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https://www.readbyqxmd.com/read/28794979/identification-of-the-epileptogenic-zone-of-temporal-lobe-epilepsy-from-stereo-electroencephalography-signals-a-phase-transfer-entropy-and-graph-theory-approach
#1
Meng-Yang Wang, Jing Wang, Jian Zhou, Yu-Guang Guan, Feng Zhai, Chang-Qing Liu, Fei-Fei Xu, Yi-Xian Han, Zhao-Fen Yan, Guo-Ming Luan
The aim of this research is to apply an approach based on phase transfer entropy (PTE) and graph theory to study the interactions between the stereo-electroencephalography (SEEG) activities recorded in multilobar origin, in order to evaluate their ability to detect the epileptogenic zone (EZ) of temporal lobe epilepsies (TLE). Forty-three patients were included in this retrospective study. Five to sixteen (median = 12) multilead electrodes were implanted per patient, and, for each patient, a sub-set of between 10 and 32 (median = 22) bipolar derivations was selected for analysis...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28768920/neuronavigation-guided-frameless-stereoelectroencephalography-seeg
#2
Ayataka Fujimoto, Tohru Okanishi, Sotaro Kanai, Keishiro Sato, Mitsuyo Nishimura, Hideo Enoki
Stereoelectroencephalography (SEEG) is an invasive surgical procedure used to identify epileptogenic zones. The combination of both subdural grids and depth electrodes (DEs) is currently used for invasive intracranial monitoring in many epilepsy centers. To perform DE implantation, some centers use frame-based stereotactic techniques and others use stereotactic robotic techniques. However, not all epilepsy centers have access to these tools. We hypothesized that DE implantation using a neuronavigation system can be utilized for subsequent epilepsy surgery...
August 1, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28710548/retrospective-evaluation-and-seeg-trajectory-analysis-for-interactive-multi-trajectory-planner-assistant
#3
Davide Scorza, Elena De Momi, Lisa Plaino, Gaetano Amoroso, Gabriele Arnulfo, Massimo Narizzano, Luis Kabongo, Francesco Cardinale
PURPOSE: Focal epilepsy is a neurological disease that can be surgically treated by removing area of the brain generating the seizures. The stereotactic electroencephalography (SEEG) procedure allows patient brain activity to be recorded in order to localize the onset of seizures through the placement of intracranial electrodes. The planning phase can be cumbersome and very time consuming, and no quantitative information is provided to neurosurgeons regarding the safety and efficacy of their trajectories...
July 14, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28709879/the-neural-bases-of-ictal-tachycardia-in-temporal-lobe-seizures
#4
Florian Chouchou, Romain Bouet, Vincent Pichot, Hélène Catenoix, François Mauguière, Julien Jung
OBJECTIVE: Due to limited information from scalp electroencephalographic (EEG) recordings, brain areas driving changes in cardiac rhythm during Temporal lobe (TL) seizures are not clearly identified. Using stereotactic EEG (SEEG) recordings, we aimed at identifying which of the brain regions involved in autonomic control trigger ictal tachycardia. METHODS: The neural activity of several mesial temporal lobe structures including amygdala, hippocampus, insula, and lateral temporal lobe recorded with SEEG were collected during 37 TL seizures in 9 patients, using indices based on High Frequency Activity (HFA)...
June 27, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28705474/rf-ablation-in-periventricular-heterotopia-related-epilepsy
#5
Massimo Cossu, Laura Mirandola, Laura Tassi
Drug-resistant focal epilepsy is a common occurrence in patients with gray matter nodular heterotopia (NH), and surgical treatment is often considered in these cases. NH-related epileptogenicity is sustained by complex networks, which may involve the nodules and extralesional cortex in various combinations. Therefore, invasive EEG is usually required to identify the structures involved in seizure generation. It has been reported that surgery may be effective in cases with unilateral lesions, whereas bilateral cases are not optimal candidates for surgical success...
July 3, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28676892/methodology-outcome-safety-and-in-vivo-accuracy-in-traditional-frame-based-stereoelectroencephalography
#6
Lars E van der Loo, Olaf E M G Schijns, Govert Hoogland, Albert J Colon, G Louis Wagner, Jim T A Dings, Pieter L Kubben
BACKGROUND: Stereoelectroencephalography (SEEG) is an established diagnostic technique for the localization of the epileptogenic zone in drug-resistant epilepsy. In vivo accuracy of SEEG electrode positioning is of paramount importance since higher accuracy may lead to more precise resective surgery, better seizure outcome and reduction of complications. OBJECTIVE: To describe experiences with the SEEG technique in our comprehensive epilepsy center, to illustrate surgical methodology, to evaluate in vivo application accuracy and to consider the diagnostic yield of SEEG implantations...
