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Mri and epilepsy

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https://www.readbyqxmd.com/read/28646692/specific-subcortical-structures-are-activated-during-seizure-induced-death-in-a-model-of-sudden-unexpected-death-in-epilepsy-sudep-a-manganese-enhanced-magnetic-resonance-imaging-study
#1
Srinivasa P Kommajosyula, Marcus E Randall, Thomas J Brozoski, Boris M Odintsov, Carl L Faingold
Sudden unexpected death in epilepsy (SUDEP) is a major concern for patients with epilepsy. In most witnessed cases of SUDEP generalized seizures and respiratory failure preceded death, and pre-mortem neuroimaging studies in SUDEP patients observed changes in specific subcortical structures. Our study examined the role of subcortical structures in the DBA/1 mouse model of SUDEP using manganese-enhanced magnetic resonance imaging (MEMRI). These mice exhibit acoustically-evoked generalized seizures leading to seizure-induced respiratory arrest (S-IRA) that results in sudden death unless resuscitation is rapidly instituted...
May 25, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28644979/intraoperative-fast-ripples-independently-predict-postsurgical-epilepsy-outcome-comparison-with-other-electrocorticographic-phenomena
#2
Shaun A Hussain, Gary W Mathern, Phoebe Hung, Julius Weng, Raman Sankar, Joyce Y Wu
In the surgical management of epilepsy, the resection of cortex exhibiting interictal fast ripples (250-500Hz) on electrocorticography has been linked to postoperative seizure-freedom. Although fast ripples appear to accurately identify the epileptogenic zone-the minimum tissue that must be removed at surgery to achieve seizure-freedom-it has not been established that fast ripples are a superior biomarker in comparison with multimodal presurgical neuroimaging and other electrocorticography abnormalities. Hence, in the prediction of postoperative seizure-freedom, we compared the value of fast ripples with other intraoperative electocorticography abnormalities including focal slowing, paroxysmal fast activity, intermittent spike discharges, continuous epileptiform discharges, focal attenuation, and intraoperative seizures, as well as complete resection of the lesion defined by MRI and other neuroimaging...
June 16, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28644203/invasive-investigation-of-insular-cortex-epilepsy
#3
Philippe Ryvlin, Fabienne Picard
Invasive long-term EEG investigations of the insula have been performed since the mid-nineties in an expanding range of focal epilepsies suspected to involve the insular cortex. The various clinical forms of insular epilepsies were delineated during the last 2 decades, and include the following presentations: perisylvian epilepsy, temporal plus epilepsy, sleep hypermotor epilepsy, MRI-negative frontal and parietal lobe epilepsies, and insular lesions. In fact, a majority of complex stereoelectroencephalography procedures will include at least one electrode targeting the insula...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644201/insular-epilepsy-semiology-and-noninvasive-investigations
#4
Sami Obaid, Younes Zerouali, Dang Khoa Nguyen
In this review, authors discuss the semiology and noninvasive investigations of insular epilepsy, an underrecognized type of epilepsy, which may mimic other focal epilepsies. In line with the various functions of the insula and its widespread network of connections, insular epilepsy may feature a variety of early ictal manifestations from somatosensory, visceral, olfactory, gustatory, or vestibular manifestations. Depending on propagation pathways, insular seizures may also include altered consciousness, dystonic posturing, complex motor behaviors, and even autonomic features...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644064/frequent-vomiting-attacks-in-a-patient-with-lhermitte-duclos-disease-a-rare-pathophysiology-of-cerebellar-lesions
#5
Chika Somagawa, Tomonori Ono, Ryoko Honda, Hiroshi Baba, Takeshi Hiu, Ryujiro Ushijima, Keisuke Toda, Kei Sato, Masahiro Ito, Keisuke Tsutsumi
Lhermitte-Duclos disease (LDD) is a neurological disease caused by a hamartomatous lesion in the cerebellum. Clinically, LDD is commonly associated with progressive space-occupying lesion effects in the posterior fossa, increasing intracranial pressure, occlusive hydrocephalus, and focal neurological deficits of adjacent structures. The authors report the case of a 10-year-old boy with LDD who had been suffering from vomiting attacks (VAs). These VAs had been brief in duration but extremely frequent, and they had been resistant to antiemetic drugs since the early postnatal period...
