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https://www.readbyqxmd.com/read/28639464/neurophysiological-analysis-of-the-genesis-mechanism-of-eeg-during-the-interictal-and-ictal-periods-using-a-multiple-neural-masses-model
#1
Zhen Ma
Electroencephalography (EEG) is an important method to investigate the neurophysiological mechanism underlying epileptogenesis to identify new therapies for the treatment of epilepsy. The neurophysiologically based neural mass model (NMM) can build a bridge between signal processing and neurophysiology, which can be used as a platform to explore the neurophysiological mechanism of epileptogenesis. Most EEG signals cannot be regarded as the outputs of a single NMM with identical model parameters. The outputs of NMM are simple because the diversity of neural signals in the same NMM is ignored...
April 11, 2017: International Journal of Neural Systems
https://www.readbyqxmd.com/read/28632737/supervised-filters-for-eeg-signal-in-naturally-occurring-epilepsy-forecasting
#2
Francisco Javier Muñoz-Almaraz, Francisco Zamora-Martínez, Paloma Botella-Rocamora, Juan Pardo
Nearly 1% of the global population has Epilepsy. Forecasting epileptic seizures with an acceptable confidence level, could improve the disease treatment and thus the lifestyle of the people who suffer it. To do that the electroencephalogram (EEG) signal is usually studied through spectral power band filtering, but this paper proposes an alternative novel method of preprocessing the EEG signal based on supervised filters. Such filters have been employed in a machine learning algorithm, such as the K-Nearest Neighbor (KNN), to improve the prediction of seizures...
2017: PloS One
https://www.readbyqxmd.com/read/28632329/postictal-hypoperfusion-hypoxia-provides-the-foundation-for-a-unified-theory-of-seizure-induced-brain-abnormalities-and-behavioral-dysfunction
#3
REVIEW
Jordan S Farrell, Roberto Colangeli, Marshal D Wolff, Alexandra K Wall, Thomas J Phillips, Antis George, Paolo Federico, G Campbell Teskey
A recent article by Farrell et al. characterizes the phenomenon, mechanisms, and treatment of a local and severe hypoperfusion/hypoxia event that occurs in brain regions following a focal seizure. Given the well-established role of cerebral ischemia/hypoxia in brain damage and behavioral dysfunction in other clinical settings (e.g., stroke, cerebral vasospasm), we put forward a new theory: postictal hypoperfusion/hypoxia is responsible for the negative consequences associated with seizures. Fortunately, inhibition of two separate molecular targets, cyclooxygenase-2 (COX-2) and l-type calcium channels, can prevent the expression of postictal hypoperfusion/hypoxia...
June 20, 2017: Epilepsia
https://www.readbyqxmd.com/read/28626478/comparative-effects-of-chronic-administrations-of-gabapentin-pregabalin-and-baclofen-on-rat-memory-using-object-recognition-test
#4
Asma Salimzade, Ali Hosseini-Sharifabad, Mohammad Rabbani
Memory impairment is one of the greatest concerns when it comes to long-term CNS-affecting drug administration. Drugs like gabapentin, pregabalin and baclofen are administered in a long-term period in conditions such as epilepsy, neuropathic pain, spasticity associated with spinal cord injury or multiple sclerosis. Despite their wide spread use, few data are available on the effects of these drugs on cognitive functions, such as learning memory. In the present study, the effects of long-term administration of gabapentin, pregabalin and baclofen on memory were investigated in a comparative manner...
June 2017: Research in Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28608234/genomics-guided-precise-anti-epileptic-drug-development
#5
Norman Delanty, Gianpiero Cavallleri
Traditional antiepileptic drug development approaches have yielded many important clinically valuable anti-epileptic drugs. However, the screening of promising compounds has been naturally agnostic to epilepsy etiology in individual human patients. Now, genomic medicine is changing the way we view human disease. International collaborations are unraveling the many molecular genetic causes of the epilepsies, including the early onset epileptic encephalopathies, and some of the familial focal epilepsies. Further advances in precision diagnostics will be facilitated by ongoing large collaborations and the wider availability of whole exome and whole genome sequencing in clinical practice...
