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Ictal propagation of high frequency activity is recapitulated in interictal recordings: Effective connectivity of epileptogenic networks recorded with intracranial EEG
2014
NeuroImage
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the directionality and intensity of propagation of high frequency activity (70-175 Hz) during ictal and interictal recordings. ...
We hypothesized that the patterns by which high frequency activity is propagated would help elucidate epileptogenic networks and thereby identify network nodes relevant for surgical planning. ...
Conclusions SdDTF analysis of effective connectivity for high frequency activity (70-175 Hz) in ictal, pre-ictal and interictal recordings may help estimate the epileptogenic zone during invasive monitoring ...
doi:10.1016/j.neuroimage.2014.06.078
pmid:25003814
pmcid:PMC4165796
fatcat:gmsrldbgtrcd3f7ke3ycynfs5m
Defining the latent period of epileptogenesis and epileptogenic zone in a focal cortical dysplasia type II (FCDII) rat model
2021
Epilepsia
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We then took advantage of in vivo local field potential (LFP) recordings to localize the epileptogenic zone in these animals. ...
Focal cortical dysplasia type II (FCDII) is one of the most common underlying pathologies in patients with drug-resistant epilepsy. ...
AUTHOR CONTRIBUTIONS Y.W. contributed to the conception and design of this study. All authors contributed to the acquisition and analysis of data. Y.W drafted the text. ...
doi:10.1111/epi.16868
pmid:33735460
fatcat:4shpgw4ozneajdgj23any5qdrm
Mapping the epileptic brain with EEG dynamical connectivity: Established methods and novel approaches
2012
The European Physical Journal Plus
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Some of these methods explore the dynamical connections between brain regions, exploiting the high temporal resolution of the electroencephalographic signals recorded at the scalp or directly from the ...
region where the seizure originates from and of detecting upcoming seizure activity in order to trigger therapeutic neurostimulation devices. ...
The sampling frequency of the recorded EEG signals is 256 Hz. ...
doi:10.1140/epjp/i2012-12144-5
fatcat:sygjnwec45dzvbyzilwhcyihpe
How do we use in vitro models to understand epileptiform and ictal activity? A report of the TASK1-WG4 group of the ILAE/AES Joint Translational Task Force
2018
Epilepsia Open
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A great deal of knowledge about how brain networks generate various forms of epileptiform activity has been gained, but due to the multiple in vitro models and manipulations used, there is a need for a ...
In vitro brain tissue preparations allow the convenient and affordable study of brain networks and have allowed us to garner molecular, cellular, and electrophysiologic insights into brain function with ...
Uwe was a true leader in the field of epilepsy research. We would also like to acknowledge Lauren-Harte-Hargrove for assistance during the preparation of this manuscript. ...
doi:10.1002/epi4.12277
pmid:30525115
pmcid:PMC6276782
fatcat:3x5uyuq4qbfydn4ffjqip6or3u
Multimodal in vivo recording using transparent graphene microelectrodes illuminates spatiotemporal seizure dynamics at the microscale
[article]
2020
bioRxiv
pre-print
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progression of ictal electrophysiology is linked to the spatial evolution of the recruited seizure core. ...
Here we present a technique to map the onset and spatiotemporal spread of acute epileptic seizures in vivo by simultaneously recording high bandwidth microelectrocorticography and calcium fluorescence ...
Any opinions, findings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. ...
doi:10.1101/2020.06.04.134189
fatcat:bdax4w3gt5grzm7h27drq7xijq
Multimodal in vivo recording using transparent graphene microelectrodes illuminates spatiotemporal seizure dynamics at the microscale
2021
Communications Biology
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progression of ictal electrophysiology is linked to the spatial evolution of the recruited seizure core. ...
Here we present a technique to map the onset and spatiotemporal spread of acute epileptic seizures in vivo by simultaneously recording high bandwidth microelectrocorticography and calcium fluorescence ...
Acknowledgements This material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program (DGE-1845298 to Driscoll, Murphy) and was carried out in part at the ...
doi:10.1038/s42003-021-01670-9
pmid:33514839
fatcat:sy4nsoxe6nhqtemdgif7oao564
High interictal connectivity within the resection zone is associated with favorable post-surgical outcomes in focal epilepsy patients
2019
NeuroImage: Clinical
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We generate interictal functional networks by calculating pairwise correlation of iEEG signals across different frequency bands. ...
The goal of this study is to evaluate the utility of mapping interictal (non-seizure) iEEG networks to identify targets for surgical treatment. ...
Acknowledgements This work was supported by National Institutes of Health grants 1R01NS099348 and K23-NS073801. ...
doi:10.1016/j.nicl.2019.101908
pmid:31491812
pmcid:PMC6617333
fatcat:ogah4tclirgkphyuhsfhhsgrmi
High interictal connectivity within the resection zone is associated with favorable post-surgical outcomes in focal epilepsy patients
[article]
2018
bioRxiv
pre-print
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We generate interictal functional networks by calculating pairwise correlation of iEEG signals across different frequency bands. ...
