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https://www.readbyqxmd.com/read/28324955/identifying-important-regions-in-eeg-epilepsy-brain-networks
#1
Nantia D Iakovidou, Manolis Christodoulakis, Eleftherios S Papathanasiou, Savvas S Papacostas, Georgios D Mitsis
The human brain has been called the most complex object in the known universe and in many ways it constitutes the final frontier of science. Lately, the functional connectivity in human brain has been regarded and studied as a complex network using electroencephalography (EEG) signals. This means that the brain is studied as a connected system, where nodes represent different specialized brain regions and links or connections, represent communication pathways between the nodes. It is also fairly established that graph theory provides a variety of measures, methods and tools that can be useful to efficiently model, analyze and study an EEG network...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324954/hardware-friendly-seizure-detection-with-a-boosted-ensemble-of-shallow-decision-trees
#2
Mahsa Shoaran, Masoud Farivar, Azita Emami
Efficient on-chip learning is becoming an essential element of implantable biomedical devices. Despite a substantial literature on automated seizure detection algorithms, hardware-friendly implementation of such techniques is not sufficiently addressed. In this paper, we propose to employ a gradientboosted ensemble of decision trees to achieve a reasonable trade-off between detection accuracy and implementation cost. Combined with the proposed feature extraction model, we show that these classifiers quickly become competitive with more complex learning models previously proposed for hardware implementation, with only a small number of low-depth (d <; 4) "shallow" trees...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324947/a-sparse-laguerre-volterra-autoregressive-model-for-seizure-prediction-in-temporal-lobe-epilepsy
#3
Pen-Ning Yu, Shokofeh A Naiini, Christi N Heck, Charles Y Liu, Dong Song, Theodore W Berger
A sparse Laguerre-Volterra autoregressive model has been developed as feature extraction from subdural human EEG data for seizure prediction in temporal lobe epilepsy. The use of Laguerre-Volterra kernel can compactly yield an autoregressive model of longer system memory without increasing the number of the coefficients. In 6 sets of seizure, we used a sparse Laguerre-Volterra autoregressive model with 6 coefficients and the decay parameter of 0.2 and obtained the 10-fold cross-validation prediction results of high Matthews correlation coefficients (0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324765/hd-tdcs-in-refractory-lateral-frontal-lobe-epilepsy-patients
#4
Sanaz Ahmadi Karvigh, Mahmoud Motamedi, Mahsa Arzani, Javad Hasan Nia Roshan
PURPOSE: To evaluate the anticonvulsant effect of the novel high definition transcranial direct current stimulation (HD-tDCS) method on patients with refractory lateral frontal lobe epilepsy. The effects of HD-tDCS on working memory were also examined. METHOD: 10 adult patients with intractable lateral frontal lobe epilepsy were studied. A central cathode electrode was placed on the epileptogenic zone according to LTM, and 20-min sessions of 2mA HD-tDCS were applied for 10 consecutive days...
March 14, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28324681/morphometric-mri-features-are-associated-with-surgical-outcome-in-mesial-temporal-lobe-epilepsy-with-hippocampal-sclerosis
#5
Maria Teresa Fernandes Castilho Garcia, Larissa Botelho Gaça, Gabriel Barbosa Sandim, Idaiane Batista Assunção Leme, Henrique Carrete, Ricardo Silva Centeno, João Ricardo Sato, Elza Márcia Targas Yacubian
PURPOSE: Corticoamygdalohippocampectomy (CAH) improves seizure control, quality of life, and decreases mortality for refractory mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS). One-third of patients continue having seizures, and it is pivotal to determine structural abnormalities that might influence the postoperative outcome. Studies indicate that nonhippocampal regions may play a role in the epileptogenic network in MTLE-HS and could generate seizures postoperatively...