June 12, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28607632/mitochondrial-transfer-from-wharton-s-jelly-mesenchymal-stem-cell-to-merrf-cybrid-reduces-oxidative-stress-and-improves-mitochondrial-bioenergetics
#6
Yao-Chung Chuang, Chia-Wei Liou, Shang-Der Chen, Pei-Wen Wang, Jiin-Haur Chuang, Mao-Meng Tiao, Te-Yao Hsu, Hung-Yu Lin, Tsu-Kung Lin
Myoclonus epilepsy associated with ragged-red fibers (MERRF) is a maternally inherited mitochondrial disease affecting neuromuscular functions. Mt.8344A>G mutation in mitochondrial DNA (mtDNA) is the most common cause of MERRF syndrome and has been linked to an increase in reactive oxygen species (ROS) level and oxidative stress, as well as impaired mitochondrial bioenergetics. Here, we tested whether WJMSC has therapeutic potential for the treatment of MERRF syndrome through the transfer of mitochondria...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28606039/the-progress-of-epilepsy-after-stroke
#7
Yinghao Zhao, Xiangyan Li, Kun Zhang, Ti Tong, Ranji Cui
Epilepsy is the second most common disease caused by multiple factors and characterized by an excessive discharge of certain neurons in the nervous system. Cerebrovascular disease, including stroke, is viewed as the most common cause of epilepsy in the elderly population, accounting for 30%-50% of the newly diagnosed cases of epilepsy cases in this age group. Depending on the underlying cerebrovascular disease, 3%-30% of patients after stroke may develop post-stroke epilepsy (PSE), which has a negative effect on stroke prognosis and the quality of life...
June 12, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28599984/prevention-and-management-of-postoperative-seizures-in-neuro-oncology
#8
F Chassoux, E Landre
INTRODUCTION: Epilepsy related to brain tumors is often difficult to treat and may impact the quality of life. We performed a review of current recommendations for the prevention of postoperative seizures and optimizing the anti-epileptic treatment. MATERIAL AND METHODS: Based on studies performed since 2000 we conducted the review by (1) analyzing the incidence of tumoral epilepsy and mechanisms of epileptogenicity; (2) describing the current medical and surgical strategy according to oncologic treatments; (3) discussing the management of postoperative seizures; (4) considering the drug withdrawal after oncologic therapy...
June 6, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28597842/adjunctive-lacosamide-for-focal-epilepsy-an-open-label-trial-evaluating-the-impact-of-flexible-titration-and-dosing-on-safety-and-seizure-outcomes
#9
Michel Baulac, Safia Coulbaut, Pamela Doty, Cindy McShea, Marc De Backer, Fabrice Bartolomei, Mihaela Vlaicu
To evaluate the safety and effectiveness of lacosamide in a real-life setting with the use of a flexible dose titration schedule and individualised maintenance doses up to the maximum approved dose of 400 mg/day. Adults with a diagnosis of focal seizures, with or without secondary generalization, were enrolled in this open-label Phase IV trial (NCT01235403). Lacosamide was initiated at 100 mg/day (50 mg bid) and uptitrated over a 12-week period to 200, 300 or 400 mg/day, based on safety and seizure control...
June 8, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28591482/hypothalamic-hamartoma-epileptogenesis-beyond-the-lesion
#10
Julia Scholly, Anke Maren Staack, Philippe Kahane, Didier Scavarda, Jean Régis, Edouard Hirsch, Fabrice Bartolomei
The discovery of intrinsic epileptogenicity of the hypothalamic hamartoma (HH) marked a new area in understanding the associated clinical syndrome, often manifesting as progressive epileptic encephalopathy. However, therapeutic procedures targeting the HH proved to be inefficient to cure seizures in up to 50% of cases, whereas in cases with partial improvement, the electroclinical patterns of persisting seizures suggest an involvement of distant cortical regions. The concept of kindling-like secondary epileptogenesis has been suggested as a possible underlying mechanism...
