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Neuroimaging in Epilepsy

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Network reorganisation following anterior temporal lobe resection and relation with post-surgery seizure relapse: A longitudinal study.

Nádia Moreira da Silva, Rob Forsyth, Andrew McEvoy, Anna Miserocchi, Jane de Tisi, Sjoerd B Vos, Gavin P Winston, John Duncan, Yujiang Wang, Peter N Taylor,

OBJECTIVE:To characterise temporal lobe epilepsy (TLE) surgery-induced changes in brain network properties, as measured using diffusion weighted MRI, and investigate their association with postoperative seizure-freedom. METHODS:For 48 patients who underwent anterior temporal lobe resection, diffusion weighted MRI was acquired pre-operatively, 3-4 months post-operatively (N = 48), and again 12 months post-operatively (N = 13). Data for ... Read more >>

Neuroimage Clin (NeuroImage. Clinical)
[2020, 27:102320]

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Diagnostic gap in genetic epilepsies: A matter of age.

Angel Aledo-Serrano, Irene García-Morales, Rafael Toledano, Adolfo Jiménez-Huete, Beatriz Parejo, Carla Anciones, Ana Mingorance, Primitivo Ramos, Antonio Gil-Nagel,

OBJECTIVE:This study aimed to evaluate the access to advanced diagnostic tests in patients with epilepsy and intellectual disability, with special focus on genetics. METHODS:Patients with epilepsy and intellectual disability evaluated between 2016 and 2018 at the Epilepsy Unit of two hospitals in Madrid, Spain were included. The main inclusion criterion ... Read more >>

Epilepsy Behav (Epilepsy & behavior : E&B)
[2020, 111:107266]

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Epilepsia Open-June 2020-Announcements.

Epilepsia Open (Epilepsia Open)
[2020, 5(2):325-328]

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Intracranial Recordings Reveal Unique Shape and Timing of Responses in Human Visual Cortex during Illusory Visual Events.

Maartje C de Jong, Mariska J Vansteensel, Raymond van Ee, Frans S S Leijten, Nick F Ramsey, H Chris Dijkerman, Serge O Dumoulin, Tomas Knapen,

During binocular rivalry, perception spontaneously changes without any alteration to the visual stimulus. What neural events bring about this illusion that a constant stimulus is changing? We recorded from intracranial electrodes placed on the occipital and posterior temporal cortex of two patients with epilepsy while they experienced illusory changes of ... Read more >>

Curr. Biol. (Current biology : CB)
[2020, :]

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Classics in Neuroimaging: Development of Positron Emission Tomography Tracers for Imaging the GABAergic Pathway.

Emily Murrell, Jonathan M Pham, Alexandra R Sowa, Allen F Brooks, Michael R Kilbourn, Peter J H Scott, Neil Vasdev,

Advances in drug discovery and diverse radiochemical methodologies have led to the discovery of novel positron emission tomography (PET) radiotracers used to image the GABAergic system, shaping our fundamental understanding of a variety of brain health illnesses, including epilepsy, stroke, cerebral palsy, schizophrenia, autism, Alzheimer's disease, and addictions. In this ... Read more >>

ACS Chem Neurosci (ACS chemical neuroscience)
[2020, :]

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Mapping language from MEG beta power modulations during auditory and visual naming.

Vahab Youssofzadeh, Jeffrey Stout, Candida Ustine, William L Gross, Lisa L Conant, Colin J Humphries, Jeffrey R Binder, Manoj Raghavan,

Evaluation of language dominance is an essential step prior to epilepsy surgery. There is no consensus on an optimal methodology for determining language dominance using magnetoencephalography (MEG). Oscillatory dynamics are increasingly recognized as being of fundamental importance for brain function and dysfunction. Using task-related beta power modulations in MEG, we ... Read more >>

Neuroimage (NeuroImage)
[2020, 220:117090]

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Dynamical mechanisms of interictal resting-state functional connectivity in epilepsy.

