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Seizure epilepsy

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https://www.readbyqxmd.com/read/29667458/sudden-unexpected-death-in-epilepsy-ongoing-challenges-in-finding-mechanisms-and-prevention
#1
Doungporn Ruthirago, Parunyou Julayanont, Amputch Karukote, Mohamed Shehabeldin, Kenneth Nugent
Patients with epilepsy have a significantly higher risk of death than the general population. Sudden unexpected death in epilepsy (SUDEP) is the leading cause of sudden death among patients with epilepsy. Despite on-going research, there are still deficits in our knowledge about the mechanisms, genetic factors, and prevention of SUDEP. Current evidence suggests that cardiac arrhythmias, respiratory dysfunction, and brainstem arousal system dysfunction are the major mechanisms of SUDEP, and animal models support the role of neurotransmitters, especially serotonin and adenosine, in pathophysiology of SUDEP...
April 18, 2018: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29667129/elevation-of-mmp-9-levels-promotes-epileptogenesis-after-traumatic-brain-injury
#2
Barbara Pijet, Marzena Stefaniuk, Agnieszka Kostrzewska-Ksiezyk, Photini-Effie Tsilibary, Athina Tzinia, Leszek Kaczmarek
Posttraumatic epilepsy (PTE) is a recurrent seizure disorder that often develops secondary to traumatic brain injury (TBI) that is caused by an external mechanical force. Recent evidence shows that the brain extracellular matrix plays a major role in the remodeling of neuronal connections after injury. One of the proteases that is presumably responsible for this process is matrix metalloproteinase-9 (MMP-9). The levels of MMP-9 are elevated in rodent brain tissue and human blood samples after TBI. However, no studies have described the influence of MMP-9 on the development of PTE...
April 17, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29667074/on-the-optimal-z-score-threshold-for-siscom-analysis-to-localize-the-ictal-onset-zone
#3
Liesbeth De Coster, Koen Van Laere, Evy Cleeren, Kristof Baete, Patrick Dupont, Wim Van Paesschen, Karolien E Goffin
BACKGROUND: In epilepsy patients, SISCOM or subtraction ictal single photon emission computed tomography co-registered to magnetic resonance imaging has become a routinely used, non-invasive technique to localize the ictal onset zone (IOZ). Thresholding of clusters with a predefined number of standard deviations from normality (z-score) is generally accepted to localize the IOZ. In this study, we aimed to assess the robustness of this parameter in a group of patients with well-characterized drug-resistant epilepsy in whom the exact location of the IOZ was known after successful epilepsy surgery...
April 17, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29666958/ictal-interictal-continuum-patterns
#4
REVIEW
Gamaleldin M Osman, Davi F Araújo, Carolina B Maciel
PURPOSE OF REVIEW: To present data available on the epidemiology and significance of rhythmic and periodic patterns that lie on the ictal interictal continuum and propose an algorithm for the clinical approach to patients exhibiting these patterns. RECENT FINDINGS: There is accumulating evidence on the prognostic implications of various rhythmic and periodic patterns in the critically ill population. These patterns are not only associated with increased seizure risk but have also been associated with worse outcome and increased long-term risk of epilepsy in recent studies...
April 18, 2018: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/29666902/effect-of-cyp2c19-ugt1a8-and-ugt2b7-on-valproic-acid-clearance-in-children-with-epilepsy-a-population-pharmacokinetic-model
#5
Shenghui Mei, Weixing Feng, Leting Zhu, Xingang Li, Yazhen Yu, Weili Yang, Baoqin Gao, Xiaojuan Wu, Fang Fang, Zhigang Zhao
PURPOSE: Valproic acid (VPA) is an important drug in seizure control with great inter-individual differences in metabolism and treatment effect. This study aims to identify the effects of genetic variants on VPA clearance in a population pharmacokinetic (popPK) model in children with epilepsy. METHODS: A total of 325 VPA plasma concentrations from 290 children with epilepsy were used to develop the popPK model by using the nonlinear mixed-effects modeling method...
