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https://www.readbyqxmd.com/read/29155063/technical-note-robotic-guided-bi-hippocampal-and-bi-parahippocampal-depth-placement-for-responsive-neurostimulation-in-bitemporal-lobe-epilepsy
#1
Pratik Rohatgi, Ryan J Jafrani, Nicholas J Brandmeir, Frank G Gilliam, Tiffany L Fisher, Michael D Sather
BACKGROUND: Patients with bitemporal lobe epilepsy are generally not considered for surgical resection. Fortunately, responsive neurostimulation proves another avenue for the management of this challenging disease process. In conjunction with our epileptologist, we consider responsive neurostimulation for patients who have clinical features of temporal lobe epilepsy without clear localization on imaging and stereo-EEG. METHODS: Here we describe our technique for implanting a responsive neurostimulator (NeuroPace, NeuroPace Inc...
November 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29153613/brain-expression-of-inflammatory-mediators-in-mesial-temporal-lobe-epilepsy-patients
#2
Bárbara Leal, João Chaves, Cláudia Carvalho, Rui Rangel, Agostinho Santos, Andreia Bettencourt, João Lopes, João Ramalheira, Berta M Silva, António Martins da Silva, Paulo P Costa
Neuroinflammation may be central in epileptogenesis. In this study we analysed inflammatory reaction markers in brain tissue of Mesial Temporal Lobe Epilepsy with Hippocampal Sclerosis (MTLE-HS) patients. TLR4, IL-1β and IL-10 gene expression as well as the presence of activated HLA-DR+ microglia was evaluated in 23 patients and 10 cadaveric controls. Inflammation characterized by the presence of HLA-DR(+) microglia and TLR4, IL-1β overexpression was evident in hippocampus and anterior temporal cortex of MTLE-HS patients...
December 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29147777/how-i-do-it-selective-amygdalohippocampectomy-via-a-navigated-temporobasal-approach-when-veins-forbid-elevation-of-the-temporal-lobe
#3
Daniel Delev, Johannes Schramm, Hans Clusmann
BACKGROUND: Selective amygdalohippocampectomy is an effective treatment option for mesial temporal lobe epilepsy associated with hippocampal sclerosis. METHODS: To describe and emphasize potential pitfalls during selective amygdalohippocampectomy via a modified navigated temporobasal approach, in cases, where temporal basal veins hinder the required elevation of the temporal lobe. CONCLUSIONS: Selective amygdalohippocampectomy via navigated temporobasal approach is a safe procedure that can reduce the rate of visual field deficits by avoiding damage of optic radiation...
November 16, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29140463/anatomic-investigation-of-the-trajectory-for-stereotactic-laser-amygdalohippocampectomy
#4
Vanessa M Holanda, Abuzer Gungor, Serhat Baydin, Erik H Middlebrooks, Shabbar F Danish
BACKGROUND: Magnetic resonance imaging-guided laser interstitial thermal therapy (LITT) has emerged as a promising treatment for mesial temporal lobe epilepsy. Surgeons must understand the relevant anatomy that is traversed by the catheter and affected by ablation. OBJECTIVE: To study the anatomic structures crossed by the LITT catheter until it reaches the amygdala. METHODS: Three human cadaveric heads were implanted with catheters using a frameless stereotactic technique...
November 11, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29130506/animal-models-of-acquired-epilepsy-insights-into-mechanisms-of-human-epileptogenesis
#5
Albert J Becker
In many patients who suffer from epilepsies, recurrent epileptic seizures do not start at birth but develop later in life. This holds particularly true for epilepsies with a focal seizure origin including focal cortical dysplasias (FCDs) and temporal lobe epilepsy (TLE). TLE most frequently has its seizure onset in the hippocampal formation. Hippocampal biopsies of pharmacoresistant TLE patients undergoing epilepsy surgery for seizure control most frequently reveal the damage pattern of hippocampal sclerosis, i...