March 1, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28324653/evaluation-of-brain-pharmacokinetic-and-neuropharmacodynamic-attributes-of-antiepileptic-drug-lacosamide-in-hepatic-and-renal-impairment-preclinical-evidence
#6
Baldeep Kumar, Manish Modi, Biman Saikia, Bikash Medhi
The knowledge of pharmacokinetic and pharmacodynamic properties of antiepileptic drugs is helpful in optimizing drug therapy for epilepsy. This study was designed to evaluate the pharmacokinetic and pharmacodynamic properties of lacosamide in experimentally induced hepatic and renal impairment in seizure animals. Hepatic or renal impairment was induced by injection of carbon tetrachloride or diclofenac sodium, respectively. After induction, the animals were administered with a single dose of lacosamide. At different time points, MES seizure recordings were done followed by isolation of plasma and brain samples for drug quantification and pharmacodynamic measurements...
March 21, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28324301/neuroimaging-in-epilepsy
#7
REVIEW
Erik H Middlebrooks, Lawrence Ver Hoef, Jerzy P Szaflarski
In recent years, the field of neuroimaging has undergone dramatic development. Specifically, of importance for clinicians and researchers managing patients with epilepsies, new methods of brain imaging in search of the seizure-producing abnormalities have been implemented, and older methods have undergone additional refinement. Methodology to predict seizure freedom and cognitive outcome has also rapidly progressed. In general, the image data processing methods are very different and more complicated than even a decade ago...
April 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28324217/rare-slc1a1-variants-in-hot-water-epilepsy
#8
Kalpita Rashimi Karan, P Satishchandra, Sanjib Sinha, Anuranjan Anand
Hot water epilepsy is sensory epilepsy, wherein seizures are triggered by an unusual stimulus: contact with hot water. Although genetic factors contribute to the etiology of hot water epilepsy, molecular underpinnings of the disorder remain largely unknown. We aimed to identify the molecular genetic basis of the disorder by studying families with two or more of their members affected with hot water epilepsy. Using a combination of genome-wide linkage mapping and whole exome sequencing, a missense variant was identified in SLC1A1 in a three-generation family...
March 21, 2017: Human Genetics
https://www.readbyqxmd.com/read/28320117/use-of-social-media-to-assess-the-effectiveness-of-vagal-nerve-stimulation-in-dravet-syndrome-a-caregiver-s-perspective
#9
Rushna Ali, Mona Elsayed, Manpreet Kaur, Ellen Air, Naznin Mahmood, Jules Constantinou, Jason Schwalb
BACKGROUND: Dravet syndrome (DS) is a rare genetic epilepsy syndrome which is particularly pharmacoresistant. Vagus nerve stimulation (VNS) is commonly used in the treatment of DS as an adjunct to medical therapy. A meaningful assessment of post-surgical outcomes with VNS is difficult given the rarity of the condition. OBJECTIVE: In a novel approach, we used social media to contact patients with DS to gather data on post-surgical seizure reduction and overall satisfaction with VNS...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319879/how-can-we-explain-the-frontal-presentation-of-insular-lobe-epilepsy-the-impact-of-non-linear-analysis-of-insular-seizures
#10
Koichi Hagiwara, Julien Jung, Romain Bouet, Chifaou Abdallah, Marc Guénot, Luis Garcia-Larrea, François Mauguière, Sylvain Rheims, Jean Isnard
OBJECTIVE: For a decade it has been known that the insular lobe epilepsy can mimic frontal lobe epilepsy. We aimed to clarify the pattern of functional coupling occurring during the frontal presentation. METHODS: We analyzed five insular lobe epilepsy patients. Frontal semiology was predominant for three of them, whereas insular semiology was predominant for the two others. We applied the non-linear regression analysis to stereoelectroencephalography-recorded seizures...
February 13, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28318732/paroxysmal-events-during-prolonged-video-video-electroencephalography-monitoring-in-refractory-epilepsy
#11
A Sanabria-Castro, F Henríquez-Varela, C Monge-Bonilla, S Lara-Maier, M Sittenfeld-Appel
INTRODUCTION: Given that epileptic seizures and non-epileptic paroxysmal events have similar clinical manifestations, using specific diagnostic methods is crucial, especially in patients with drug-resistant epilepsy. Prolonged video electroencephalography monitoring during epileptic seizures reveals epileptiform discharges and has become an essential procedure for epilepsy diagnosis. The main purpose of this study is to characterise paroxysmal events and compare patterns in patients with refractory epilepsy...
