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https://www.readbyqxmd.com/read/28334078/relationships-between-morphologic-and-functional-patterns-in-the-polymicrogyric-cortex
#1
Matteo Lenge, Carmen Barba, Domenico Montanaro, Gayane Aghakhanyan, Francesca Frijia, Renzo Guerrini
Polymicrogyria is a malformation of cortical folding and layering underlying different cognitive and neurological manifestations. The polymicrogyric cortex has heterogeneous morphofunctional patterns, qualitatively described at magnetic resonance imaging (MRI) by variable severity gradients and functional activations. We investigated the link between abnormal cortical folding and cortical function in order to improve surgical planning for patients with polymicrogyria and intractable epilepsy. We performed structural and functional MRI on 14 patients with perisylvian polymicrogyria and adopted surface-based methods to detect alterations of cortical thickness (CT) and local gyrification index (LGI) compared with normal cortex (30 age-matched subjects)...
February 18, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28325891/whole-exome-sequencing-identifies-a-novel-de-novo-mutation-in-dync1h1-in-epileptic-encephalopathies
#2
Zhongdong Lin, Zhenwei Liu, Xiucui Li, Feng Li, Ying Hu, Bingyu Chen, Zhen Wang, Yong Liu
Epileptic encephalopathies (EE) are a group of severe childhood epilepsy disorders characterized by intractable seizures, cognitive impairment and neurological deficits. Recent whole-exome sequencing (WES) studies have implicated significant contribution of de novo mutations to EE. In this study, we utilized WES for identifying causal de novo mutations in 4 parent-offspring trios affected by West syndrome. As a result, we found two deleterious de novo mutations in DYNC1H1 and RTP1 in two trios. Expression profile analysis showed that DYNC1H1 and RTP1 are expressed in almost all brain regions and developmental stages...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28324765/hd-tdcs-in-refractory-lateral-frontal-lobe-epilepsy-patients
#3
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/28322026/objective-3d-surface-evaluation-of-intracranial-electrophysiologic-correlates-of-cerebral-glucose-metabolic-abnormalities-in-children-with-focal-epilepsy
#4
Jeong-Won Jeong, Eishi Asano, Vinod Kumar Pilli, Yasuo Nakai, Harry T Chugani, Csaba Juhász
To determine the spatial relationship between 2-deoxy-2[(18) F]fluoro-D-glucose (FDG) metabolic and intracranial electrophysiological abnormalities in children undergoing two-stage epilepsy surgery, statistical parametric mapping (SPM) was used to correlate hypo- and hypermetabolic cortical regions with ictal and interictal electrocorticography (ECoG) changes mapped onto the brain surface. Preoperative FDG-PET scans of 37 children with intractable epilepsy (31 with non-localizing MRI) were compared with age-matched pseudo-normal pediatric control PET data...
March 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28319873/magnetoencephalography-with-temporal-spread-imaging-to-visualize-propagation-of-epileptic-activity
#5
Sumiya Shibata, Masao Matsuhashi, Takeharu Kunieda, Yukihiro Yamao, Rika Inano, Takayuki Kikuchi, Hisaji Imamura, Shigetoshi Takaya, Riki Matsumoto, Akio Ikeda, Ryosuke Takahashi, Tatsuya Mima, Hidenao Fukuyama, Nobuhiro Mikuni, Susumu Miyamoto
OBJECTIVE: We describe temporal spread imaging (TSI) that can identify the spatiotemporal pattern of epileptic activity using Magnetoencephalography (MEG). METHODS: A three-dimensional grid of voxels covering the brain is created. The array-gain minimum-variance spatial filter is applied to an interictal spike to estimate the magnitude of the source and the time (Ta) when the magnitude exceeds a predefined threshold at each voxel. This calculation is performed through all spikes...