November 12, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/29128469/the-different-patterns-of-seizure-induced-aphasia-in-temporal-lobe-epilepsies
#6
Agnès Trebuchon, Isabelle Lambert, Bernard Guisiano, Aileen McGonigal, Charline Perot, Francesca Bonini, Romain Carron, Catherine Liegeois-Chauvel, Patrick Chauvel, Fabrice Bartolomei
OBJECTIVES: Ictal language disturbances may occur in dominant hemisphere temporal lobe epilepsy (TLE), but little is known about the precise anatomoelectroclinical correlations. This study investigated the different facets of ictal aphasia in intracerebrally recorded TLE. METHODS: Video-stereoelectroencephalography (SEEG) recordings of 37 seizures in 17 right-handed patients with drug-resistant TLE were analyzed; SEEG electroclinical correlations between language disturbance and involvement of temporal lobe structures were assessed...
November 8, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29126704/decreased-neurite-density-within-frontostriatal-networks-is-associated-with-executive-dysfunction-in-temporal-lobe-epilepsy
#7
Anny Reyes, Vedang S Uttarwar, Yu-Hsuan A Chang, Akshara R Balachandra, Chris J Pung, Donald J Hagler, Briana M Paul, Carrie R McDonald
OBJECTIVE: Executive dysfunction is observed in a sizable number of patients with refractory temporal lobe epilepsy (TLE). The frontostriatal network has been proposed to play a significant role in executive functioning, however, because of the complex architecture of these tracts, it is difficult to generate measures of fiber tract microstructure using standard diffusion tensor imaging. To examine the association between frontostriatal network compromise and executive dysfunction in TLE, we applied an advanced, multishell diffusion model, restriction spectrum imaging (RSI), that isolates measures of intraaxonal diffusion and may provide better estimates of fiber tract compromise in TLE...
November 8, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29122206/the-evolution-of-accelerated-long-term-forgetting-evidence-from-the-time-study
#8
Sharon Savage, Serge Hoefeijzers, Fraser Milton, Claire Streatfield, Michaela Dewar, Adam Zeman
OBJECTIVE: Accelerated long-term forgetting (ALF) occurs when newly learned information decays faster than normal over extended delays. It has been recognised most frequently in temporal lobe epilepsy, including Transient Epileptic Amnesia (TEA), but can also be drug-induced. Little is known about the evolution of ALF over time and its impacts upon other memory functions, such as autobiographical memory (ABM). Here we investigate the long-term outcome of ALF and ABM in a group of patients with TEA and a single case of baclofen-induced ALF...
October 6, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29120117/is-apolipoprotein-e-%C3%AE%C2%B52-associated-with-delayed-onset-of-non-lesional-temporal-lobe-epilepsy
#9
Davor Sporiš, Silvio Bašić, Jadranka Sertić, Darija Mahović Lakušić, Tomislav Babić
The aim of the study was to evaluate the possible association between Apo E polymorphisms and age at seizure onset in patients with non-lesional temporal lobe epilepsy. Eighty patients with non-lesional temporal lobe epilepsy with or without bilateral tonic-clonic propagation were analyzed. Age at seizure onset was defined as age at the first unequivocal seizure (excluding febrile convulsions). ApoE alleles were determined by a procedure where genome DNA was amplified by chain reaction along with polymerase, using the LightCycler kit (Roche) for ApoE mutations on codons 112 and 158...
March 2017: Acta Clinica Croatica
https://www.readbyqxmd.com/read/29111385/jnk1-inhibition-by-licochalcone-a-leads-to-neuronal-protection-against-excitotoxic-insults-derived-of-kainic-acid
#10
Oriol Busquets, Miren Ettcheto, Ester Verdaguer, Rubén Dario, Carme Auladell, Carlos Beas-Zarate, Jaume Folch, Antoni Camins
The mitogen-activated protein kinase family (MAPK) is an important group of enzymes involved in cellular responses to diverse external stimuli. One of the members of this family is the c-Jun-N-terminal kinase (JNK). The activation of the JNK pathway has been largely associated with the pathogenesis that occurs in epilepsy and neurodegeneration. Kainic acid (KA) administration in rodents is an experimental approach that induces status epilepticus (SE) and replicates many of the phenomenological features of human temporal lobe epilepsy (TLE)...