April 17, 2018: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29665725/epileptic-eeg-identification-via-lbp-operators-on-wavelet-coefficients
#6
Qi Yuan, Weidong Zhou, Fangzhou Xu, Yan Leng, Dongmei Wei
The automatic identification of epileptic electroencephalogram (EEG) signals can give assistance to doctors in diagnosis of epilepsy, and provide the higher security and quality of life for people with epilepsy. Feature extraction of EEG signals determines the performance of the whole recognition system. In this paper, a novel method using the local binary pattern (LBP) based on the wavelet transform (WT) is proposed to characterize the behavior of EEG activities. First, the WT is employed for time-frequency decomposition of EEG signals...
March 19, 2018: International Journal of Neural Systems
https://www.readbyqxmd.com/read/29665572/diagnostic-and-treatment-practices-for-psychogenic-nonepileptic-and-epileptic-seizures-in-namibia
#7
Anina du Toit, Chrisma Pretorius
PURPOSE: Information about existing healthcare resources for the management of seizures in developing countries is lacking. These countries are often poorly equipped to deal with the immense burden of costs, mortality, stigma, seizure-related disability, and comorbidities presented by seizure disorders. This study aimed to contribute to the goals of the International League Against Epilepsy (ILAE) by investigating the resources available for patients with seizure in Namibia. METHODS: Two separate surveys on the diagnostic and treatment practices for epileptic seizures (ES) and psychogenic nonepileptic seizures (PNES) were administered to private healthcare practitioners (HCPs) in Namibia...
April 13, 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29665529/electroclinical-characteristics-and-syndromic-associations-of-eye-condition-related-visual-sensitive-epilepsies-a-cross-sectional-study
#8
Kalyani Dilip Karkare, Ramshekhar N Menon, Ashalatha Radhakrishnan, Ajith Cherian, Sanjeev V Thomas
PURPOSE: The systematic study of visual phenomena such as eye closure (ECLS), eye-closed/fixation-off sensitivity (FOS) [terminology proposed as eye-condition sensitive (ECS) epilepsy] distinct from photosensitivity is rarely explored in literature. METHODS: Clinical, electroencephalographic (EEG) and imaging records of patients attending an epilepsy clinic were screened. Inclusion criterion was demonstrable electrographic visual sensitivitiy in the form of ECS parameters with/without photosensitivity...
March 30, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29665128/a-role-for-astrocyte-derived-amyloid-%C3%AE-peptides-in-the-degeneration-of-neurons-in-an-animal-model-of-temporal-lobe-epilepsy
#9
A Kodam, D Ourdev, M Maulik, J Hariharakrishnan, M Banerjee, Y Wang, S Kar
Kainic acid, an analogue of the excitatory neurotransmitter glutamate, can trigger seizures and neurotoxicity in the hippocampus and other limbic structures in a manner that mirrors the neuropathology of human temporal lobe epilepsy (TLE). However, the underlying mechanisms associated with the neurotoxicity remain unclear. Since amyloid-β (Aβ) peptides, which are critical in the development of Alzheimer's disease, can mediate toxicity by activating glutamatergic NMDA receptors, it is likely that the enhanced glutamatergic transmission that renders hippocampal neurons vulnerable to kainic acid treatment may involve Aβ peptides...
April 17, 2018: Brain Pathology
https://www.readbyqxmd.com/read/29663692/profiles-of-gene-expression-in-the-hippocampal-formation-of-rats-with-experimentally-induced-brain-dysplasia
#10
Michal Kielbinski, Zuzanna Setkowicz, Kinga Gzielo, Krzysztof Janeczko
Malformations of cortical development (MCD) are a common cause of intractable seizures in humans. Among these, focal cortical dysplasia (FCD) poses an outstanding challenge. There are several subtypes of FCD that show significant variation in pathology and clinical presentation. All types exhibit disturbed cortical cytoarchitecture and increased propensity for seizures. The etiology is likely heterogenous, with mutations, specifically in genes related to mammalian target of rapamycin (mTOR), identified in only a subset of cases...