June 23, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28643843/perisylvian-including-insular-childhood-epilepsy-presurgical-workup-and-surgical-outcome
#6
Elena Freri, Sara Matricardi, Francesca Gozzo, Massimo Cossu, Tiziana Granata, Laura Tassi
OBJECTIVE: To report the presurgical workup, surgical procedures, and outcomes in a series of pediatric patients with drug-resistant epilepsy involving the perisylvian/insular regions. METHODS: We retrospectively assessed 16 pediatric patients affected by drug-resistant focal epilepsy involving perisylvian/insular regions, who consecutively underwent tailored resective surgery. All patients underwent a detailed presurgical workup, which included the analysis of the anatomoelectroclinical correlations with scalp electroencephalography (EEG) and/or with stereo-electroencephalography (SEEG), brain magnetic resonance imaging (MRI), and comprehensive cognitive and neuropsychological evaluations...
June 23, 2017: Epilepsia
https://www.readbyqxmd.com/read/28637943/stereoelectroencephalography-indication-and-efficacy
#7
Koji Iida, Hiroshi Otsubo
Stereoelectroencephalography (SEEG) is a method for invasive study of patients with refractory epilepsy. Localization of the epileptogenic zone in SEEG relied on the hypothesis of anatomo-electro-clinical analysis limited by X-ray, analog electroencephalography (EEG), and seizure semiology in the 1950s. Modern neuroimaging studies and digital video-EEG have developed the hypothesis aiming at more precise localization of the epileptic network. Certain clinical scenarios favor SEEG over subdural EEG (SDEEG). SEEG can cover extensive areas of bilateral hemispheres with highly accurate sampling from sulcal areas and deep brain structures...
June 20, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28637637/alternating-hemiplegia-of-childhood-and-a-pathogenic-variant-of-atp1a3-a-case-report-and-pathophysiological-considerations
#8
Elena Pavlidis, Peter Uldall, Camilla Gøbel Madsen, Marina Nikanorova, Martin Fabricius, Hans Høgenhaven, Francesco Pisani, Rikke S Møller, Elena Gardella, Guido Rubboli
We describe a case of a child suffering from alternating hemiplegia with a heterozygous p. E815K pathogenic variant of ATP1A3. The patient started to present abnormal eye movements in the first days of life, followed by the appearance at 2 months of dystonic episodes, and later on, by recurrent episodes of alternating hemiplegia more often on the right side. A severe epilepsy started at the age of 2 years with episodes of status epilepticus since the onset which frequently recurred, requiring admission to the intensive care unit...
June 19, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28637636/epilepsy-after-cerebral-infection-review-of-the-literature-and-the-potential-for-surgery
#9
Georgia Ramantani, Hans Holthausen
The risk of unprovoked seizures in population-based cohorts of cerebral infection survivors is 7-8% in developed countries, rising to considerably higher rates in resource-poor countries. The main risk factors for epilepsy after cerebral infection, besides acute seizures, are infection-associated brain lesions and status epilepticus during the acute phase. Despite the high prevalence of pharmacoresistant epilepsies after cerebral infections, especially in patients with MRI-identifiable lesions, only a small minority undergoes epilepsy surgery...
June 19, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28633092/epilepsy-in-neurofibromatosis-type-1
#10
Anthony Pecoraro, Eric Arehart, William Gallentine, Rodney Radtke, Edward Smith, Carolyn Pizoli, Sujay Kansagra, Elie Abdelnour, Roger McLendon, Mohamad A Mikati
OBJECTIVES: To describe the characteristics of epilepsy in patients with Neurofibromatosis type 1 (NF1). METHODS: Analysis of a cohort of consecutive NF1 patients seen in our NF1 clinic during a three-year period. RESULTS: Of the 184 NF1 patients seen during that period, 26 had epilepsy and three had febrile seizures. Of the 26, 17 (65%) had localization-related epilepsy, seven of whom (41%) were drug resistant. Six (23%) had apparently primary generalized epilepsy (0/6 drug resistant), two (8%) Lennox-Gastaut syndrome, and one (4%) West syndrome (all three were drug-resistant)...
