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frontal epilepsy

Xinyue Zhang, Lichao Sun, Li Cui, Weihong Lin
Background Sudden unexpected death in epilepsy (SUDEP) is the most common cause of death in people with epilepsy. The pathogenesis of SUDEP is still unclear. The majority of SUDEP cases occur in intractable epilepsy, especially in the aftermath of a generalized tonic-clonic seizure. We report an atypical SUDEP case with infrequent seizures in frontal lobe epilepsy. Case Report A 14-year-old girl presented with a 13-year history of paroxysmal convulsions. She experienced three episodes within 6-10 months after birth...
January 1, 2018: Journal of International Medical Research
Laurent Sheybani, Gwenaël Birot, Alessandro Contestabile, Margitta Seeck, Jozsef Zoltan Kiss, Karl Schaller, Christoph M Michel, Charles Quairiaux
Most research on focal epilepsy focuses on mechanisms of seizure generation in the primary epileptic focus (EF). However, neurological deficits that are not directly linked to seizure activity and that may persist after focus removal are frequent. The recruitment of remote brain regions of an epileptic network (EN) is recognized as a possible cause, but a profound lack of experimental evidence exists concerning their recruitment and the type of pathological activities they exhibit.We studied the development of epileptic activities at the large-scale in male mice of the kainate model of unilateral temporal lobe epilepsy using high-density surface EEG and multiple-site intracortical recordings...
March 19, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Gopal Krishna Dash, Chaturbhuj Rathore, Malcolm K Jeyaraj, Pandurang Wattamwar, Sankara P Sarma, Kurupath Radhakrishnan
OBJECTIVE: Interictal regional paroxysmal fast activity (RPFA) on scalp EEG is common in patients with focal cortical dysplasia (FCD). Little data exists regarding the presence of RPFA in other etiologies. METHODS: We studied the association between RPFA and etiology on MRI in patients with drug resistant focal epilepsy undergoing presurgical evaluation in 2011. RPFA was defined as ≥3 consecutive spikes with a frequency of ≥10 Hz lasting ≥300 ms but <4 s...
February 27, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
Louis Ross, Ahsan M Naduvil, Juan C Bulacio, Imad M Najm, Jorge A Gonzalez-Martinez
BACKGROUND: Laser ablation surgery has had encouraging results in the treatment of multiple intracranial diseases including primary and metastatic brain tumors, radiation necrosis, and epilepsy. The use of the stereoelectroencephalography (SEEG) method in combination with laser thermocoagulation therapy with the goal of modulating epileptic networks in patients with neocortical nonlesional phamacoresistant epilepsy has not been previously described. OBJECTIVE: To describe the novel methodological and conceptual aspects related to SEEG-guided laser ablations in patients with magnetic resonance imaging (MRI)-negative pharmacoresistant neocortical focal epilepsy...
March 14, 2018: Operative Neurosurgery (Hagerstown, Md.)
Xiaosong He, Danielle S Bassett, Ganne Chaitanya, Michael R Sperling, Lauren Kozlowski, Joseph I Tracy
Temporal lobe epilepsy tends to reshape the language system causing maladaptive reorganization that can be characterized by task-based functional MRI, and eventually can contribute to surgical decision making processes. However, the dynamic interacting nature of the brain as a complex system is often neglected, with many studies treating the language system as a static monolithic structure. Here, we demonstrate that as a specialized and integrated system, the language network is inherently dynamic, characterized by rich patterns of regional interactions, whose transient dynamics are disrupted in patients with temporal lobe epilepsy...
March 15, 2018: Brain: a Journal of Neurology
Brin Freund, James J Gugger, Alexandra Reynolds, William O Tatum, Jan Claassen, Peter W Kaplan
PURPOSE: Periodic discharges (PDs) are EEG patterns denoting brain dysfunction and ictal tendency. Their exact meaning regarding etiology and outcomes is not well known. In particular, bilateral independent PDs (BIPDs) are poorly described. METHODS: We performed a retrospective, multicenter study evaluating neuroimaging, epileptic, clinical, and EEG correlates of BIPDs. RESULTS: Twenty-five patients studied with a mean Glasgow Coma Scale 6...
March 15, 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
Bo Jin, Wenhan Hu, Linmei Ye, Balu Krishnan, Thandar Aung, Stephen E Jones, Imad M Najm, Andreas V Alexopoulos, Kai Zhang, Junming Zhu, Jianguo Zhang, Meiping Ding, Zhong Chen, Shuang Wang, Zhong Irene Wang
Objective: To investigate the neuroimaging and clinical features associated with sleep-related epilepsy (SRE) in patients with focal cortical dysplasia (FCD) type II. Methods: Patients with histopathologically proven FCD type II were included from three epilepsy centers. SRE was defined according to the video EEG findings and seizure history. Cortical surface reconstruction and volume calculation were performed using FreeSurfer. The lesions were manually delineated on T1 volumetric MRI using the ITK-SNAP software...