October 27, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29111296/a-neurosurgeon-s-view-laser-interstitial-thermal-therapy-of-mesial-temporal-lobe-structures
#11
Yarema B Bezchlibnyk, Jon T Willie, Robert E Gross
Stereotactic laser ablation of mesial temporal structures is a promising new surgical intervention for patients with mesial temporal lobe epilepsy (MTLE). Since this procedure was first used to treat MTLE in 2010, the literature contains reports of 37 patients that underwent MR-guided stereotactic laser amygdalohippocampotomy (SLAH) using Laser Interstitial Thermal Therapy (LITT) with at least 1year of follow-up. This early body of data suggests that SLAH is a safe and effective treatment for MTLE in properly selected patients...
October 27, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29107200/the-association-of-psychosocial-variables-with-adherence-to-antiepileptic-drugs-in-patients-with-temporal-lobe-epilepsy
#12
Shan Wang, Cong Chen, Bo Jin, Linglin Yang, Yao Ding, Yi Guo, Yi Chen, Shuang Wang, Meiping Ding
OBJECTIVE: The aim of this study was to explore the association between psychosocial factors and adherence to antiepileptic drugs (AEDs) in patients with temporal lobe epilepsy (TLE). METHODS: This cross-sectional study was conducted with 123 individuals with TLE, admitted to our epilepsy center from December 2015 to May 2017. The participants completed standardized self-report questionnaires measuring medication adherence, anxiety, depression, and family and social support...
October 26, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29105058/verbal-memory-decline-from-hippocampal-depth-electrodes-in-temporal-lobe-surgery-for-epilepsy
#13
Hanna Ljung, Arto Nordlund, Maria Strandberg, Johan Bengzon, Kristina Källén
OBJECTIVE: To explore whether patients with refractory mesial temporal lobe epilepsy risk aggravated verbal memory loss from intracranial electroencephalography (EEG) recording with longitudinal hippocampal electrodes in the language-dominant hemisphere. METHODS: A long-term neuropsychological follow-up (mean 61.5 months, range 22-111 months) was performed in 40 patients after ictal registration with left hippocampal depth electrodes (study group, n = 16) or no invasive EEG, only extracranial registration (reference group, n = 24)...
November 3, 2017: Epilepsia
https://www.readbyqxmd.com/read/29104261/neurochemical-changes-and-c-fos-mapping-in-the-brain-after-carisbamate-treatment-of-rats-subjected-to-lithium-pilocarpine-induced-status-epilepticus
#14
José Eduardo Marques-Carneiro, Astrid Nehlig, Jean-Christophe Cassel, Eduardo Ferreira Castro-Neto, Julia Julie Litzahn, Anne Pereira de Vasconcelos, Maria da Graça Naffah-Mazacoratti, Maria José da Silva Fernandes
The administration of lithium-pilocarpine (LiPilo) in adult rats is a validated model reproducing the main clinical and neuropathological features of temporal lobe epilepsy (TLE). Previous studies have shown that carisbamate (CRS) has the property of modifying epileptogenesis in this model. When treated with CRS, about 50% of rats undergoing LiPilo status epilepticus (SE) develop non-convulsive seizures (NCS) instead of convulsive ones (commonly observed in TLE). The goal of this work was to determine some of the early changes that occur after CRS administration, as they could be involved in the insult- and epileptogenesis-modifying effects of CRS...
November 1, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/29101217/epigenetic-histone-deacetylation-inhibition-prevents-the-development-and-persistence-of-temporal-lobe-epilepsy
#15
Sandesh D Reddy, Bryan C Clossen, Doodipala Samba Reddy
Epilepsy is a chronic brain disease characterized by repeated unprovoked seizures. Currently, no drug therapy exists for curing epilepsy or disease-modification in people at risk. Despite several emerging mechanisms, there have been few studies of epigenetic signaling in epileptogenesis, the process whereby a normal brain becomes progressively epileptic because of precipitating factors. Here, we report a novel role of histone deacetylation as critical epigenetic mechanism in epileptogenesis. Experiments were conducted using the histone deacetylase (HDAC) inhibitor sodium butyrate in the hippocampus kindling model of temporal lobe epilepsy (TLE), a classic model heavily used to approve drugs for treatment of epilepsy...
