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Insular epilepsy

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https://www.readbyqxmd.com/read/28796326/gustatory-and-olfactory-responses-to-stimulation-of-the-human-insula
#1
Laure Mazzola, Jean-Pierre Royet, Hélène Catenoix, Alexandra Montavont, Jean Isnard, François Mauguière
OBJECTIVE: Despite numerous studies suggesting the role of insular cortex in the processing of gustatory and olfactory inputs, the exact location of olfacto-gustatory representation in the insula remains controversial. Here we provide a functional mapping of olfactory-gustatory responses to stimulation of the human insular cortex. METHODS: We reviewed 651 electrical stimulations of the insula that were performed in 221 patients, using stereotactically implanted depth electrodes, during the pre-surgical evaluation of drug refractory epilepsy...
August 10, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28762475/behavioral-and-fmri-responses-to-fearful-faces-are-altered-in-benign-childhood-epilepsy-with-centrotemporal-spikes-bcects
#2
Carolina Ciumas, Agathe Laurent, Mani Saignavongs, Faustine Ilski, Julitta de Bellescize, Eleni Panagiotakaki, Karine Ostrowsky-Coste, Alexis Arzimanoglou, Vania Herbillon, Danielle Ibarrola, Philippe Ryvlin
OBJECTIVE: We hypothesized that children with benign childhood epilepsy with centrotemporal spikes (BCECTS) might have altered social cognitive skills and underlying neural networks. METHODS: We studied 13 patients with BCECTS and 11 age-matched controls using event-related functional magnetic resonance imaging (fMRI) with an emotional discrimination task consisting of viewing happy, fearful, scrambled, and neutral faces. Behavioral performance measured during the task was correlated with clinical variables and behavioral ratings...
July 31, 2017: Epilepsia
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/28644202/the-insula-in-temporal-plus-epilepsy
#4
Carmen Barba, Lorella Minotti, Anne-Sophie Job, Philippe Kahane
Temporal lobe epilepsy (TLE) surgery is the most common type of surgical treatment offered to patients with drug-resistant focal seizures. However, the proportion of patients experiencing long-term freedom from seizures after TLE surgery remains suboptimal. Temporal plus epilepsy, which is characterized by a primary temporal epileptogenic zone extending to neighboring regions, has been demonstrated to be a major predictor of TLE surgery failures. In the context of the temporoperisylvian epilepsies, i.e., the most common type of temporal plus epilepsy, a possible role of the insula has often been hypothesized...
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
#5
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/28644200/electrical-stimulations-of-the-human-insula-their-contribution-to-the-ictal-semiology-of-insular-seizures
#6
Laure Mazzola, François Mauguière, Jean Isnard
INTRODUCTION: Stereotactic stimulations of the insular cortex through intracranial electrodes aim at characterizing the semiology of insular seizures. These stimulations, carried out in the context of Stereo-Electro-Encephalography (SEEG) during presurgical monitoring of epilepsy, reproduce the ictal symptoms observed during the development of insular seizures. METHODS: The authors reviewed the results of insular stimulations performed in 222 patients admitted between 1997 and 2015 for presurgical SEEG exploration of atypical temporal or perisylvian epilepsy...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28644198/insular-cortex-epilepsy-exploring-the-treasure-island-of-reil
#7
Dang K Nguyen
No abstract text is available yet for this article.
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28643843/perisylvian-including-insular-childhood-epilepsy-presurgical-workup-and-surgical-outcome
#8
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...
August 2017: Epilepsia
https://www.readbyqxmd.com/read/28630376/functional-connectivity-disturbances-of-the-ascending-reticular-activating-system-in-temporal-lobe-epilepsy
#9
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/28621621/indications-technique-and-safety-profile-of-insular-stereoelectroencephalography-electrode-implantation-in-medically-intractable-epilepsy
#10
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/28600359/ictal-pain-in-focal-non-convulsive-status-epilepticus
#11
Sara Casciato, Alessandra Morano, Jinane Fattouch, Martina Fanella, Mariarita Albini, Anna Teresa Giallonardo, Carlo Di Bonaventura
We report an adult with acute unilateral pain as isolated manifestation of acute symptomatic focal non-convulsive status epilepticus. Pain is rarely a manifestation of epileptic seizures. Traditionally, painful seizures have been thought to originate in either the parietal or temporal lobes, but their localising value is debatable. Recent functional neuroimaging studies and electrophysiological findings obtained by using intracerebral recordings have shown the involvement of the insular cortex along with several other brain structures in the processing of painful inputs, comprising a more widespread anatomo-functional network...