April 16, 2018: Developmental Neurobiology
https://www.readbyqxmd.com/read/29663344/circumstances-of-sudep-a-nationwide-population-based-case-series
#11
Olafur Sveinsson, Tomas Andersson, Sofia Carlsson, Torbjörn Tomson
OBJECTIVE: Given the increasing attention being paid to potential strategies for sudden unexpected death in epilepsy (SUDEP) prevention, we analyzed the circumstances of SUDEP and its incidence in relation to time of year, week, and day. METHODS: Prospective case-series based on persons with an all International Classification of Diseases (ICD-10) code for epilepsy in the Swedish Patient Registry 1998-2005, who were alive on June 30, 2006 (n = 60 952). Linkage to the National Cause-of-Death Registry identified all deaths from July 2006 through December 2011, with epilepsy mentioned on death certificate, together with deaths during 2008 (n = 3166)...
April 17, 2018: Epilepsia
https://www.readbyqxmd.com/read/29663335/long-term-efficacy-of-add-on-lacosamide-treatment-in-children-and-adolescents-with-refractory-epilepsies-a-single-center-observational-study
#12
Anna Rosati, Lucrezia Ilvento, Riccardo Rizzi, Viola Doccini, Maria Carmela Leo, Alessandra Pugi, Salvatore De Masi, Renzo Guerrini
OBJECTIVE: To assess long-term efficacy and tolerability of lacosamide (LCM) as adjunctive treatment through a retrospective study in children and adolescents with refractory epilepsies. METHODS: All patients consecutively treated with LCM as add-on for refractory focal and generalized epilepsy and followed at the Neuroscience Center of Excellence of the Meyer Children's Hospital of Florence between January 2011 and September 2015 were included in the study. Responder rate, relapse-free survival, and retention rate were calculated...
April 17, 2018: Epilepsia
https://www.readbyqxmd.com/read/29661537/pyridoxine-dependent-epilepsy-is-late-onset-a-predictor-for-favorable-outcome
#13
Rooy Rlp de, F J Halbertsma, E A Struijs, Spronsen Fj van, R J Lunsing, H M Schippers, Hasselt Pm van, B Plecko, G Wohlrab, S Whalen, J F Benoist, S Valence, P B Mills, L A Bok
AIM: In pyridoxine dependent epilepsy (PDE), patients usually present with neonatal seizures. A small subgroup is characterized by late-onset beyond 2 months of age. We aim to analyze the observation of relatively good cognitive outcome in this subgroup of late-onset PDE patients. METHODS: We retrospectively analyzed data from four metabolically and genetically confirmed late-onset patients with PDE due to antiquitin (ALDH7A1) deficiency. Data were analyzed regarding ALDH7A1 mutations, alpha-Aminoadipic semialdehyde (α-AASA) and pipecolic acid (PA) levels, medication during pregnancy, delivery, treatment delay, amount of seizures, pyridoxine dose, adjuvant therapy and findings on brain MRI...
March 30, 2018: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/29661262/the-genetics-and-molecular-biology-of-fever-associated-seizures-or-epilepsy
#14
Hao Deng, Wen Zheng, Zhi Song
Fever-associated seizures or epilepsy (FASE) is primarily characterised by the occurrence of a seizure or epilepsy usually accompanied by a fever. It is common in infants and children, and generally includes febrile seizures (FS), febrile seizures plus (FS+), Dravet syndrome (DS) and genetic epilepsy with febrile seizures plus (GEFSP). The aetiology of FASE is unclear. Genetic factors may play crucial roles in FASE. Mutations in certain genes may cause a wide spectrum of phenotypical overlap ranging from isolated FS, FS+ and GEFSP to DS...
April 17, 2018: Expert Reviews in Molecular Medicine
https://www.readbyqxmd.com/read/29660580/an-evaluation-of-kurtosis-beamforming-in-magnetoencephalography-to-localize-the-epileptogenic-zone-in-drug-resistant-epilepsy-patients
#15
Michael B H Hall, Ida A Nissen, Elisabeth C W van Straaten, Paul L Furlong, Caroline Witton, Elaine Foley, Stefano Seri, Arjan Hillebrand
OBJECTIVE: Kurtosis beamforming is a useful technique for analysing magnetoencephalograpy (MEG) data containing epileptic spikes. However, the implementation varies and few studies measure concordance with subsequently resected areas. We evaluated kurtosis beamforming as a means of localizing spikes in drug-resistant epilepsy patients. METHODS: We retrospectively applied kurtosis beamforming to MEG recordings of 22 epilepsy patients that had previously been analysed using equivalent current dipole (ECD) fitting...