January 30, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28318972/persistent-single-neuron-activity-during-working-memory-in-the-human-medial-temporal-lobe
#6
Simon Kornblith, Rodrigo Quian Quiroga, Christof Koch, Itzhak Fried, Florian Mormann
Working memory is an essential component of human cognition. Persistent activity related to working memory has been reported in many brain areas, including the inferior temporal and prefrontal cortex [1-8]. The medial temporal lobe (MTL) contains "concept cells" that respond invariantly to specific individuals or places whether presented as images, text, or speech [9, 10]. It is unknown, however, whether the MTL also participates in working memory processes. We thus sought to determine whether human MTL neurons respond to images held in working memory...
March 15, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28315444/directional-spread-of-activity-in-synaptic-networks-of-the-human-lateral-amygdala
#7
Stéphanie Graebenitz, Manuela Cerina, Jörg Lesting, Olga Kedo, Ali Gorji, Heinz Pannek, Volkmar Hans, Karl Zilles, Hans-Christian Pape, Erwin-Josef Speckmann
Spontaneous epileptiform activity has previously been observed in lateral amygdala (LA) slices derived from patients with intractable-temporal lobe epilepsy. The present study aimed to characterize intranuclear LA synaptic connectivity and to test the hypothesis that differences in the spread of flow of neuronal activity may relate to spontaneous epileptiform activity occurrence. Electrical activity was evoked through electrical microstimulation in acute human brain slices containing the LA, signals were recorded as local field potentials combined with fast optical imaging of voltage-sensitive dye fluorescence...
March 14, 2017: Neuroscience
https://www.readbyqxmd.com/read/28302192/-surgery-for-pediatric-intractable-epilepsy-due-to-posterior-quadrantic-cortical-dysplasia
#8
Qing-Zhu Liu, Li-Xin Cai, Xiao-Yan Liu, Yu-Wu Jiang, Shuang Wang, Tao-Yun Ji, Wen Wang, Wei-Ke Cheng, Ruo-Fan Wang
OBJECTIVE: To investigate the clinical features and surgical strategy for pediatric intractable epilepsy due to posterior quadrantic cortical dysplasia and to assess the surgical outcomes. METHODS: The clinical features and preoperative evaluation results of 14 children with intractable epilepsy due to posterior quadrantic cortical dysplasia were retrospectively analyzed. The localization values of video-electroencephalography and intraoperative monitoring and the indications, advantages and disadvantages of temporoparietooccipital disconnection were evaluated...
March 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28291425/long-term-outcomes-of-epilepsy-surgery-in-85-pediatric-patients-followed-up-for-over-10-years-a-retrospective-survey
#9
Hiroshi Hosoyama, Kazumi Matsuda, Tadahiro Mihara, Naotaka Usui, Koichi Baba, Yushi Inoue, Takayasu Tottori, Toshiaki Otsubo, Yumi Kashida, Koji Iida, Hirofumi Hirano, Ryosuke Hanaya, Kazunori Arita
OBJECTIVE The aim of this study was to investigate the treatment outcomes and social engagement of patients who had undergone pediatric epilepsy surgery more than 10 years earlier. METHODS Between 1983 and 2005, 110 patients younger than 16 years underwent epilepsy surgery at the National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders. The authors sent a questionnaire to 103 patients who had undergone follow-up for more than 10 years after surgery; 85 patients (82.5%) responded. The survey contained 4 categories: seizure outcome, use of antiepileptic drugs, social participation, and general satisfaction with the surgical treatment (resection of the epileptic focus, including 4 hemispherectomies)...
March 3, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28287070/coregistration-of-multimodal-imaging-is-associated-with-favourable-two-year-seizure-outcome-after-paediatric-epilepsy-surgery
#10
Michael Scott Perry, Laurie Bailey, Daniel Freedman, David Donahue, Saleem Malik, Hayden Head, Cynthia Keator, Angel Hernandez
Multimodal coregistration uses multiple image datasets coregistered to an anatomical reference (i.e. MRI), allowing multiple studies to be viewed together. Commonly used in intractable epilepsy evaluation and generally accepted to improve localization of the epileptogenic zone, data showing that coregistration improves outcome is lacking. We compared seizure freedom following epilepsy surgery in paediatric patients, evaluated before and after the use of coregistration protocols at our centre, to determine whether this correlated with a change in outcome...
