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amygdala and temporal lobe epilepsy

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https://www.readbyqxmd.com/read/29649646/simultaneous-treatment-of-epilepsy-and-secondary-dystonia-after-anterior-temporal-lobectomy-and-amygdalohippocampectomy
#1
Lily Rasouli, Jonathan J Rasouli, Fedor Panov, Ji Yeoun Yoo, Patricia E McGoldrick, Saadi Ghatan
BACKGROUND: The relationship between temporal lobe epilepsy and focal limb dystonia is a well-recognized phenomenon, yet its pathogenesis and anatomical foundation are not well understood. Here, we describe two patients with refractory focal epilepsy and contralateral focal limb dystonia whose seizures and dystonic symptoms simultaneously resolved after anterior temporal lobectomy and amygdalohippocampectomy (ATLAH). CASE DESCRIPTION: We identified two patients within the Mount Sinai Health system with improvement in dystonia after medial temporal lobectomy...
April 9, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29620625/decreased-functional-connectivity-and-structural-deficit-in-alertness-network-with-right-sided-temporal-lobe-epilepsy
#2
Yujun Gao, Jinou Zheng, Yaping Li, Danni Guo, Mingli Wang, Xiangxiang Cui, Wei Ye
Patients with temporal lobe epilepsy (TLE) often suffer from alertness alterations. However, specific regions connected with alertness remain controversial, and whether these regions have structural impairment is also elusive. This study aimed to investigate the characteristics and neural mechanisms underlying the functions and structures of alertness network in patients with right-sided temporal lobe epilepsy (rTLE) by performing the attentional network test (ANT), resting-state functional magnetic resonance imaging (R-SfMRI), and diffusion tensor imaging (DTI)...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29593628/gray-matter-and-white-matter-abnormalities-in-temporal-lobe-epilepsy-patients-with-and-without-hippocampal-sclerosis
#3
Iman Beheshti, Daichi Sone, Farnaz Farokhian, Norihide Maikusa, Hiroshi Matsuda
The presentation and distribution of gray matter (GM) and white matter (WM) abnormalities in temporal lobe epilepsy (TLE) have been widely studied. Here, we investigated the GM and WM abnormalities in TLE patients with and without hippocampal sclerosis (HS) in five groups of participants: healthy controls (HCs) ( n  = 28), right TLE patients with HS ( n  = 26), right TLE patients without HS ( n  = 30), left TLE patients with HS ( n  = 25), and left TLE patients without HS ( n  = 27). We performed a flexible factorial statistical test in a whole-brain voxel-based morphometry analysis to identify significant GM and WM abnormalities and analysis of variance of hippocampal and amygdala regions among the five groups using the FreeSurfer procedure...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29572865/hippocampal-subfield-segmentation-in-temporal-lobe-epilepsy-relation-to-outcomes
#4
B A K Kreilkamp, B Weber, S B Elkommos, M P Richardson, S S Keller
OBJECTIVE: To investigate the clinical and surgical outcome correlates of preoperative hippocampal subfield volumes in patients with refractory temporal lobe epilepsy (TLE) using a new magnetic resonance imaging (MRI) multisequence segmentation technique. METHODS: We recruited 106 patients with TLE and hippocampal sclerosis (HS) who underwent conventional T1-weighted and T2 short TI inversion recovery MRI. An automated hippocampal segmentation algorithm was used to identify twelve subfields in each hippocampus...
March 23, 2018: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/29570385/stereotactic-laser-ablation-of-amygdala-and-hippocampus-using-a-leksell-stereotactic-frame
#5
Ahmed J Awad, Ha S Nguyen, Elsa Arocho-Quinones, Ninh Doan, Wade Mueller, Sean M Lew
Approximately one-third of patients with epilepsy are resistant to medical therapy, particularly in those with mesial temporal lobe epilepsy. While there are several surgical modalities, efforts have been focused on developing safer and minimally invasive techniques. In this video, the authors present the case of a 45-year-old woman with a 2-year history of refractory left mesial temporal lobe epilepsy who underwent MRI-guided laser ablation of amygdala and hippocampus. There were no perioperative complications...
