizure, seizure onset zone.  ...  This, however, is time-consuming and can be prone to human error. Thus, there has been significant research on the automatic detection of SOZ.  ...  These regions are called the seizure onset zones (SOZs) or epileptogenic zone. In most cases, intracranial electroencephalography (iEEG) helps in the identification of SOZ in humans.  ... 
doi:10.1109/access.2022.3182716 fatcat:ss56oj3pgzaaljdavq6rojpjp4

Data mining neocortical high-frequency oscillations in epilepsy and controls

J. A. Blanco, M. Stead, A. Krieger, W. Stacey, D. Maus, E. Marsh, J. Viventi, K. H. Lee, R. Marsh, B. Litt, G. A. Worrell
2011 Brain  
frequency oscillations (median spectral centroid = 305 Hz); (ii) we found no difference in the rates of high frequency oscillations in control neocortex and the non-seizure-onset zone neocortex of patients  ...  Oscillations were automatically detected and classified using an unsupervised approach in a data set of unprecedented volume in epilepsy research, over 12 terabytes of continuous long-term micro-and macro-electrode  ...  Acknowledgements We thank Ed Nieh, Cindy Nelson, Karla Crockett and Stacey Seidl for assistance with data management and Steve Isard for valuable technical discussions.  ... 
doi:10.1093/brain/awr212 pmid:21903727 pmcid:PMC3187540 fatcat:zl7fwxqiwffjvnbjhr23m7djhq

Recent advances in the noninvasive detection of high-frequency oscillations in the human brain

Yuying Fan, Liping Dong, Xueyan Liu, Hua Wang, Yunhui Liu
2020 Reviews in the Neurosciences  
AbstractIn recent decades, a significant body of evidence based on invasive clinical research has showed that high-frequency oscillations (HFOs) are a promising biomarker for localization of the seizure  ...  onset zone (SOZ), and therefore, have the potential to improve postsurgical outcomes in patients with epilepsy.  ...  Jing Xiang (Director of MEG center, Division of Neurology, Cincinnati Children's Medical Center, USA) very much for revising and editing the manuscript.  ... 
doi:10.1515/revneuro-2020-0073 pmid:33661582 fatcat:o3gh4nombbdb7lbrra4meyjyg4

Brain–Computer Interface (BCI) Applications in Mapping of Epileptic Brain Networks Based on Intracranial-EEG: An Update

Rafeed Alkawadri
2019 Frontiers in Neuroscience  
Recording of seizures and localization of the Seizure Onset Zone (SOZ) in the subgroup of "surgical" patients, who require intracranial-EEG (icEEG) evaluations, remain to date the best available surrogate  ...  The clinical care remains inspired by the original practices of recording the seizures and expert visual analysis of rhythms at onset.  ...  ACKNOWLEDGMENTS The author wishes to thank Rebecca Khozein DOM, MS, REEG/EPT, RPSGT, RNCST, and Tamara Wing REEGT for assistance in EEG data acquisition.  ... 
doi:10.3389/fnins.2019.00191 pmid:30971871 pmcid:PMC6446441 fatcat:eqjc4sxsavcehca62dymnim5rm

How Can We Identify Ictal and Interictal Abnormal Activity? [chapter]

Robert S. Fisher, Helen E. Scharfman, Marco deCurtis
2014 Advances in Experimental Medicine and Biology  
EEG activity during normal behavior that resembles spike-wave discharge or bursts of rhythmic spiking.  ...  This definition has been used since the era of Hughlings Jackson, and does not take into account subsequent advances made in epilepsy and neuroscience research.  ...  Since then, he has been a pioneer and thought leader in so many ways, and a mentor to generations of epilepsy researchers.  ... 
doi:10.1007/978-94-017-8914-1_1 pmid:25012363 pmcid:PMC4375749 fatcat:l4qa5hdwuzffdjc3infwz35ruq

Localization of the Epileptogenic Zone Using High Frequency Oscillations

Aljoscha Thomschewski, Ana-Sofía Hincapié, Birgit Frauscher
2019 Frontiers in Neurology  
The current gold standard for identification of the EZ is the seizure-onset zone (SOZ).  ...  Prospective assessments of the use of HFOs for surgery planning using automatic detection of HFOs are needed in order to determine their clinical value.  ...  ., postdoc at the Montreal Neurological Institute and Hospital, for his help in preparing the time frequency plots for Figure 2.  ... 
doi:10.3389/fneur.2019.00094 pmid:30804887 pmcid:PMC6378911 fatcat:xxwv7ze54ngjrfik2yvby6ectq
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