March 8, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28284049/significance-of-mdr1-gene-c3435t-polymorphism-in-predicting-childhood-refractory-epilepsy
#11
Rui-Juan Lv, Xiao-Qiu Shao, Tao Cui, Qun Wang
The association between the MDR1 gene C3435T polymorphism and childhood intractable epilepsy remains controversial. In this study, we performed a meta-analysis to clarify this issue. We searched the PubMed, Medline, Embase and CNKI databases for studies published through October 2016 that evaluated the association between the MDR1 C3435T polymorphism and childhood refractory epilepsy. Eleven studies involving 863 cases in the group with drug-resistant epilepsy and 915 cases in the group with drug-responsive epilepsy were included in this systematic review and meta-analysis...
February 28, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28284046/breaking-the-cycle-a-comparison-between-intravenous-immunoglobulins-and-high-dosage-prednisone-in-the-treatment-of-medically-intractable-epilepsy-in-children
#12
Richard Tang-Wai, Janette Mailo, Bernard Rosenblatt
PURPOSE: Because immune mediated mechanisms are suspected in epileptogenesis, IVIg and corticosteroids have been used as alternatives to treat refractory seizures. We present our experience treating intractable epileptic children with IVIg and prednisone. METHODS: Children with intractable epilepsy treated with prednisone or IVIg between 2005-2016 were reviewed retrospectively. Children with infantile spasms and autoimmune epilepsy were excluded. Data analyzed include epilepsy type and etiology, duration of epilepsy prior to treatment, seizure outcome, time to best seizure outcome, and adverse effects...
March 6, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28270747/metabolic-dysfunction-underlying-autism-spectrum-disorder-and-potential-treatment-approaches
#13
REVIEW
Ning Cheng, Jong M Rho, Susan A Masino
Autism spectrum disorder (ASD) is characterized by deficits in sociability and communication, and increased repetitive and/or restrictive behaviors. While the etio-pathogenesis of ASD is unknown, clinical manifestations are diverse and many possible genetic and environmental factors have been implicated. As such, it has been a great challenge to identify key neurobiological mechanisms and to develop effective treatments. Current therapies focus on co-morbid conditions (such as epileptic seizures and sleep disturbances) and there is no cure for the core symptoms...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28261083/automatic-and-precise-localization-and-cortical-labeling-of-subdural-and-depth-intracranial-electrodes
#14
Chaoyi Qin, Zheng Tan, Yali Pan, Yanyan Li, Lin Wang, Liankun Ren, Wenjing Zhou, Liang Wang
Object: Subdural or deep intracerebral electrodes are essential in order to precisely localize epileptic zone in patients with medically intractable epilepsy. Precise localization of the implanted electrodes is critical to clinical diagnosing and treatment as well as for scientific studies. In this study, we sought to automatically and precisely extract intracranial electrodes using pre-operative MRI and post-operative CT images. Method: The subdural and depth intracranial electrodes were readily detected using clustering-based segmentation...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/28258205/the-role-of-radionuclide-imaging-in-epilepsy-part-1-sporadic-temporal-and-extratemporal-lobe-epilepsy
#15
REVIEW
Ajay Kumar, Harry T Chugani
Epilepsy is one of the most common yet diverse neurologic disorders, affecting almost 1%-2% of the population. Presently, radionuclide imaging such as PET and SPECT is not used in the primary diagnosis or evaluation of recent-onset epilepsy. However, it can play a unique and important role in certain specific situations, such as in noninvasive presurgical localization of epileptogenic brain regions in intractable-seizure patients being considered for epilepsy surgery. Radionuclide imaging can be particularly useful if MR imaging is either negative for lesions or shows several lesions of which only 1 or 2 are suspected to be epileptogenic and if electroencephalogram changes are equivocal or discordant with the structural imaging...