The goal of this study is to evaluate the utility of mapping interictal (non-seizure) iEEG networks to identify targets for surgical treatment. ...
is further supported by recent studies demonstrating that ictal and interictal iEEG network subgraphs are topologically similar, and that patterns of high frequency activity propagation during seizures ...
doi:10.1101/459008
fatcat:phgmqstk25hhbcvtb6bcsumheu
Low Consistency of Four Brain Connectivity Measures Derived from Intracranial Electrode Measurements
2014
Frontiers in Neurology
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A second measure is the recent development of simultaneous BOLD fMRI and intracranial electrode stimulation. The resulting BOLD maps form a measure of effective connectivity. ...
Using a group of eight epilepsy patients with intracranial electrodes, the connectivity from one method is compared to another method using all paired data points that are in common, yielding an overall ...
One of the major problems in the process of the presurgical localization of the EZ through scalp EEG recordings is the issue of false localization of a surface activity that is the result of a network/ ...
doi:10.3389/fneur.2014.00272
pmid:25566178
pmcid:PMC4271609
fatcat:e7qfc7lruncwxflv2ndcdrfmdy
On the nature of seizure dynamics
2014
Brain
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Seizure onset is reached upon the collision of normal brain trajectories with the separatrix. ...
Seizures can occur spontaneously and in a recurrent manner, which defines epilepsy; or they can be induced in a normal brain under a variety of conditions in most neuronal networks and species from flies ...
El Houssaini for help in preparing ...
doi:10.1093/brain/awu133
pmid:24919973
pmcid:PMC4107736
fatcat:6i353am36bajznhavdly5zlk4u
Dynamic Neurovascular Coupling and Uncoupling during Ictal Onset, Propagation, and Termination Revealed by Simultaneous In Vivo Optical Imaging of Neural Activity and Local Blood Volume
2012
Cerebral Cortex
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Traditional models of ictal propagation involve the concept of an initiation site and a progressive outward march of activation. ...
consist of multiple dynamic multidirectional waves of membrane potential change with variable onset sites that spread through a widespread network. ...
Conflict of Interest : None declared. ...
doi:10.1093/cercor/bhs079
pmid:22499798
pmcid:PMC3593576
fatcat:ho6bwih445duhm3i4pizrzgck4
Commonalities in epileptogenic processes from different acute brain insults: Do they translate?
2017
Epilepsia
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In diverse human epilepsies and animal models, seizures appear to propagate within a limbic or thalamocortical/corticocortical network. ...
Treatment is effective for only 60%-70% of patients and remains symptomatic despite decades of effort to develop epilepsy prevention therapies. ...
these findings will predict later epilepsy, or whether detection of acute high-frequency oscillations (HFOs) with this type of recording will be as predictive as they are in animal models 20 , remains ...
doi:10.1111/epi.13965
pmid:29247482
pmcid:PMC5993212
fatcat:gpp6ve6akfcf7jvp3eplswo6ua
A taxonomy of seizure dynamotypes
2020
eLife
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Seizures are a disruption of normal brain activity present across a vast range of species and conditions. ...
The 'dynamotype' of a seizure is the dynamic composition that defines its observable characteristics, including how it starts, evolves and ends. ...
This timeseries is high pass filtered to simulate the effect of AC recordings. The non-filtered simulation is shown in (C). (D) A portion of a long status epilepticus recorded in one patient. ...
doi:10.7554/elife.55632
pmid:32691734
fatcat:2qdvuqbc5bd5rbtcvd6bugm5ve
Epidynamics characterize and navigate the map of seizure dynamics
[article]
2020
bioRxiv
pre-print
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We provide the first objective taxonomy of seizures based on a straightforward analysis of EEG data. ...
Seizures are a disruption of normal brain activity present across a vast range of species, diseases, and conditions. ...
This timeseries is high pass filtered to simulate the effect of AC recordings. The non-filtered simulation is shown in C. D: A portion of a long status epilepticus recorded in one patient. ...
doi:10.1101/2020.02.08.940072
fatcat:nnejqsfjnrb63fnuxsodux32sm
29th Annual Computational Neuroscience Meeting: CNS*2020
2020
BMC Neuroscience
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by visual experience, and (iii) how patterns of neural activity in the zebrafish brain develop to facilitate precisely targeted hunting behaviour. ...
Investigations of this question have, to date, focused largely on deep neural networks trained using supervised learning, in tasks such as image classification. ...
Acknowledgements: This research is funded by the National Science Foundation (grants #1822517 and #1921515 to SJ), the National Institute of Mental Health (grant #MH117488 to SJ), the California Nano-Systems ...
doi:10.1186/s12868-020-00593-1
pmid:33342424
fatcat:edosycf35zfifm552a2aogis7a
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