March 16, 2017: Neurología: Publicación Oficial de la Sociedad Española de Neurología
https://www.readbyqxmd.com/read/28318128/proton-mr-spectroscopy-in-patients-with-nonlesional-insular-cortex-epilepsy-confirmed-by-invasive-eeg-recordings
#12
Yasmine Aitouche, Steve A Gibbs, Guillaume Gilbert, Olivier Boucher, Alain Bouthillier, Dang Khoa Nguyen
BACKGROUND AND PURPOSE: Recent studies suggest that a nonnegligible proportion of drug-resistant epilepsy surgery candidates have an epileptogenic zone that involves the insula. We aimed to examine the value of proton magnetic resonance spectroscopy ((1) H-MRS) in identifying patients with insular cortex epilepsy. METHODS: Patients with possible nonlesional drug-refractory insular epilepsy underwent a voxel-based (1) H-MRS study prior to an intracranial electroencephalographic (EEG) study...
March 20, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28317156/synthesis-and-anticonvulsant-properties-of-new-3-3-diphenyl-2-5-dioxo-pyrrolidin-1-yl-acetamides-and-3-3-diphenyl-propionamides
#13
Jolanta Obniska, Anna Rapacz, Sabina Rybka, Małgorzata Góra, Paweł Żmudzki, Krzysztof Kamiński
The focused library of new amides derived from 3,3-diphenyl-2,5-dioxo-pyrrolidin-1-yl-acetic acid (2a-t) and 3,3-diphenyl-propionic acid (3a-t) as potential anticonvulsant agents was synthesized. The final products were obtained in the amidation reaction of the given carboxylic acid (2, 3) with appropriate secondary amines in the presence of carbonyldiimidazole (CDI) as a coupling reagent. The initial anticonvulsant screening was performed in mice intraperitoneally (i.p.) using the "classical" maximal electroshock (MES) and subcutaneous pentylenetetrazole (scPTZ) seizure models, whereas the acute neurological toxicity was determined applying the rotarod test...
March 20, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/28316319/epileptic-spasms-in-paediatric-post-traumatic-epilepsy-at-a-tertiary-referral-centre
#14
Jun T Park, Harry T Chugani
To recognize epileptic spasms (ES) as a seizure type after traumatic brain injury (TBI), accidental or non-accidental, in infants and children. In the process, we aim to gain some insight into the mechanisms of epileptogenesis in ES. A retrospective electronic chart review was performed at the Children's Hospital of Michigan from 2002 to 2012. Electronic charts of 321 patients were reviewed for evidence of post-traumatic epilepsy. Various clinical variables were collected including age at TBI, mechanism of trauma, severity of brain injury, electroencephalography/neuroimaging data, and seizure semiology...
March 17, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28316255/a-bayesian-double-fusion-model-for-resting-state-brain-connectivity-using-joint-functional-and-structural-data
#15
Hakmook Kang, Hernando Ombao, Christopher Fonnesbeck, Zhaohua Ding, Victoria L Morgan
Current approaches separately analyze concurrently acquired diffusion tensor imaging (DTI) and functional magnetic resonance imaging (fMRI) data. The primary limitation of these approaches is that they do not take advantage of the information from DTI that could potentially enhance estimation of resting state functional connectivity (FC) between brain regions. To overcome this limitation, we develop a Bayesian hierarchical spatio-temporal model that incorporates structural connectivity into estimating FC. In our proposed approach, structural connectivity (SC) based on DTI data is used to construct an informative prior for functional connectivity based on resting state fMRI data via the Cholesky decomposition...