April 2018: Neurosurgical Focus
https://www.readbyqxmd.com/read/29534399/-microsurgical-treatment-of-temporal-cavernous-malformation-presenting-with-epilepsy
#6
F Wang, D N Feng, Y Liu, Z Liu, T Sun
Objective: To evaluate the efficacy and safety of microsurgical in the treatment of temporal lobe cerebral cavernous malformation (CCM) with epilepsy. Methods: Temporal lobe CCM patients with epilepsy admitted to our department were collected from January 2010 to September 2016. Locations of the CCM were divided into (1) lateral-lateral to the collateral sulcus; (2) mesial-mesial to the collateral sulcus. In the lateral group, patients were underwent intraoperative electrocorticography (ECoG)-guided resection of lesion and hemosiderin rim...
March 6, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29528488/automated-trajectory-planning-for-laser-interstitial-thermal-therapy-in-mesial-temporal-lobe-epilepsy
#7
Vejay N Vakharia, Rachel Sparks, Kuo Li, Aidan G O'Keeffe, Anna Miserocchi, Andrew W McEvoy, Michael R Sperling, Ashwini Sharan, Sebastien Ourselin, John S Duncan, Chengyuan Wu
OBJECTIVE: Surgical resection of the mesial temporal structures brings seizure remission in 65% of individuals with drug-resistant mesial temporal lobe epilepsy (MTLE). Laser interstitial thermal therapy (LiTT) is a novel therapy that may provide a minimally invasive means of ablating the mesial temporal structures with similar outcomes, while minimizing damage to the neocortex. Systematic trajectory planning helps ensure safety and optimal seizure freedom through adequate ablation of the amygdalohippocampal complex (AHC)...
March 12, 2018: Epilepsia
https://www.readbyqxmd.com/read/29524710/technical-modification-of-amygdalo-hippocampectomy-in-temporal-lobe-epilepsy-surgery-to-further-reduce-severe-neurological-complications-a-clinical-anatomical-study
#8
Karl Roessler, Burkhard S Kasper, Roland Coras, Soheil Arinrad, Michael Scholz, Hajo H Hamer, Ingmar Blümcke, Michael Buchfelder
BACKGROUND: Temporal lobe resection (TLR) including amygdalohippocampectomy (AHE) is the most frequent performed procedure in epilepsy surgery. Owing to the close anatomic relationship of the mesial temporal structures and the midbrain and choroidal fissure, the incidence of severe complications, such as postoperative stroke, is as high as 2.5%. METHODS: We developed a modification of the classical technique for AHE that involves entering the choroidal fissure early via the anterior part of the frontomesial temporal horn cleft to identify the crus cerebri, posterior cerebri artery, and oculomotor nerve...
March 7, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29475601/accelerated-long-term-forgetting-in-focal-epilepsies-with-special-consideration-given-to-patients-with-diagnosed-and-suspected-limbic-encephalitis
#9
Christoph Helmstaedter, Babette Winter, Nico Melzer, Hubertus Lohmann, Juri-Alexander Witt
RATIONALE: Accelerated long-term forgetting (ALF) is a phenomenon found in late onset epilepsy and in transient epileptic amnesia (TEA). Here we evaluated ALF in patients with focal epilepsies and limbic encephalitis (LE) in particular. METHODS: ALF was assessed in 36 patients with focal epilepsy and 154 healthy subjects using an extended version of the Verbal Learning and Memory Test (VLMT), with free recall after 30 min and again after one week. From these patients, 89% had temporal lobe epilepsy; 42% left-lateralized; 39% right; 19% bilateral; 17% were diagnosed with hippocampal sclerosis; 64% displayed features indicating LE; 52% with amygdala pathology, and 61% were antibody positive...
January 31, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29420859/amygdala-stimulation-induced-apnea-is-attention-and-nasal-breathing-dependent
#10
William P Nobis, Stephen Schuele, Jessica W Templer, Guangyu Zhou, Gregory Lane, Joshua M Rosenow, Christina Zelano
OBJECTIVE: Evidence suggests disordered breathing is critically involved in Sudden unexplained death in epilepsy (SUDEP). To that end, evaluating structures that are activated by seizures and can activate brain regions that produce cardiorespiratory changes can further our understanding of the pathophysiology of SUDEP. Prior preclinical studies have shown that electrical stimulation of the human amygdala induces apnea, suggesting a role for the amygdala in controlling respiration. In this study, we aimed to both confirm these findings in a larger group of patients with intractable temporal lobe epilepsy (TLE) and also further explore the anatomical and cognitive properties of this effect...
