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Classification of EEG abnormalities in partial epilepsy with simultaneous EEG–fMRI recordings

C. Pedreira, A.E. Vaudano, R.C. Thornton, U.J. Chaudhary, S. Vulliemoz, H. Laufs, R. Rodionov, D.W. Carmichael, S.D. Lhatoo, M. Guye, R. Quian Quiroga, L. Lemieux
2014 NeuroImage  
(EEG-fMRI) recordings in 8 patients affected by refractory partial epilepsy candidate for surgery.  ...  Scalp EEG recordings and the classification of interictal epileptiform discharges (IED) in patients with epilepsy provide valuable information about the epileptogenic network, particularly by defining  ...  This work was undertaken in part at UCLH/UCL who received a proportion of the funding from the Department of Health's NIHR Biomedical Research Centres' funding scheme.  ... 
doi:10.1016/j.neuroimage.2014.05.009 pmid:24830841 fatcat:o3gmghgzxfb3pjsjnoqhupzt6q

Localization of Epileptic Foci Based on Simultaneous EEG-fMRI Data

Seyyed Mostafa Sadjadi, Elias Ebrahimzadeh, Mohammad Shams, Masoud Seraji, Hamid Soltanian-Zadeh
2021 Frontiers in Neurology  
One of the applications of EEG and fMRI combination as a valuable clinical approach is the pre-surgical evaluation of patients with epilepsy to map and localize the precise brain regions associated with  ...  This review examines the methodologies involved in performing such studies, including techniques used for the recording of EEG inside the scanner, artifact removal, and statistical analysis of the fMRI  ...  ACKNOWLEDGMENTS The authors thank the publishers for providing permission to use some of their published illustrations.  ... 
doi:10.3389/fneur.2021.645594 pmid:33986718 pmcid:PMC8110922 fatcat:c6vtg7tipre47ezhi7j6puouc4

Networks involved in seizure initiation: A reading epilepsy case studied with EEG-fMRI and MEG

A. E. Vaudano, D. W. Carmichael, A. Salek-Haddadi, S. Rampp, H. Stefan, L. Lemieux, M. J. Koepp
2012 Neurology  
We analyzed ictal magnetoencephalography (MEG) and EEG-correlated fMRI (EEG-fMRI) data in a unique patient with reading epilepsy (RE) affected by frequent perioral reflex myocloni triggered by reading  ...  Ictal MEG corroborated EEG localization and revealed activity extending precentrally into Brodmann area (BA) 6. fMRI blood oxygen level-dependent (BOLD) signal changes in the left deep piriform cortex  ...  During 2 fMRI sessions, a total of 243 ORMs were recorded; the simultaneous ictal EEG pattern showed brief (Ͻ1 second) diffuse spike-wave activity with the maximum frontally (figure2).  ... 
doi:10.1212/wnl.0b013e31825fdf3a pmid:22764255 pmcid:PMC3398433 fatcat:cxjrvld3rneylksscksqvgxvdy

fMRI of Epilepsy [chapter]

Karsten Krakow
2006 Functional MRI  
The first ictal fMRI with simultaneous EEG recording was reported by Salek-Haddadi and colleagues. 113 A patient with partial and generalized tonic-clonic seizures showed ictal EEG changes (rhythmic  ...  (A) Result of a continuous and simultaneous EEG/FMRI experiment in a patient with partial seizures due to a right tempro-parietal malformation of cortical development and frequent right temporal spikes  ... 
doi:10.1007/0-387-34665-1_12 fatcat:we2ziuzrb5eo3pwv32xokh6toi

Imaging foci of epileptic discharges from simultaneous EEG and fMRI using the canonical HRF

Cheng Luo, Zhiping Yao, Qifu Li, Xu Lei, Dong Zhou, Yun Qin, Yang Xia, Yongxiu Lai, Qiyong Gong, Dezhong Yao
2010 Epilepsy Research  
in EEG-fMRI study.  ...  Simultaneous electroencephalography and functional magnetic resonance imaging (EEG-fMRI) is considered as a powerful and non-invasive method that allows definition of the irritative zone.  ...  This study was also sponsored by the program of International Cooperation and Exchange of National Natural Science Foundation of China (No. 30811120424).  ... 
doi:10.1016/j.eplepsyres.2010.07.003 pmid:20674274 fatcat:6cnuyo5ztjh3dffkkxzi5piazq