2018: Frontiers in Neurology
Elias Oulasvirta, Päivi Koroknay-Pál, Ahmad Hafez, Ahmed Abou Elseoud, Hanna Lehto, Aki Laakso
BACKGROUND: Population-based long-term data on pediatric patients with cerebral arteriovenous malformations (AVMs) are limited. OBJECTIVE: To clarify the characteristics and long-term outcome of pediatric patients with AVM. METHODS: A retrospective analysis was performed on 805 consecutive brain AVM patients admitted to a single center between 1942 and 2014. The patients were defined as children if they were under 18 yr at admission. Children were compared to an adult cohort...
March 5, 2018: Neurosurgery
Birgit Frauscher, Nicolas von Ellenrieder, Rina Zelmann, Irena Doležalová, Lorella Minotti, André Olivier, Jeffery Hall, Dominique Hoffmann, Dang Khoa Nguyen, Philippe Kahane, François Dubeau, Jean Gotman
In contrast to scalp EEG, our knowledge of the normal physiological intracranial EEG activity is scarce. This multicentre study provides an atlas of normal intracranial EEG of the human brain during wakefulness. Here we present the results of power spectra analysis during wakefulness. Intracranial electrodes are placed in or on the brain of epilepsy patients when candidates for surgical treatment and non-invasive approaches failed to sufficiently localize the epileptic focus. Electrode contacts are usually in cortical regions showing epileptic activity, but some are placed in normal regions, at distance from the epileptogenic zone or lesion...
March 1, 2018: Brain: a Journal of Neurology
Noah Sideman, Ganne Chaitanya, Xiaosong He, Gaelle Doucet, Na Young Kim, Michael R Sperling, Ashwini D Sharan, Joseph I Tracy
OBJECTIVE: In epilepsy, asymmetries in the organization of mesial temporal lobe (MTL) functions help determine the cognitive risk associated with procedures such as anterior temporal lobectomy. Past studies have investigated the change/shift in a visual episodic memory laterality index (LI) in mesial temporal lobe structures through functional magnetic resonance imaging (fMRI) task activations. Here, we examine whether underlying task-related functional connectivity (FC) is concordant with such standard fMRI laterality measures...
February 27, 2018: Epilepsy & Behavior: E&B
Mads Svart, Lars C Gormsen, Jakob Hansen, Dora Zeidler, Michael Gejl, Kim Vang, Joel Aanerud, Niels Moeller
Ketone bodies are neuroprotective in neurological disorders such as epilepsy. We randomly studied nine healthy human subjects twice-with and without continuous infusion of 3-hydroxybutyrate-to define potential underlying mechanisms, assessed regionally (parietal, occipital, temporal, cortical grey, and frontal) by PET scan. During 3-hydroxybutyrate infusions concentrations increased to 5.5±0.4 mmol/l and cerebral glucose utilisation decreased 14%, oxygen consumption remained unchanged, and cerebral blood flow increased 30%...
2018: PloS One
Shanika R Samarasekera, Samuel F Berkovic, Ingrid E Scheffer
The aim of this study was to evaluate the efficacy and tolerability of open-label lacosamide in patients with refractory sleep-related hypermotor epilepsy. The study was a case review of eight patients with refractory sleep-related hypermotor epilepsy treated with lacosamide. Seizure diaries compared the mean baseline seizure frequency with the most recent 3 months of follow-up. Five (62.5%) patients were responders, defined as ≥50% reduction in seizure frequency, over a mean duration of exposure of 21.5 months...
February 25, 2018: Journal of Sleep Research
Daniel San-Juan, Carlos Ignacio Sarmiento, Katia Márquez González, José Manuel Orenday Barraza
Transcranial direct current stimulation (tDCS) is a reemerged noninvasive cerebral therapy used to treat patients with epilepsy, including focal cortical dysplasia, with controversial results. We present a case of a 28-year-old female with left frontal cortical dysplasia refractory to antiepileptic drugs, characterized by 10-15 daily right tonic hemi-body seizures. The patient received a total of seven sessions of cathodal tDCS (2 mA, 30 min). The first three sessions were applied over three consecutive days, and the remaining four sessions of tDCS were given each at 2-week intervals...
2018: Frontiers in Neurology
Phillip L Pearl, Annapurna Poduri, Sanjay P Prabhu, Chellamani Harini, Richard Goldstein, Richard M Atkinson, Dawna Armstrong, Hannah Kinney
The histopathology, "white matter spongiosis," defined by electron microscopy (EM) as "intramyelinic edema," has been associated with vigabatrin therapy in various animal models, but its role or significance in clinical studies is unknown. We conducted a neuropathological examination on a 27-month-old boy with bilateral polymicrogyria and epilepsy after sudden unexpected death in epilepsy (SUDEP). The patient was initiated on vigabatrin at 4 months of age, which controlled infantile spasms, and was continued as maintenance therapy...