June 17, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28632327/photosensitivity-is-an-early-marker-of-neuronal-ceroid-lipofuscinosis-type-2-disease
#11
Nicola Specchio, Marcello Bellusci, Nicola Pietrafusa, Marina Trivisano, Luca de Palma, Federico Vigevano
OBJECTIVE: This study aimed to identify early clinical, magnetic resonance imaging (MRI), and electroencephalographic (EEG) characteristics of neuronal ceroid lipofuscinosis type 2 (CLN2) disease to enable early diagnosis, thus providing the key to early treatment, and optimized care and outcomes. METHODS: Retrospective clinical chart review of a series of patients diagnosed with CLN2 disease from 2005 to 2015 at a single center in Italy. Clinical, MRI, and EEG findings were reviewed...
June 20, 2017: Epilepsia
https://www.readbyqxmd.com/read/28630376/functional-connectivity-disturbances-of-the-ascending-reticular-activating-system-in-temporal-lobe-epilepsy
#12
Dario J Englot, Pierre-Francois D'Haese, Peter E Konrad, Monica L Jacobs, John C Gore, Bassel W Abou-Khalil, Victoria L Morgan
OBJECTIVE: Seizures in temporal lobe epilepsy (TLE) disturb brain networks and lead to connectivity disturbances. We previously hypothesised that recurrent seizures in TLE may lead to abnormal connections involving subcortical activating structures including the ascending reticular activating system (ARAS), contributing to neocortical dysfunction and neurocognitive impairments. However, no studies of ARAS connectivity have been previously reported in patients with epilepsy. METHODS: We used resting-state functional MRI recordings in 27 patients with TLE (67% right sided) and 27 matched controls to examine functional connectivity (partial correlation) between eight brainstem ARAS structures and 105 cortical/subcortical regions...
June 19, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28626979/electro-clinical-criteria-and-surgical-outcome-is-there-a-difference-between-mesial-and-lesional-temporal-lobe-epilepsy
#13
M Wassenaar, F S S Leijten, G-J de Haan, S G Uijl, J W Sander
OBJECTIVES: Mesial temporal lobe epilepsy syndrome (MTLE) with specific electrophysiological and clinical characteristics and hippocampal sclerosis (HS) on MRI is considered the prototype of a syndrome with good surgical prognosis. Ictal onset zones in MTLE have been found to extend outside the hippocampus and neocortical seizures often involve mesial structures. It can, thus, be questioned whether MTLE with HS is different from lesional temporal epilepsies with respect to electro-clinical characteristics and surgical prognosis...
June 18, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28623489/comparing-the-intracarotid-amobarbital-test-and-functional-mri-for-the-presurgical-evaluation-of-language-in-epilepsy
#14
REVIEW
Andreu Massot-Tarrús, Seyed Reza Mousavi, Seyed M Mirsattari
Surgery is the treatment of choice for drug-resistant temporal lobe epilepsy (TLE). However, such surgery frequently causes deficits in language function, especially if performed on the dominant hemisphere. In recent years, the intracarotid amobarbital test (IAT) has been gradually replaced by functional magnetic resonance imaging (fMRI) in the preoperative identification of language areas to estimate the risk of postoperative language decline. In this paper, we review the neural substrates for language processing, how language impairment can result both from TLE itself and from surgical attempts to treat it...
July 2017: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/28623069/neonatal-hypoglycemia-a-wide-range-of-electroclinical-manifestations-and-seizure-outcomes
#15
Ebru Arhan, Zeynep Öztürk, Ayşe Serdaroğlu, Kürşad Aydın, Tuğba Hirfanoğlu, Yılmaz Akbaş
PURPOSE: We examined the various types of epilepsy in children with neonatal hypoglycemia in order to define electroclinical and prognostic features of these patients. METHOD: We retrospectively reviewed the medical records of patients with a history of symptomatic neonatal hypoglycaemia who have been followed at Gazi University Hospital Pediatric Neurology Department between 2006 and 2015. Patients with perinatal asphyxia were excluded. Details of each patient's perinatal history, neurological outcome, epilepsy details, seizure outcome and EEG and brain MRI findings were reviewed...