June 2017: Epilepsia
https://www.readbyqxmd.com/read/28589521/strengthening-the-case-for-epilepsy-drug-development-bridging-experiences-from-the-alzheimer-s-disease-field-an-opinion
#11
Roy E Twyman
Given the sheer number of drugs (over 20!) available for treatment of seizures, epilepsy can be considered one of the most successful areas in pharmaceutical development and especially for neuroscience. However, despite the large number of drug treatment options available for managing patients with epilepsy, there remains considerable unmet need. For example, the overall impact on seizure control has not been substantial with approximately 30% of patients remaining refractory or their seizures not adequately controlled...
June 7, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28587680/in-vitro-antineoplastic-effects-of-brivaracetam-and-lacosamide-on-human-glioma-cells
#12
Ambra Rizzo, Sara Donzelli, Vita Girgenti, Andrea Sacconi, Chiara Vasco, Andrea Salmaggi, Giovanni Blandino, Marta Maschio, Emilio Ciusani
BACKGROUND: Epilepsy is a frequent symptom in patients with glioma. Although treatment with antiepileptic drugs is generally effective in controlling seizures, drug-resistant patients are not uncommon. Multidrug resistance proteins (MRPs) and P-gp are over-represented in brain tissue of patients with drug-resistant epilepsy, suggesting their involvement in the clearance of antiepileptic medications. In addition to their anticonvulsant action, some drugs have been documented for cytotoxic effects...
June 6, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28585316/patterns-of-antiepileptic-drug-prescription-in-sweden-a%C3%A2-register-based-approach
#13
K Bolin, F Berggren, P Berling, S Morberg, H Gauffin, A-M Landtblom
OBJECTIVES: To determine drug utilization pathways from the incident healthcare visit due to epilepsy and three years onward. MATERIAL AND METHODS: Anti-epileptic drug utilization was calculated using individual information on inpatient- and outpatient care utilization and drug sales. Throughout, we used national register information pertaining to pharmaceutical sales linked to diagnosis-related healthcare utilization. Information on pharmaceutical sales was collected for the 2007-2013 period...
June 5, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28579820/cannabis-and-intractable-chronic-pain-an-explorative-retrospective-analysis-of-italian-cohort-of-614-patients
#14
Guido Fanelli, Giuliano De Carolis, Claudio Leonardi, Adele Longobardi, Ennio Sarli, Massimo Allegri, Michael E Schatman
BACKGROUND: Despite growing interest in the therapeutic use of cannabis to manage chronic pain, only limited data that address these issues are available. In recent years, a number of nations have introduced specific laws to allow patients to use cannabis preparations to treat a variety of medical conditions. In 2015, the Italian government authorized the use of cannabis to treat several diseases, including chronic pain generally, spasticity in multiple sclerosis, cachexia and anorexia among AIDS and cancer patients, glaucoma, Tourette syndrome, and certain types of epilepsy...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28577986/automated-analysis-of-brain-activity-for-seizure-detection-in-zebrafish-models-of-epilepsy
#15
Borbála Hunyadi, Aleksandra Siekierska, Jo Sourbron, Daniëlle Copmans, Peter A M de Witte
BACKGROUND: Epilepsy is a chronic neurological condition, with over 30% of cases unresponsive to treatment. Zebrafish larvae show great potential to serve as an animal model of epilepsy in drug discovery. Thanks to their high fecundity and relatively low cost, they are amenable to high-throughput screening. However, the assessment of seizure occurrences in zebrafish larvae remains a bottleneck, as visual analysis is subjective and time-consuming. NEW METHOD: For the first time, we present an automated algorithm to detect epileptic discharges in single-channel local field potential (LFP) recordings in zebrafish...