February 23, 2018: Epilepsia
Martin Völker, Lukas D J Fiederer, Sofie Berberich, Jiří Hammer, Joos Behncke, Pavel Kršek, Martin Tomášek, Petr Marusič, Peter C Reinacher, Volker A Coenen, Moritz Helias, Andreas Schulze-Bonhage, Wolfram Burgard, Tonio Ball
Error detection in motor behavior is a fundamental cognitive function heavily relying on cortical information processing. Neural activity in the high-gamma frequency band (HGB) closely reflects such local cortical processing, but little is known about its role in error processing, particularly in the healthy human brain. Here we characterize the error-related response of the human brain based on data obtained with noninvasive EEG optimized for HGB mapping in 31 healthy subjects (15 females, 16 males), and additional intracranial EEG data from 9 epilepsy patients (4 females, 5 males)...
February 19, 2018: NeuroImage
Lin Jiang, Tijiang Zhang, Fajin Lv, Shiguang Li, Heng Liu, Zhiwei Zhang, Tianyou Luo
Benign childhood epilepsy with centrotemporal spikes (BECTS) is associated with cognitive and language problems. According to recent studies, disruptions in brain structure and function in children with BECTS are beyond a Rolandic focus, suggesting atypical cortical development. However, previous studies utilizing surface-based metrics (e.g., cortical gyrification) and their structural covariance networks at high resolution in children with BECTS are limited. Twenty-six children with BECTS (15 males/11 females; 10...
2018: Frontiers in Neurology
Ravindra Arya, J Adam Wilson, Hisako Fujiwara, Jennifer Vannest, Anna W Byars, Leonid Rozhkov, James L Leach, Hansel M Greiner, Jason Buroker, Craig Scholle, Paul S Horn, Nathan E Crone, Douglas F Rose, Francesco T Mangano, Katherine D Holland
OBJECTIVE: This prospective study compared the topography of high-gamma modulation (HGM) during a story-listening task requiring negligible patient cooperation, with the conventional electrical stimulation mapping (ESM) using a picture-naming task, for presurgical language localization in pediatric drug-resistant epilepsy. METHODS: Patients undergoing extraoperative monitoring with subdural electrodes were included. Electrocorticographic signals were recorded during quiet baseline and a story-listening task...
February 20, 2018: Epilepsia
Katrin Walther, Müjgan Dogan Onugoren, Michael Buchfelder, Stephanie Gollwitzer, Wolfgang Graf, Burkhard S Kasper, Peter Kriwy, Katrin Kurzbuch, Johannes Lang, Karl Rössler, Stefan Schwab, Michael Schwarz, Hermann Stefan, Hajo M Hamer
OBJECTIVE: Only limited data exist on psychosocial long-term outcome after epilepsy surgery in patients with extratemporal epilepsy. The aim of this study was to investigate psychosocial outcome after extratemporal epilepsy surgery and to assess factors predicting favorable outcome. METHOD: Sixty-five out of 104 eligible patients who had undergone extratemporal epilepsy surgery at our epilepsy center between 1990 and 2015 (mean age: 42.2. years; 75% of the resections in the frontal lobe) completed a questionnaire asking about seizure status, employment status, marital and living situation, driving status, depressive symptoms, and quality of life (QOL)...
February 14, 2018: Epilepsy & Behavior: E&B
Hava Özlem Dede, Nerses Bebek, Candan Gürses, Leyla Baysal-Kıraç, Betül Baykan, Ayşen Gökyiğit
OBJECTIVES: Genital automatisms (GAs) are uncommon clinical phenomena of focal seizures. They are defined as repeated fondling, grabbing, or scratching of the genitals. The aim of this study was to determine the lateralizing and localizing value and associated clinical characteristics of GAs. METHODS: Three hundred thirteen consecutive patients with drug-resistant seizures who were referred to our tertiary center for presurgical evaluation between 2009 and 2016 were investigated...
February 1, 2018: Epilepsy & Behavior: E&B
A B Gago-Veiga, R Toledano, I García-Morales, M A Pérez-Jiménez, J Bernar, A Gil-Nagel
BACKGROUND: Ring chromosome 20 (R20) syndrome is a chromosomal disorder characterized mainly by drug-resistant frontal lobe seizures, recurrent nonconvulsive status epilepticus (NCSE), and typical EEG features. The aim of this study was to investigate if this triad is common and specific to all patients with R20. METHODS: In this cross-sectional study (from 2000 to 2011), we selected patients who fulfilled at least two out of three criteria: drug-resistant frontal lobe seizures, recurrent NCSE, and characteristic electroencephalography (EEG) features...
February 2, 2018: Epilepsy & Behavior: E&B
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