The Role of Functional Neuroimaging in Pre-Surgical Epilepsy Evaluation

Francesca Pittau, Frédéric Grouiller, Laurent Spinelli, Margitta Seeck, Christoph M. Michel, Serge Vulliemoz
2014 Frontiers in Neurology  
In the last years, non-invasive neuroimaging techniques, such as simultaneous recording of functional magnetic resonance imaging and electroencephalogram (EEG-fMRI), positron emission tomography (PET),  ...  In an eligible subset of patients with drug-resistant epilepsy, surgical resection of the epileptogenic zone is the only treatment that can possibly cure the disease.  ...  Studies with large cohorts revealed that no significant spikerelated BOLD changes are observed in 40-70% of the EEG-fMRI recordings in patients with focal epilepsy (129, 130) .  ... 
doi:10.3389/fneur.2014.00031 pmid:24715886 pmcid:PMC3970017 fatcat:vhvfwtphvbfh5jtxp7hbghsewy

Using network dynamic fMRI for detection of epileptogenic foci

Sanja Nedic, Steven M. Stufflebeam, Carlo Rondinoni, Tonicarlo R. Velasco, Antonio C. dos Santos, Joao P. Leite, Ana C. Gargaro, Lilianne R. Mujica-Parodi, Jaime S. Ide
2015 BMC Neurology  
Disruptions in connectivity of the region exhibiting abnormal dynamics were examined in relation to duration of epilepsy and patients' cognitive performance using a delayed verbal memory recall task.  ...  Methods: In order to first validate this hypothesis on a cohort of patients with known ground truth, here we test individuals with well-defined epileptogenic foci (left mesial temporal lobe epilepsy).  ...  Multimodal studies, especially those utilizing simultaneous EEG-fMRI recordings, increasingly have been used to provide complementary information in presurgical work-up.  ... 
doi:10.1186/s12883-015-0514-y pmid:26689596 pmcid:PMC4687299 fatcat:gufgqahegbgh7akiteg5ciker4

Network Connectivity in Epilepsy: Resting State fMRI and EEG–fMRI Contributions

Maria Centeno, David W. Carmichael
2014 Frontiers in Neurology  
EEG-fMRI has frequently shown networks related to epileptic transients that in many cases are concordant with the abnormalities shown in RS studies.  ...  In patients with epilepsy, network connectivity derived from RS-fMRI has found connectivity abnormalities in a number of networks; these include the epileptogenic, cognitive and sensory processing networks  ...  This work was supported by the National Institute of Health Research Great Ormond Street Hospital Biomedical Research Centre. This review was stimulated by discussion in a workshop organized by Prof.  ... 
doi:10.3389/fneur.2014.00093 pmid:25071695 pmcid:PMC4081640 fatcat:prgqxtbdnrdttmf5moyqkw4ela

Localizing Epileptic Foci Using Simultaneous EEG-fMRI Recording: Template Component Cross-Correlation

Elias Ebrahimzadeh, Mohammad Shams, Masoud Seraji, Seyyed Mostafa Sadjadi, Lila Rajabion, Hamid Soltanian-Zadeh
2021 Frontiers in Neurology  
To evaluate the contribution of EEG-fMRI and concordance between fMRI and EEG, this method was applied on the data of 30 patients with refractory epilepsy.  ...  Conventional EEG-fMRI methods have been proven to be of limited use in the sense that they cannot reveal the information existing in between the spikes.  ...  ACKNOWLEDGMENTS The EEG-fMRI data used in this study were acquired in the National Brain Mapping Laboratory (NBML), Tehran, Iran. The authors would like to show their gratitude to Dr.  ... 
doi:10.3389/fneur.2021.695997 pmid:34867704 pmcid:PMC8634837 fatcat:bgf5djmcu5aktajck4chjnaw6q

The Role of EEG-fMRI in Studying Cognitive Network Alterations in Epilepsy

Elhum A. Shamshiri, Laurent Sheybani, Serge Vulliemoz
2019 Frontiers in Neurology  
Simultaneous EEG-fMRI can help explore the hemodynamic changes associated with focal or generalized epileptic discharges, thus providing information about both transient and non-transient impairment of  ...  In the following review, we discuss the importance of interictal discharges and their impact on cognition in different epilepsy syndromes.  ...  EEG-fMRI The simultaneous recording of EEG and fMRI allows for data acquisition with high spatio-temporal resolution, thereby making it possible to map hemodynamic changes related to interictal epileptic  ... 
doi:10.3389/fneur.2019.01033 pmid:31608007 pmcid:PMC6771300 fatcat:ickywykfozaghlsrp7vnkndmzm