February 8, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29317669/selective-targeting-of-scn8a-prevents-seizure-development-in-a-mouse-model-of-mesial-temporal-lobe-epilepsy
#11
Jennifer C Wong, Christopher D Makinson, Tyra Lamar, Qi Cheng, Jeffrey C Wingard, Ernest F Terwilliger, Andrew Escayg
We previously found that genetic mutants with reduced expression or activity of Scn8a are resistant to induced seizures and that co-segregation of a mutant Scn8a allele can increase survival and seizure resistance of Scn1a mutant mice. In contrast, Scn8a expression is increased in the hippocampus following status epilepticus and amygdala kindling. These findings point to Scn8a as a promising therapeutic target for epilepsy and raise the possibility that aberrant overexpression of Scn8a in limbic structures may contribute to some epilepsies, including temporal lobe epilepsy...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317322/flashbulb-memories-is-the-amygdala-central-an-investigation-of-patients-with-amygdalar-damage
#12
Kerstin Spanhel, Kathrin Wagner, Maximilian J Geiger, Isabell Ofer, Andreas Schulze-Bonhage, Birgitta Metternich
Flashbulb memories (FM) are a subgroup of autobiographical memories referring to the circumstances in which a person first heard of a surprising, emotionally arousing event. Patients with temporal lobe epilepsy (TLE) have been reported to be impaired in FM recall. As emotional arousal is central to FM, various authors have suggested a crucial role of the amygdala. However, to date, no studies have directly addressed this hypothesis. In this study, 33 TLE patients and 20 healthy controls (HC) were tested on an FM task twice with a minimum interval of two months...
March 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29289531/epileptic-seizures-are-reduced-by-autonomic-biofeedback-therapy-through-enhancement-of-fronto-limbic-connectivity-a-controlled-trial-and-neuroimaging-study
#13
Yoko Nagai, Julia Aram, Matthias Koepp, Louis Lemieux, Marco Mula, Hugo Critchley, Sanjay Sisodiya, Mara Cercignani
BACKGROUND: Thirty-percent of patients with epilepsy are drug-resistant, and might benefit from effective noninvasive therapeutic interventions. Evidence is accumulating on the efficacy of autonomic biofeedback therapy using galvanic skin response (GSR; an index of sympathetic arousal) in treating epileptic seizures. This study aimed to extend previous controlled clinical trials of autonomic biofeedback therapy with a larger homogeneous sample of patients with temporal lobe epilepsy. In addition, we used neuroimaging to characterize neural mechanisms of change in seizure frequency following the therapy...
January 2018: EBioMedicine
https://www.readbyqxmd.com/read/29275328/systematic-review-of-structural-and-functional-brain-alterations-in-psychosis-of-epilepsy
#14
REVIEW
James Allebone, Richard Kanaan, Sarah J Wilson
This systematic review critically assesses structural and functional neuroimaging studies of psychosis of epilepsy (POE). We integrate findings from 18 studies of adults with POE to examine the prevailing view that there is a specific relationship between temporal lobe epilepsy (TLE) and POE, and that mesial temporal lobe pathology is a biomarker for POE. Our results show: (1) conflicting evidence of volumetric change in the hippocampus and amygdala; (2) distributed structural pathology beyond the mesial temporal lobe; and (3) changes in frontotemporal functional network activation...
December 23, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29223539/losartan-suppresses-the-kainate-induced-changes-of-angiotensin-at-1-receptor-expression-in-a-model-of-comorbid-hypertension-and-epilepsy
#15
Dimitrinka Atanasova, Jana Tchekalarova, Natasha Ivanova, Zlatina Nenchovska, Ekaterina Pavlova, Nina Atanassova, Nikolai Lazarov
AIMS: Experimental and clinical studies have demonstrated that components of renin-angiotensin system are elevated in the hippocampus in epileptogenic conditions. In the present work, we explored the changes in the expression of angiotensin II receptor, type 1 (AT1 receptor) in limbic structures, as well as the effect of the AT1 receptor antagonist losartan in a model of comorbid hypertension and epilepsy. MAIN METHODS: The expression of AT1 receptors was compared between spontaneously hypertensive rats (SHRs) and Wistar rats by using immunohistochemistry in the kainate (KA) model of temporal lobe epilepsy (TLE)...