June 9, 2017: Practical Neurology
https://www.readbyqxmd.com/read/28598277/surgical-strategy-to-avoid-ischemic-complications-of-the-pyramidal-tract-in-resective-epilepsy-surgery-of-the-insula-technical-case-report
#12
Naoki Ikegaya, Akio Takahashi, Takanobu Kaido, Yuu Kaneko, Masaki Iwasaki, Nobutaka Kawahara, Taisuke Otsuki
Surgical treatment of the insula is notorious for its high probability of motor complications, particularly when resecting the superoposterior part. Ischemic damage to the pyramidal tract in the corona radiata has been regarded as the cause of these complications, resulting from occlusion of the perforating arteries to the pyramidal tract through the insular cortex. The authors describe a strategy in which a small piece of gray matter is spared at the bottom of the periinsular sulcus, where the perforating arteries pass en route to the pyramidal tract, in order to avoid these complications...
June 9, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28535638/-application-of-long-term-video-electroencephalogram-and-resting-state-functional-magnetic-resonance-imaging-in-detection-of-cognition-in-patients-with-benign-epilepsy-of-childhood-with-centrotemporal-spikes
#13
X X Yan, Q Yu, Y T Gao, L T Li, D H Yu, Y Chen, X J Yao, W D Yang, Z J Chen, J Z Yin, Y An, K Tan
Objective: To study the relationship between the changes of brain network and cognition in patients with benign epilepsy of childhood with centrotemporal spikes (BECTS) by using long term video electroencephalogram (VEEG) and resting-state functional magnetic resonance imaging (RS-fMRI) technology. Methods: Eleven patients with right-handed were recruited (from April 2015 to September 2016) from epilepsy specialist outpatients and functional department of neurosurgery of Tianjin Medical University General Hospital...
May 23, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28520633/insular-cortex-surgery-for-the-treatment-of-refractory-epilepsy
#14
Marec von Lehe, Yaroslav Parpaley
Focal epilepsy originating from the insular cortex is rare. One reason is the small amount of cortical tissue compared with other lobes of the brain. However, the incidence of insular epilepsy might be underestimated because of diagnostic difficulties. The semiology and the surface EEG are often not meaningful or even misleading, and elaborated imaging might be necessary. The close connections of the insular cortex with other potentially epileptogenic areas, such as the temporal lobe or frontal/central cortex, is increasingly recognized as possible reason for failure of epilepsy surgery for temporal or extratemporal seizures...
July 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28520631/operculo-insular-epilepsy-scalp-and-intracranial-electroencephalographic-findings
#15
Ariel Levy, Thi Phuoc Yen Tran, Olivier Boucher, Alain Bouthillier, Dang Khoa Nguyen
PURPOSE: Operculo-insular seizures are heterogeneous and may resemble seizures originating from the temporal, frontal, or parietal lobe. Although surface and invasive EEG recordings are often necessary to detect operculo-insular seizures, electrophysiological features of operculo-insular epilepsies remain poorly characterized. This study describes the EEG findings of patients with operculo-insular epilepsy. METHODS: We reviewed electrophysiological data of all patients (n = 9) with operculo-insular seizures revealed by intracranial EEG and for whom operculo-insular epilepsy was confirmed by good seizure outcome after resective or radiosurgery at our center between 2005 and 2013...