November 3, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29099058/diverse-effects-of-an-acetylcholinesterase-inhibitor-donepezil-on-hippocampal-neuronal-death-after-pilocarpine-induced-seizure
#16
Jeong Hyun Jeong, Bo Young Choi, A Ra Kho, Song Hee Lee, Dae Ki Hong, Sang Hwon Lee, Sang Yup Lee, Hong Ki Song, Hui Chul Choi, Sang Won Suh
Epileptic seizures are short episodes of abnormal brain electrical activity. Many survivors of severe epilepsy display delayed neuronal death and permanent cognitive impairment. Donepezil is an acetylcholinesterase inhibitor and is an effective treatment agent for Alzheimer's disease. However, the role of donepezil in seizure-induced hippocampal injury remains untested. Temporal lobe epilepsy (TLE) was induced by intraperitoneal injection of pilocarpine (25 mg/kg). Donepezil (2.5 mg/kg/day) was administered by gavage in three different settings: (1) pretreatment for three days before the seizure; (2) for one week immediately after the seizure; and (3) for three weeks from three weeks after the seizure...
November 2, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29097251/fear-conditioned-alterations-of-motor-cortex-excitability-the-role-of-amygdala
#17
Selim Gökdemir, Ayşegül Gündüz, Çiğdem Özkara, Meral E Kızıltan
BACKGROUND AND OBJECTIVE: We hypothesized that fear-conditioning may increase motor cortical excitability in preparation for response to fear. We tested our hypothesis in healthy subjects and in the second step, to determine the role of amygdala in alterations of motor cortex excitability, we included a group of patients who previously underwent unilateral amygdalo-hippocampectomy for temporal lobe epilepsy. PATIENTS AND METHODS: In the first step, we included 16 healthy volunteers...
October 31, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29096220/ear-eeg-detects-ictal-and-interictal-abnormalities-in-focal-and-generalized-epilepsy-a-comparison-with-scalp-eeg-monitoring
#18
I C Zibrandtsen, P Kidmose, C B Christensen, T W Kjaer
OBJECTIVE: Ear-EEG is recording of electroencephalography from a small device in the ear. This is the first study to compare ictal and interictal abnormalities recorded with ear-EEG and simultaneous scalp-EEG in an epilepsy monitoring unit. METHODS: We recorded and compared simultaneous ear-EEG and scalp-EEG from 15 patients with suspected temporal lobe epilepsy. EEGs were compared visually by independent neurophysiologists. Correlation and time-frequency analysis was used to quantify the similarity between ear and scalp electrodes...
October 12, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29094314/volumetric-changes-in-hippocampal-subregions-and-memory-performance-in-mesial-temporal-lobe-epilepsy-with-hippocampal-sclerosis
#19
Caihong Ji, Lujia Zhu, Cong Chen, Shuang Wang, Leilei Zheng, Hong Li
In the present study we explored the different patterns of volumetric atrophy in hippocampal subregions of patients with left and right mesial temporal lobe epilepsy with hippocampal sclerosis (TLE-HS). Meanwhile, the memory impairment patterns in Chinese-speaking TLE-HS patients and potential influencing factors were also determined. TLE-HS patients (21 left and 17 right) and 21 healthy controls were recruited to complete T2-weighted imaging and verbal/nonverbal memory assessment. The results showed that both left and right TLE-HS patients had overall reduced hippocampal subregion volumes on the sclerotic side, and cornu ammonis sectors (CA1) exhibited maximum atrophy...
November 1, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/29093637/structural-and-functional-alterations-at-pre-epileptic-stage-are-closely-associated-with-epileptogenesis-in-pilocarpine-induced-epilepsy-model
#20
Hani Kim, Yunsook Choi, Hye-Young Joung, Yun Seo Choi, Hyeon Jin Kim, Yohan Joo, Jin-Hwan Oh, Hoo Jae Hann, Zang-Hee Cho, Hyang Woon Lee
Pilocarpine-induced rat epilepsy model is an established animal model that mimics medial temporal lobe epilepsy in humans. The purpose of this study was to investigate neuroimaging abnormalities in various stages of epileptogenesis and to correlate them with seizure severity in pilocarpine-induced rat epilepsy model. Fifty male Sprague-Dawley rats were subject to continuous video and electroencephalographic monitoring after inducing status epilepticus (SE) and seizure severity was estimated by frequency and total durations of class 3 to 5 spontaneous recurrent seizures (SRS) by modified Racine's classification...
October 2017: Experimental Neurobiology
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