March 9, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29660559/potassium-dynamics-and-seizures-why-is-potassium-ictogenic
#16
REVIEW
Marco de Curtis, Laura Uva, Vadym Gnatkovsky, Laura Librizzi
Potassium channels dysfunction and altered genes encoding for molecules involved in potassium homeostasis have been associated with human epilepsy. These observations are in agreement with a control role of extracellular potassium on neuronal excitability and seizure generation. Epileptiform activity, in turn, regulates potassium homeostasis through mechanisms that are still not well established. We review here how potassium-associated processes are regulated in the brain and examine the mechanisms that support the role of potassium in triggering epileptiform activities...
April 10, 2018: Epilepsy Research
https://www.readbyqxmd.com/read/29659666/reliable-digit-span-does-it-adequately-measure-suboptimal-effort-in-an-adult-epilepsy-population
#17
Moshe Maiman, Victor A Del Bene, William S MacAllister, Sloane Sheldon, Eileen Farrell, Miguel Arce Rentería, Mitchell Slugh, Siddhartha S Nadkarni, William B Barr
Objective: Assessment of performance validity is a necessary component of any neuropsychological evaluation. Prior research has shown that cutoff scores of ≤6 or ≤7 on Reliable Digit Span (RDS) can detect suboptimal effort across numerous adult clinical populations; however, these scores have not been validated for that purpose in an adult epilepsy population. This investigation aims to determine whether these previously established RDS cutoff scores could detect suboptimal effort in adults with epilepsy...
April 5, 2018: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29659357/-post-stroke-epilepsy
#18
Federico Rodríguez Lucci, Matías Alet, Sebastián F Ameriso
Stroke is the most common cause of seizures and epilepsy in population stuies of adults. Seizures occur within 24 hours of the stroke in a high percent of patients. The pathogenesis of these early-onset seizures may be related to local ion shifts and release of high levels of excitotoxic neurotransmitters in the area of ischemic injury. The risk of late-onset seizures may increase over time, an underlying permanent lesion that leads to persistent chnges in neuronal excitability appears to be responsible for late-onset seizures after stroke...
2018: Medicina
https://www.readbyqxmd.com/read/29658992/can-mutation-mediated-effects-occurring-early-in-development-cause-long-term-seizure-susceptibility-in-genetic-generalized-epilepsies
#19
Christopher Alan Reid, Ben Rollo, Steven Petrou, Samuel F Berkovic
Epilepsy has a strong genetic component, with an ever-increasing number of disease-causing genes being discovered. Most epilepsy-causing mutations are germ line and thus present from conception. These mutations are therefore well positioned to have a deleterious impact during early development. Here we review studies that investigate the role of genetic lesions within the early developmental window, specifically focusing on genetic generalized epilepsy (GGE). Literature on the potential pathogenic role of sub-mesoscopic structural changes in GGE is also reviewed...
April 16, 2018: Epilepsia
https://www.readbyqxmd.com/read/29658989/the-effectiveness-of-a-group-self-management-education-course-for-adults-with-poorly-controlled-epilepsy-smile-uk-a-randomized-controlled-trial
#20
Leone Ridsdale, Gabriella Wojewodka, Emily J Robinson, Adam J Noble, Myfanwy Morgan, Stephanie J C Taylor, Paul McCrone, Mark P Richardson, Gus Baker, Sabine Landau, Laura H Goldstein
OBJECTIVE: Epilepsy is one of the most common neurological conditions affecting about 1% of adults. Up to 40% of people with epilepsy (PWE) report recurring seizures while on medication. And optimal functioning requires good self-management. Our objective was to evaluate a group self-management education courses for people with epilepsy and drug-resistant seizures by means of a multicenter, pragmatic, parallel group, randomized controlled trial. METHODS: We recruited adults with epilepsy, having ≥2 seizures in the prior 12 months, from specialist clinics...
April 16, 2018: Epilepsia
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