January 15, 2018: Life Sciences
https://www.readbyqxmd.com/read/29210066/the-interictal-mesial-temporal-lobe-epilepsy-network
#16
Suganya Karunakaran, Matthew J Rollo, Kamin Kim, Jessica A Johnson, Giridhar P Kalamangalam, Behnaam Aazhang, Nitin Tandon
OBJECTIVE: Identification of patient-specific epileptogenic networks is critical to designing successful treatment strategies. Multiple noninvasive methods have been used to characterize epileptogenic networks. However, these methods lack the spatiotemporal resolution to allow precise localization of epileptiform activity. We used intracranial recordings, at much higher spatiotemporal resolution, across a cohort of patients with mesial temporal lobe epilepsy (MTLE) to delineate features common to their epileptogenic networks...
January 2018: Epilepsia
https://www.readbyqxmd.com/read/29205291/interactive-effects-of-seizure-frequency-and-lateralization-on-intratemporal-effective-connectivity-in-temporal-lobe-epilepsy
#17
Chang-Hyun Park, Yun Seo Choi, Hyeon Jin Kim, Hwa-Kyung Chung, A-Reum Jung, Jeong Hyun Yoo, Hyang Woon Lee
OBJECTIVE: Patients with temporal lobe epilepsy (TLE) show brain connectivity changes in association with cognitive impairment. Seizure frequency and lateralization are 2 important clinical factors that characterize epileptic seizures. In this study, we sought to examine an interactive effect of the 2 seizure factors on intratemporal effective connectivity based on resting-state functional magnetic resonance imaging (rsfMRI) in patients with TLE. METHODS: For rsfMRI data acquired from 48 TLE patients and 45 healthy controls, we applied stochastic dynamical causal modeling to infer effective connectivity between 3 medial temporal lobe (MTL) regions, including the hippocampus (Hipp), parahippocampal gyrus (PHG), and amygdala (Amyg), ipsilateral to the seizure focus...
January 2018: Epilepsia
https://www.readbyqxmd.com/read/29186594/resection-of-temporal-neocortex-during-multiple-hippocampal-transections-for-mesial-temporal-lobe-epilepsy-does-not-affect-seizure-or-memory-outcome
#18
Fady Girgis, Madeline E Greil, Philip S Fastenau, Jennifer Sweet, Hans Lüders, Jonathan P Miller
BACKGROUND: Multiple hippocampal transection (MHT) is a surgical treatment for mesial temporal lobe epilepsy associated with improved postoperative neuropsychological outcomes compared with lobectomy. OBJECTIVE: To determine whether resection of the amygdala and anterior temporal neocortex during MHT affects postoperative seizure/memory outcome. METHODS: Seventeen patients with normal magnetic resonance imaging and stereo-electroencephalogram-proven drug-resistant dominant mesial temporal lobe epilepsy were treated with MHT...
December 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29175724/a-right-amygdalohippocampectomy-a-diagnostic-challenge
#19
Frank Jonker, Cees Jonker, Laura Bronzwaer, Erik Scherder
OBJECTIVE: Amygdalohippocampectomy (AHE) is the resective surgery for medically intractable mesial temporal lobe epilepsy. To date no study has investigated a wide range of neuropsychiatric symptoms in right AHE outpatients. PATIENTS AND METHODS: Three patients with right AHE participated in this study. The control group are patients with cognitive complaints with no history of epilepsy or neurological impairment and no structural abnormalities on the MRI/CT. We expected no difference in verbal memory compared to the controls...
January 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29175574/surgical-management-and-long-term-seizure-outcome-after-surgery-for-temporal-lobe-epilepsy-associated-with-cerebral-cavernous-malformations
#20
Peng-Fan Yang, Jia-Sheng Pei, Yan-Zeng Jia, Qiao Lin, Hui Xiao, Ting-Ting Zhang, Zhong-Hui Zhong
OBJECTIVE: Operative strategies for cerebral cavernous malformation (CCM)-associated temporal lobe epilepsy and timing of surgical intervention continue to be debated. This study aimed to establish an algorithm to evaluate the efficacy of surgical intervention strategies, to maximize positive surgical outcomes and minimize postsurgical neurologic deficits. METHODS: 47 patients having undergone operation for CCM-associated temporal lobe epilepsy were retrospectively reviewed...
February 2018: World Neurosurgery
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