June 1, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28577562/current-role-of-perampanel-in-pediatric-epilepsy
#16
REVIEW
Paola De Liso, Romina Moavero, Giangennaro Coppola, Paolo Curatolo, Raffaella Cusmai, Giovambattista De Sarro, Emilio Franzoni, Federico Vigevano, Alberto Verrotti
Perampanel is among the latest AEDs approved, indicated for the treatment of partial-onset seizures with or without secondary generalization, and for primary generalized tonic-clonic seizures, in patients aged 12 years and older. This paper summarizes the clinical recommendations on the current role of perampanel in the treatment of pediatric epilepsies and future directions for research. The optimal dosage should be comprised between 4 and 12 mg/day, with 8 mg/day being the most common dosage used. The rate and severity of adverse events, including psychiatric symptoms, can be decreased by starting at low doses, and titrating slowly...
June 2, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28555833/predictive-models-in-the-diagnosis-and-treatment-of-autoimmune-epilepsy
#17
Divyanshu Dubey, Jaysingh Singh, Jeffrey W Britton, Sean J Pittock, Eoin P Flanagan, Vanda A Lennon, Jan-Mendelt Tillema, Elaine Wirrell, Cheolsu Shin, Elson So, Gregory D Cascino, Dean M Wingerchuk, Matthew T Hoerth, Jerry J Shih, Katherine C Nickels, Andrew McKeon
OBJECTIVE: To validate predictive models for neural antibody positivity and immunotherapy response in epilepsy. METHODS: We conducted a retrospective study of epilepsy cases at Mayo Clinic (Rochester-MN; Scottsdale-AZ, and Jacksonville-FL) in whom autoimmune encephalopathy/epilepsy/dementia autoantibody testing profiles were requested (06/30/2014-06/30/2016). An Antibody Prevalence in Epilepsy (APE) score, based on clinical characteristics, was assigned to each patient...
May 26, 2017: Epilepsia
https://www.readbyqxmd.com/read/28532713/electroencephalography-after-a-single-unprovoked-seizure
#18
REVIEW
Derek B Debicki
Electroencephalography (EEG) is an essential diagnostic tool in the evaluation of seizure disorders. In particular, EEG is used as an additional investigation for a single unprovoked seizure. Epileptiform abnormalities are related to seizure disorders and have been shown to predict recurrent unprovoked seizures (i.e., a clinical definition of epilepsy). Thus, the identification of epileptiform abnormalities after a single unprovoked seizure can inform treatment options. The current review addresses the relationship between EEG abnormalities and seizure recurrence...
July 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28528670/glycine-receptor-drug-discovery
#19
Joseph W Lynch, Yan Zhang, Sahil Talwar, Argel Estrada-Mondragon
Postsynaptic glycine receptor (GlyR) chloride channels mediate inhibitory neurotransmission in the spinal cord and brain stem, although presynaptic and extrasynaptic GlyRs are expressed more widely throughout the brain. In humans, GlyRs are assembled as homo- or heteromeric pentamers of α1-3 and β subunits. GlyR malfunctions have been linked to a range of neurological disorders including hyperekplexia, temporal lobe epilepsy, autism, breathing disorders, and chronic inflammatory pain. Although it is possible that GlyRs may eventually be clinically targeted for a variety of neurological disorders, most research to date has focused on developing GlyR-targeted treatments for chronic pain...
2017: Advances in Pharmacology
https://www.readbyqxmd.com/read/28521671/the-anticonvulsant-effects-of-ketogenic-diet-on%C3%A2-epileptic-seizures-and-potential-mechanisms
#20
Yifan Zhang, Jingwei Xu, Yingchao Zhang, Wei Yang, Bingjin Li
Epilepsy is one of the most commonly diagnosed neurologic disorders with characteristics of epileptic seizures. Although the multitude of anticonvulsant drugs has been developed, recurrent epileptic seizures remain intractable and contribute to the serious morbidity worldwide. Recently, increasing studies have established the beneficial effects of ketogenic diet (KD) on epileptic seizure reduction. Both basic experiments and clinical trials demonstrated that KD significantly reduced seizure frequency with mild adverse effects...
May 17, 2017: Current Neuropharmacology
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