May 16, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28506485/surgery-for-dysembryoplastic-neuroepithelial-tumors-and-gangliogliomas-in-eloquent-areas-functional-results-and-seizure-control
#16
B Devaux, F Chassoux, E Landré, B Turak, A Laurent, M Zanello, C Mellerio, P Varlet
INTRODUCTION: Dysembryoplastic neuroepithelial tumors and gangliogliomas are developmental glioneuronal tumors usually revealed by partial epilepsy. High epileptogenicity, childhood epilepsy onset, drug-resistance, temporal location, and seizure freedom after complete resection are common characteristics of both tumors. We report the specificity of surgical management, functional results and seizure outcome in cases of a tumor location in eloquent areas. METHODS: Among 150 patients (88 males, 3-55 years) operated on for refractory epilepsy due to a glioneuronal tumor (1990-2015), 30 (20%, dysembryoplastic neuroepithelial tumors=21; gangliogliomas=9) had a tumor located in an eloquent cortex (sensory-motor, insular or language areas)...
June 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28449635/seizure-control-and-memory-impairment-are-related-to-disrupted-brain-functional-integration-in-temporal-lobe-epilepsy
#17
Chang-Hyun Park, Yun Seo Choi, A-Reum Jung, Hwa-Kyoung Chung, Hyeon Jin Kim, Jeong Hyun Yoo, Hyang Woon Lee
Brain functional integration can be disrupted in patients with temporal lobe epilepsy (TLE), but the clinical relevance of this disruption is not completely understood. The authors hypothesized that disrupted functional integration over brain regions remote from, as well as adjacent to, the seizure focus could be related to clinical severity in terms of seizure control and memory impairment. Using resting-state functional MRI data acquired from 48 TLE patients and 45 healthy controls, the authors mapped functional brain networks and assessed changes in a network parameter of brain functional integration, efficiency, to examine the distribution of disrupted functional integration within and between brain regions...
April 28, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28444426/investigation-of-altered-microstructure-in-patients-with-drug-refractory-epilepsy-using-diffusion-tensor-imaging
#18
Yuwei Jiang, Lingyan Mao, Xu Yan, Mingxia Fan, Xin Wang, Jing Ding, Dongrong Xu
PURPOSE: The risk of refractory epilepsy can be more dangerous than the adverse effect caused by medical treatment. In this study, we employed voxel-wise analysis (VWA) and tract-based spatial statistics (TBSS) methods to measure microstructural changes using diffusion tensor imaging (DTI) in patients of drug refractory epilepsy (DRE) who had been epileptic for more than 10 years. METHODS: To examine the specific microstructural abnormalities in DRE patients and its difference from medically controlled epilepsy (MCE), we acquired DTI data of 7 DRE patients, 37 MCE patients, and 31 healthy controls (HCs) using a 3 T MRI scanner...
April 25, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28434623/does-unilateral-insular-resection-disturb-personality-a-study-with-epileptic-patients
#19
Benjamin Hébert-Seropian, Olivier Boucher, Carole Sénéchal, Isabelle Rouleau, Alain Bouthillier, Franco Lepore, Dang Khoa Nguyen
The insula is now regarded as a potential site of epileptogenesis in drug-resistant epilepsy, and the advent of microsurgical techniques has allowed insular cortectomy to become a treatment of choice when the insular cortex is involved in the seizure focus. However, considering the evidence of an insular role in socio-emotional processing, it remains unknown whether these cortical resections disturb personality and social behavior as experienced in daily life. We examined such changes in a group of patients (n=19) who underwent epilepsy surgery involving partial or complete resection of the insula, and compared them to a group of patients who underwent standard temporal lobe epilepsy (TLE) surgery (n=19) as a lesion-control group...
April 20, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28419357/stereoelectroencephalography-using-magnetic-resonance-angiography-for-avascular-trajectory-planning-technical-report
#20
Krasimir Minkin, Kaloyan Gabrovski, Marin Penkov, Yuri Todorov, Rositsa Tanova, Yoana Milenova, Kiril Romansky, Petia Dimova
BACKGROUND: Stereoelectroencephalography (SEEG) requires high-quality angiographic studies because avascular trajectory planning is a prerequisite for the safety of this procedure. Some epilepsy surgery groups have begun to use computed tomography angiography and magnetic resonance T1-weighted sequence with contrast enhancement for this purpose. OBJECTIVE: To present the first series of patients with avascular trajectory planning of SEEG based on magnetic resonance angiography (MRA)...
April 13, 2017: Neurosurgery
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