March 19, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28315958/brain-tumor-location-influences-the-onset-of-acute-psychiatric-adverse-events-of-levetiracetam-therapy-an-observational-study
#16
Vincenzo Belcastro, Laura Rosa Pisani, Silvio Bellocchi, Paolo Casiraghi, Gaetano Gorgone, Marco Mula, Francesco Pisani
To explore possible correlations among brain lesion location, development of psychiatric symptoms and the use of antiepileptic drugs (AEDs) in a population of patients with brain tumor and epilepsy. The medical records of 283 patients with various types of brain tumor (161 M/122 F, mean age 64.9 years) were analysed retrospectively. Patients with grade III and IV glioma, previous history of epileptic seizures and/or psychiatric disorders were excluded. Psychiatric symptoms occurring after initiation of AED therapy were considered as treatment emergent psychiatric adverse events (TE-PAEs) if they fulfilled the following conditions: (1) onset within 4 weeks after the beginning of AED therapy; (2) disappearance on drug discontinuation; (3) absence of any other identified possible concurrent cause...
March 18, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28315806/paroxysmal-nonepileptic-events-in-children-with-epilepsy
#17
Yuji Ito, Hiroyuki Kidokoro, Tamiko Negoro, Masaharu Tanaka, Yu Okai, Yoko Sakaguchi, Chikako Ogawa, Tomoya Takeuchi, Atsuko Ohno, Hiroyuki Yamamoto, Tomohiko Nakata, Satoshi Maesawa, Kazuyoshi Watanabe, Yoshiyuki Takahashi, Jun Natsume
OBJECTIVE: The aim of this study was to clarify the characteristics of paroxysmal nonepileptic events (PNEs) suspected as being epileptic seizures by families of children with epilepsy. METHODS: The video-EEG (vEEG) recordings of habitual paroxysmal events in children with epilepsy at Nagoya University Hospital between October 2006 and January 2016 were reviewed. Based on the doctor's suspicion before the vEEG, the PNEs were divided into two groups that included PNEs suspected as epileptic seizures and PNEs suspected as PNEs...
February 27, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28315500/relation-between-sexual-dysfunctions-and-epilepsy-type-of-epilepsy-type-of-antiepileptic-drugs-a-prospective-study
#18
Carlo Pavone, Ninfa Giacalone, Lidia Urso, Leila Zummo, Brigida Fierro
INTRODUCTION: The aim of this study was to evaluate the incidence of sexual dysfunctions in males with epilepsy, the type of epilepsy, the frequency of seizures, the type of antiepileptic drugs (AEDs), the serum hormonal profile and the presence of psychiatric comorbidity. METHODS: Sixty-one patients focused on type of epilepsy, frequency of seizures, AEDs, hormonal profile and presence of mood disorders. We excluded all patients with severe neurologic and psychiatric impairment and patient who were not able to fill questionnaires...
March 18, 2017: Urologia
https://www.readbyqxmd.com/read/28315465/early-preclinical-evaluation-of-dihydropyrimidin-thi-ones-as-potential-anticonvulsant-drug-candidates
#19
Mariana Matias, Gonçalo Campos, Samuel Silvestre, Amílcar Falcão, Gilberto Alves
Although significant advances are occurring in epilepsy research, about 30% of epileptic patients are still inadequately controlled by standard drug therapy. For this reason, it continues to be important to develop new chemical entities through which epilepsy could be effectively controlled. In this study, the anticonvulsant activity of forty-two dihydropyrimidin(thi)ones was explored and their efficacy was evaluated in rodents against the maximal electroshock seizure (MES) and subcutaneous pentylenetetrazole tests...
March 14, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28315457/anticonvulsant-activity-and-acute-neurotoxic-profile-of-achyranthes-aspera-linn
#20
Dinesh Y Gawande, Dmitry Druzhilovsky, Raghbir Chand Gupta, Vladimir Poroikov, Rajesh Kumar Goel
ETHNOPHARMACOLOGICAL RELEVANCE: Root powder of Achyranthes aspera Linn. (A. aspera) belongs to family Amaranthaceae is used in Indian traditional medicine for the management of epilepsy and its efficacy is widely acclaimed among the different rural communities. AIM OF THE STUDY: The present study was aimed to establish the possible anticonvulsant effect of A. aspera methanolic root extract using acute anticonvulsant models and to evaluate the acute toxicity and neurotoxic potential A...
March 14, 2017: Journal of Ethnopharmacology
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