Julie Courtiol, Maxime Guye, Fabrice Bartolomei, Spase Petkoski, Viktor K Jirsa,

Drug-resistant focal epilepsy is a large-scale brain networks disorder characterized by altered spatiotemporal patterns of functional connectivity (FC), even during interictal resting-state (RS). Although RS-FC-based metrics can detect these changes, results from RS functional magnetic resonance imaging (RS-fMRI) studies are unclear and difficult to interpret, and the underlying dynamical mechanisms ... Read more >>

J. Neurosci. (The Journal of neuroscience : the official journal of the Society for Neuroscience)
[2020, :]

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Brain TRODAT-SPECT Versus MRI Morphometry in Distinguishing Early Mild Parkinson's Disease from Other Extrapyramidal Syndromes.

Mohammad Reza Hossein-Tehrani, Tahereh Ghaedian, Etrat Hooshmandi, Leila Kalhor, Amin Abolhasani Foroughi, Vahid Reza Ostovan,

BACKGROUND AND PURPOSE:The clinical differentiation of Parkinson's disease (PD) from other extrapyramidal syndromes has made a challenge in neurology. This study aimed to compare the specificity and sensitivity of brain MRI volumetry and dopamine transporter scans in differentiating PD from other extrapyramidal syndromes in the early stages of the disease. ... Read more >>

J Neuroimaging (Journal of neuroimaging : official journal of the American Society of Neuroimaging)
[2020, :]

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Volumetric and Functional Activity Lateralization in Healthy Subjects and Patients with Focal Epilepsy: Initial Findings in a 7T MRI Study.

Lisanne P W Canjels, Walter H Backes, Tamar M van Veenendaal, Marielle C G Vlooswijk, Paul A M Hofman, Albert P Aldenkamp, Rob P W Rouhl, Jacobus F A Jansen,

BACKGROUND AND PURPOSE:In 30% of the patients with focal epilepsy, an epileptogenic lesion cannot be visually detected with structural MRI. Ultra-high field MRI may be able to identify subtle pathology related to the epileptic focus. We set out to assess 7T MRI-derived volumetric and functional activity lateralization of the hippocampus, ... Read more >>

J Neuroimaging (Journal of neuroimaging : official journal of the American Society of Neuroimaging)
[2020, :]

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Cerebrocerebellar structural covariance in temporal lobe epilepsy with hippocampal sclerosis.

Václav Marcián, Radek Mareček, Martin Pail, Milan Brázdil,

PURPOSE:The purpose of the study was to evaluate cerebral morphological changes in temporal lobe epilepsy with hippocampal sclerosis (TLE-HS) and their relationship to the cerebellum. METHODS:The study cohort included 21 patients with intractable TLE-HS (14 left-sided, 7 right-sided) and 38 healthy controls (HC). All patients later underwent anteromedial temporal lobe ... Read more >>

Epilepsy Behav (Epilepsy & behavior : E&B)
[2020, 111:107180]

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Neuroimaging in tuberous sclerosis complex.

Camilla Russo, Anna Nastro, Domenico Cicala, Maria De Liso, Eugenio Maria Covelli, Giuseppe Cinalli,

INTRODUCTION:Tuberous sclerosis complex (TSC) is a rare autosomal dominant disorder affecting multiple systems, due to inactivating mutations of TSC1 or TSC2 mTOR pathway genes. Neurological manifestations are observed in about 95% cases, representing the most frequent cause of morbidity and one of the most common causes of mortality. BACKGROUND:Neuroimaging is ... Read more >>

Childs Nerv Syst (Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery)
[2020, :]

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Planning stereoelectroencephalography using automated lesion detection: Retrospective feasibility study.

Konrad Wagstyl, Sophie Adler, Birgit Pimpel, Aswin Chari, Kiran Seunarine, Sara Lorio, Rachel Thornton, Torsten Baldeweg, Martin Tisdall,

OBJECTIVE:This retrospective, cross-sectional study evaluated the feasibility and potential benefits of incorporating deep-learning on structural magnetic resonance imaging (MRI) into planning stereoelectroencephalography (sEEG) implantation in pediatric patients with diagnostically complex drug-resistant epilepsy. This study aimed to assess the degree of colocalization between automated lesion detection and the seizure onset zone ... Read more >>

Epilepsia (Epilepsia)
[2020, :]

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Cingulate cortex function and multi-modal connectivity mapped using intracranial stimulation.