Diagnostic techniques to detect the epileptogenic zone: Pathophysiological and presurgical analysis of epilepsy in dogs and cats

Daisuke Hasegawa
2016 The Veterinary Journal  
Coincident with these technological advances, there is an increased expectation to treat drug resistant epilepsy in dogs and cats by epilepsy surgery.  ...  These diagnostic techniques are essential for selecting both appropriate patients and surgical techniques, and are also important in understanding the pathophysiology of epilepsy.  ...  Video-EEG monitoring is a simultaneous recording of patient's physical behaviour during an EEG.  ... 
doi:10.1016/j.tvjl.2016.03.005 pmid:27052436 fatcat:pcnxcjkfrnfg3c4ua34c2u4hry

A prospective fMRI-based technique for localising the epileptogenic zone in presurgical evaluation of epilepsy

Borbála Hunyadi, Simon Tousseyn, Patrick Dupont, Sabine Van Huffel, Maarten De Vos, Wim Van Paesschen
2015 NeuroImage  
., "A prospective fMRI-based technique for localising the epileptogenic zone in presurgical evaluation of epilepsy Abstract There is growing evidence for the benefits of simultaneous EEG-fMRI as a non-invasive  ...  localising tool in the presurgical evaluation of epilepsy.  ...  visible on the simultaneously recorded EEG.  ... 
doi:10.1016/j.neuroimage.2015.03.011 pmid:25776215 fatcat:uqahgjmqyvbspiy6rwsphhno6i

The combination of EEG Source Imaging and EEG-correlated functional MRI to map epileptic networks

Serge Vulliemoz, Louis Lemieux, Jean Daunizeau, Christoph M. Michel, John S. Duncan
2010 Epilepsia  
Functional electrophysiologic techniques such as electroencephalography (EEG) and magnetoencephalography (MEG) give insights into the dynamics of the networks involved in the generation of interictal and  ...  With recent advances in methodology and clinical validation, EEG source imaging (ESI) may now be used to map epileptic activity as well as evoked responses to external stimuli.  ...  We confirm that we have read the Journal's position on issues involved in ethical publication and affirm that this report is consistent with those guidelines.  ... 
doi:10.1111/j.1528-1167.2009.02342.x pmid:19817805 fatcat:wkzeojfr5fge5drheubnqxoiiu

Epileptic Neuronal Networks: Methods of Identification and Clinical Relevance

Hermann Stefan, Fernando H. Lopes da Silva
2013 Frontiers in Neurology  
Linear and non-linear methodologies aiming at characterizing the dynamics of neuronal networks applied to EEG/MEG and combined EEG/fMRI signals in epilepsy are critically reviewed.  ...  In the light of the concepts of epileptic neuronal networks, and recent experimental findings, the dichotomic classification in focal and generalized epilepsy is re-evaluated.  ...  A typical example is the study of Vaudano et al. (2012) who made ictal MEG and EEG-fMRI recordings in a patient with reading epilepsy.  ... 
doi:10.3389/fneur.2013.00008 pmid:23532203 pmcid:PMC3607195 fatcat:7wqy2iqc2zh75blj6b2xk7fkra

Mapping Epileptic Activity: Sources or Networks for the Clinicians?

Francesca Pittau, Pierre Mégevand, Laurent Sheybani, Eugenio Abela, Frédéric Grouiller, Laurent Spinelli, Christoph M. Michel, Margitta Seeck, Serge Vulliemoz
2014 Frontiers in Neurology  
This is a key concept for semiological electroclinical correlations, localization of relevant structural lesions, and selection of patients for epilepsy surgery.  ...  of both techniques to optimize spatial and temporal resolution with whole-brain coverage and directional connectivity.  ...  fMRI and EEG-fMRI studies in focal epilepsy Unfortunately, only few of the many studies on RS-FC have been done with the simultaneous recording of EEG.  ... 
doi:10.3389/fneur.2014.00218 pmid:25414692 pmcid:PMC4220689 fatcat:onsc67xnxnd6vhuvh6lmcjgsha
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