June 1, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/28622539/features-of-amygdala-in-patients-with-mesial-temporal-lobe-epilepsy-and-hippocampal-sclerosis-an-mri-volumetric-and-histopathological-study
#16
Yoko Nakayama, Hiroshi Masuda, Hiroshi Shirozu, Yosuke Ito, Takefumi Higashijima, Hiroki Kitaura, Yukihiko Fujii, Akiyoshi Kakita, Masafumi Fukuda
OBJECTIVE: It is well-known that there is a correlation between the neuropathological grade of hippocampal sclerosis (HS) and neuroradiological atrophy of the hippocampus in mesial temporal lobe epilepsy (mTLE) patients. However, there is no strict definition or criterion regarding neuron loss and atrophy of the amygdala neighboring the hippocampus. We examined the relationship between HS and neuronal loss in the amygdala. MATERIALS AND METHODS: Nineteen mTLE patients with neuropathological proof of HS were assigned to Group A, while seven mTLE patients without HS were assigned to Group B...
May 22, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28621626/a-multimodal-concept-for-invasive-diagnostics-and-surgery-based-on-neuronavigated-voxel-based-morphometric-mri-postprocessing-data-in-previously-nonlesional-epilepsy
#17
Daniel Delev, Carlos M Quesada, Alexander Grote, Jan P Boström, Christian Elger, Hartmut Vatter, Rainer Surges
OBJECTIVE Diagnosis and surgical treatment of refractory and apparent nonlesional focal epilepsy is challenging. Morphometric MRI voxel-based and other postprocessing methods can help to localize the epileptogenic zone and thereby support the planning of further invasive electroencephalography (EEG) diagnostics, and maybe resective epilepsy surgery. METHODS The authors developed an algorithm to implement regions of interest (ROI), based on postprocessed MRI data, into a neuronavigation tool. This was followed by stereotactic ROI-guided implantation of depth electrodes and ROI-navigated resective surgery...
June 16, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28621621/indications-technique-and-safety-profile-of-insular-stereoelectroencephalography-electrode-implantation-in-medically-intractable-epilepsy
#18
Soha Alomar, Jeffrey P Mullin, Saksith Smithason, Jorge Gonzalez-Martinez
OBJECTIVE Insular epilepsy is relatively rare; however, exploring the insular cortex when preoperative workup raises the suspicion of insular epilepsy is of paramount importance for accurate localization of the epileptogenic zone and achievement of seizure freedom. The authors review their clinical experience with stereoelectroencephalography (SEEG) electrode implantation in patients with medically intractable epilepsy and suspected insular involvement. METHODS A total of 198 consecutive cases in which patients underwent SEEG implantation with a total of 1556 electrodes between June 2009 and April 2013 were reviewed...
June 16, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28620870/severe-growth-deficiency-microcephaly-intellectual-disability-and-characteristic-facial-features-are-due-to-a-homozygous-qars-mutation
#19
Esther Leshinsky-Silver, Jiqiang Ling, Jiang Wu, Chana Vinkler, Keren Yosovich, Sarit Bahar, Miri Yanoov-Sharav, Tally Lerman-Sagie, Dorit Lev
Glutaminyl tRNA synthase is highly expressed in the developing fetal human brain. Mutations in the glutaminyl-tRNA synthetase (QARS) gene have been reported in patients with progressive microcephaly, cerebral-cerebellar atrophy, and intractable seizures. We have previously reported a new recessive syndrome of severe linear growth retardation, poor weight gain, microcephaly, characteristic facial features, cutaneous syndactyly of the toes, high myopia, and intellectual disability in two sisters of Ashkenazi-Jewish origin (Eur J Med Genet 2014;57(6):288-92)...
June 15, 2017: Neurogenetics
https://www.readbyqxmd.com/read/28617386/-l-2-hydroxyglutaric-aciduria-caused-by-a-new-mutation-in-the-l2hgdh-gene
#20
E V Saifullina, E Yu Zakharova, M V Kurkina, R V Magzhanov, E V Gaisina, E N Zakirova
The authors present a case-report of 13 year-old girl with L-2-hydroxyglutaric aciduria [MIM#236792], a rare autosomal/recessive metabolic disorder caused by mutations in the L-encoding 2-hydroxyglutarate dehydrogenase (L2HGDH, 14q21.3). Clinical signs of the disease are presented by predominantly neurological symptoms (epilepsy, cerebellar ataxia, cognitive impairment). The distinctive feature is the specific multifocal lesion of the white matter detected on MRI. The characteristic neuroimaging picture and positive results of biochemical and molecular genetic diagnosis were identified...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
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