March 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/28245538/-improvement-in-hyperglysemia-following-unilateral-adrenalectomy-for-acth-independent-macronodular-adrenal-hyperplasia-aimah-a-case-report
#16
Junichi Ikeda, Kouei Muguruma, Takaaki Inoue, Teruhisa Nishida, Shigenari Kawakita, Takashi Murota, Haruyuki Ohsugi, Nae Takizawa, Hidefumi Kinoshita, Tadashi Matsuda, Amika Noda, Keita Utsunomiya
Adrenal corticotropin (ACTH) -independent macronodular adrenal hyperplasia (AIMAH) is a rare cause of Cushing's syndrome. Bilateral adrenalectomy is the treatment of choice, but lifetime steroid replacement is essential. Here we report a case of AIMAH whose hyperglycemia was improved following unilateral adrenalectomy. A 42-year-old woman with serious intellectual disability and intractable epilepsy presented with polydipsia. Casual blood glucose and hemoglobin A1c (HbA1c) were 322 mg/dl and 8.5%, respectively...
January 2017: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/28242475/importance-of-neuropsychological-and-clinical-features-to-predict-seizure-control-in-medically-treated-patients-with-mesial-temporal-epilepsy-and-hippocampal-sclerosis
#17
Laia Grau-López, Marta Jiménez, Jordi Ciurans, Cynthia Cáceres, Juan Luis Becerra
OBJECTIVE: It is not yet understood why seizures in certain patients with mesial temporal lobe epilepsy and hippocampal sclerosis (MTLE-HS) develop resistance to antiepileptic drugs (AEDs) while others achieve good seizure control with this treatment. We analyzed clinical and neuropsychological features associated with seizure control in patients with MTLE-HS who had not undergone resective surgery. METHODS: We enrolled 40 patients with medically treated MTLE-HS and retrospectively collected the following data from prospective databases: sex, febrile seizures, central nervous system infection, history of head trauma, cognitive impairment, psychiatric disturbances, history of status epilepticus, age at onset of epilepsy, aura, seizure type and frequency, electroencephalography abnormalities, HS side, AEDs, global cognitive status, and neuropsychological functions such as cognitive processing speed, attention and executive functions, verbal and visual memory, language, and visuospatial ability...
February 24, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28238621/psychiatric-and-behavioral-side-effects-of-anti-epileptic-drugs-in-adolescents-and-children-with-epilepsy
#18
B Chen, K Detyniecki, H Choi, L Hirsch, A Katz, A Legge, R Wong, A Jiang, R Buchsbaum, P Farooque
PURPOSE: The objective of the study was to compare the psychiatric and behavioral side effect (PBSE) profiles of both older and newer antiepileptic drugs (AEDs) in children and adolescent patients with epilepsy. METHOD: We used logistic regression analysis to test the correlation between 83 non-AED/patient related potential predictor variables and the rate of PBSE. We then compared for each AED the rate of PBSEs and the rate of PBSEs that led to intolerability (IPBSE) while controlling for non-AED predictors of PBSEs...
February 14, 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/28237833/stable-psychological-functioning-after-surgery-for-epilepsy-an-informant-based-perspective
#19
Marcie L King, Daniel Tranel
OBJECTIVE: Psychological adjustment following surgery for epilepsy has been assessed primarily with self-report measures. In the current work, we investigated pre- to postoperative changes in various dimensions of personality and behavior from the perspective of a well-known family member or friend for 27 patients operated on for medically intractable epilepsy. METHODS: For each patient, a close family member or friend ("informant") provided pre- and postoperative ratings on five dimensions of personality and behavior...
February 23, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28237414/visual-function-twenty-years-after-childhood-hemispherectomy-for-intractable-epilepsy
#20
Sian E Handley, Faraneh Vargha-Khadem, Richard J Bowman, Alki Liasis
PURPOSE: To investigate visual function in adults post hemispherectomy in childhood. DESIGN: Non-comparative case series. METHODS: All participants underwent visual acuity, binocular function, visual field, optical coherence tomography (OCT) of the retinal nerve fiber layer (RNFL), and monocular pattern reversal visually evoked potentials (prVEP). PARTICIPANTS: 6 adults who had a hemispherectomy in childhood (median 21...
February 22, 2017: American Journal of Ophthalmology
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