Irina Oane, Andrei Barborica, Filip Chetan, Cristian Donos, Mihai Dragos Maliia, Anca Adriana Arbune, Andrei Daneasa, Constantin Pistol, Adriana Elena Nica, Ovidiu Alexandru Bajenaru, Ioana Mindruta,

The cingulate cortex is part of the limbic system. Its function and connectivity are organized in a rostro-caudal and ventral-dorsal manner which was addressed by various other studies using rather coarse cortical parcellations. In this study, we aim at describing its function and connectivity using invasive recordings from patients explored ... Read more >>

Neuroimage (NeuroImage)
[2020, 220:117059]

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Frequency of menstrual abnormalities and their associated neuroimaging findings in women with focal refractory epilepsy.

Mahta Ranjbar, Jafar Mehvari Habibabadi, Farinaz Poorazarian, Banafshe Mohammadi, Seyed Navid Naghibi, Nasim Tabrizi,

Patients with refractory epilepsy can suffer from psychological and physical problems. Epilepsy can also be associated with menstruation abnormalities in women. In this paper, we aim to survey women with focal refractory epilepsy who also suffer from menstrual abnormalities. This cross-sectional study was performed in 2018 in Tertiary Epilepsy Center ... Read more >>

Acta Neurol Belg (Acta neurologica Belgica)
[2020, :]

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Seizures in Children.

Anthony Fine, Elaine C Wirrell,

Epilepsy is one of the most common neurologic disorders seen in children, with the highest incidence in the first year of life. Diagnostic accuracy can be challenging because many seizure mimics must be considered. Electroencephalography and neuroimaging can be critical in determining etiology and syndrome. Genetic testing is a high-yield ... Read more >>

Pediatr Rev (Pediatrics in review)
[2020, 41(7):321-347]

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Hippocampal stiffness in mesial temporal lobe epilepsy measured with MR elastography: Preliminary comparison with healthy participants.

Graham R Huesmann, Hillary Schwarb, Daniel R Smith, Ryan T Pohlig, Aaron T Anderson, Matthew D J McGarry, Keith D Paulsen, Tracey Mencio Wszalek, Bradley P Sutton, Curtis L Johnson,

Mesial temporal lobe epilepsy (MTLE) is the most common form of refractory epilepsy. Common imaging biomarkers are often not sensitive enough to identify MTLE sufficiently early to facilitate the greatest benefit from surgical or pharmacological intervention. The objective of this work is to establish hippocampal stiffness measured with magnetic resonance ... Read more >>

Neuroimage Clin (NeuroImage. Clinical)
[2020, 27:102313]

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Functional connectome contractions in temporal lobe epilepsy: Microstructural underpinnings and predictors of surgical outcome.

Sara Larivière, Yifei Weng, Reinder Vos de Wael, Jessica Royer, Birgit Frauscher, Zhengge Wang, Andrea Bernasconi, Neda Bernasconi, Dewi V Schrader, Zhiqiang Zhang, Boris C Bernhardt,

OBJECTIVE:Temporal lobe epilepsy (TLE) is the most common drug-resistant epilepsy in adults. Although it is commonly related to hippocampal pathology, increasing evidence suggests structural changes beyond the mesiotemporal lobe. Functional anomalies and their link to underlying structural alterations, however, remain incompletely understood. METHODS:We studied 30 drug-resistant TLE patients and 57 ... Read more >>

Epilepsia (Epilepsia)
[2020, 61(6):1221-1233]

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Alterations in Functional Connectivity During Different Phases of the Triggered Migraine Attack.

Nazia Karsan, Pyari R Bose, Owen O'Daly, Fernando O Zelaya, Peter J Goadsby,

OBJECTIVE:To understand the changes in functional connectivity between brain areas of potential importance in migraine during different phases of the attack. BACKGROUND:Migraine is a symptomatically heterogeneous disorder. Understanding the possible changes in brain function and, therefore, neurobiology during different phases of the migraine attack is important in developing disease biomarkers ... Read more >>

Headache (Headache)
[2020, :]

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Machine-learning-based diagnostics of EEG pathology.

Lukas A W Gemein, Robin T Schirrmeister, Patryk Chrabąszcz, Daniel Wilson, Joschka Boedecker, Andreas Schulze-Bonhage, Frank Hutter, Tonio Ball,

Machine learning (ML) methods have the potential to automate clinical EEG analysis. They can be categorized into feature-based (with handcrafted features), and end-to-end approaches (with learned features). Previous studies on EEG pathology decoding have typically analyzed a limited number of features, decoders, or both. For a I) more elaborate feature-based ... Read more >>

Neuroimage (NeuroImage)
[2020, 220:117021]

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MEG for Greater Sensitivity and More Precise Localization in Epilepsy.

Richard C Burgess,

Magnetoencephalography is the noninvasive measurement of miniscule magnetic fields produced by brain electrical currents, and is used most fruitfully to evaluate epilepsy patients. While other modalities infer brain function indirectly by measuring changes in blood flow, metabolism, and oxygenation, magnetoencephalography measures neuronal and synaptic function directly with submillisecond temporal resolution. ... Read more >>

Neuroimaging Clin. N. Am. (Neuroimaging clinics of North America)
[2020, 30(2):145-158]

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EEG Source Imaging (ESI) utility in clinical practice.

Pegah Khosropanah, Eric Tatt-Wei Ho, Kheng-Seang Lim, Si-Lei Fong, Minh-An Thuy Le, Vairavan Narayanan,

Epilepsy surgery is an important treatment modality for medically refractory focal epilepsy. The outcome of surgery usually depends on the localization accuracy of the epileptogenic zone (EZ) during pre-surgical evaluation. Good localization can be achieved with various electrophysiological and neuroimaging approaches. However, each approach has its own merits and limitations. ... Read more >>

Biomed Tech (Berl) (Biomedizinische Technik. Biomedical engineering)
[2020, :]

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Epilepsy Lesion Localization is not Predicted by Developmental Venous Anomaly Location or its FDG-PET Metabolic Activity.

Jillian W Lazor, Joel M Stein, James Eric Schmitt, Kathryn A Davis, Seyed Ali Nabavizadeh,

BACKGROUND AND PURPOSE:This study's purpose is to correlate location and metabolic activity of developmental venous anomalies (DVAs) in epilepsy patients to the seizure focus as determined by ictal/interictal encephaloelectrogram (EEG). METHODS:A retrospective search was performed for epilepsy patients with DVAs who underwent brain 18 F-fluorodeoxyglucose positron emission tomography (18 F-FDG-PET) ... Read more >>

J Neuroimaging (Journal of neuroimaging : official journal of the American Society of Neuroimaging)
[2020, :]

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Continuous Electroencephalography (cEEG) Characteristics and Acute Symptomatic Seizures in COVID-19 Patients

Shreya Louis, Andrew Dhawan, Christopher Newey, Dileep Nair, Lara Jehi, Stephen Hantus, Vineet Punia,

Background: Neurological manifestations of COVID-19 have only recently been described, with a paucity of literature reporting the potential relationship between COVID-19 and acute symptomatic seizures. Two prior studies found no clinical or electrographic seizures in their cohorts of COVID-19 patients with altered mental status (AMS) and clinical seizure-like events (SLEs). ... Read more >>

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Temporal-plus epilepsy in children: A connectomic analysis in magnetoencephalography.

Daniel J Martire, Simeon Wong, Adriana Workewych, Elizabeth Pang, Sarah Boutros, Mary Lou Smith, Ayako Ochi, Hiroshi Otsubo, Roy Sharma, Elysa Widjaja, O Carter Snead, Elizabeth Donner, George M Ibrahim,

OBJECTIVE:Seizure recurrence following surgery for temporal lobe (TL) epilepsy may be related to extratemporal epileptogenic foci, so-called temporal-plus (TL+) epilepsy. Here, we sought to leverage whole brain connectomic profiling in magnetoencephalography (MEG) to identify neural networks indicative of TL+ epilepsy in children. METHODS:Clinical and MEG data were analyzed for 121 ... Read more >>

Epilepsia (Epilepsia)
[2020, :]

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Hyperostosis frontalis interna diagnosed after a provoked seizure.

Gabriel Torrealba-Acosta, Jacob Mandel,

BMJ Case Rep (BMJ case reports)
[2020, 13(7):]

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