July 5, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28673029/predictive-factors-of-surgical-outcome-in-frontal-lobe-epilepsy-explored-with-stereoelectroencephalography
#7
Francesca Bonini, Aileen McGonigal, Didier Scavarda, Romain Carron, Jean Régis, Henry Dufour, Jean-Claude Péragut, Virginie Laguitton, Nathalie Villeneuve, Patrick Chauvel, Bernard Giusiano, Agnès Trébuchon, Fabrice Bartolomei
BACKGROUND: Resective surgery established treatment for pharmacoresistant frontal lobe epilepsy (FLE), but seizure outcome and prognostic indicators are poorly characterized and vary between studies. OBJECTIVE: To study long-term seizure outcome and identify prognostic factors. METHODS: We retrospectively analyzed 42 FLE patients having undergone surgical resection, mostly preceded by invasive recordings with stereoelectroencephalography (SEEG)...
June 29, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28664416/a-surgical-robot-with-augmented-reality-visualization-for-stereoelectroencephalography-electrode-implantation
#8
Bowei Zeng, Fanle Meng, Hui Ding, Guangzhi Wang
PURPOSE: Using existing stereoelectroencephalography (SEEG) electrode implantation surgical robot systems, it is difficult to intuitively validate registration accuracy and display the electrode entry points (EPs) and the anatomical structure around the electrode trajectories in the patient space to the surgeon. This paper proposes a prototype system that can realize video see-through augmented reality (VAR) and spatial augmented reality (SAR) for SEEG implantation. The system helps the surgeon quickly and intuitively confirm the registration accuracy, locate EPs and visualize the internal anatomical structure in the image space and patient space...
August 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28644200/electrical-stimulations-of-the-human-insula-their-contribution-to-the-ictal-semiology-of-insular-seizures
#9
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/28643843/perisylvian-including-insular-childhood-epilepsy-presurgical-workup-and-surgical-outcome
#10
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/28637943/stereoelectroencephalography-indication-and-efficacy
#11
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/28621621/indications-technique-and-safety-profile-of-insular-stereoelectroencephalography-electrode-implantation-in-medically-intractable-epilepsy
#12
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/28591482/hypothalamic-hamartoma-epileptogenesis-beyond-the-lesion
#13
REVIEW
Julia Scholly, Anke Maren Staack, Philippe Kahane, Didier Scavarda, Jean Régis, Edouard Hirsch, Fabrice Bartolomei
The discovery of intrinsic epileptogenicity of the hypothalamic hamartoma (HH) marked a new area in understanding the associated clinical syndrome, often manifesting as progressive epileptic encephalopathy. However, therapeutic procedures targeting the HH proved to be inefficient to cure seizures in up to 50% of cases, whereas in cases with partial improvement, the electroclinical patterns of persisting seizures suggest an involvement of distant cortical regions. The concept of kindling-like secondary epileptogenesis has been suggested as a possible underlying mechanism...
June 2017: Epilepsia
https://www.readbyqxmd.com/read/28591055/stereoelectroencephalography-based-on-the-leksell-stereotactic-frame-and-neurotech-operation-planning-software
#14
Guangming Zhang, Guoqiang Chen, Dawei Meng, Yanwu Liu, Jianwei Chen, Lanmei Shu, Wenbo Liu
This study aimed to introduce a new stereoelectroencephalography (SEEG) system based on Leksell stereotactic frame (L-SEEG) as well as Neurotech operation planning software, and to investigate its safety, applicability, and reliability.L-SEEG, without the help of navigation, includes SEEG operation planning software (Neurotech), Leksell stereotactic frame, and corresponding surgical instruments. Neurotech operation planning software can be used to display three-dimensional images of the cortex and cortical vessels and to plan the intracranial electrode implantation...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28543030/defining-epileptogenic-networks-contribution-of-seeg-and-signal-analysis
#15
REVIEW
Fabrice Bartolomei, Stanislas Lagarde, Fabrice Wendling, Aileen McGonigal, Viktor Jirsa, Maxime Guye, Christian Bénar
Epileptogenic networks are defined by the brain regions involved in the production and propagation of epileptic activities. In this review we describe the historical, methodologic, and conceptual bases of this model in the analysis of electrophysiologic intracerebral recordings. In the context of epilepsy surgery, the determination of cerebral regions producing seizures (i.e., the "epileptogenic zone") is a crucial objective. In contrast with a traditional focal vision of focal drug-resistant epilepsies, the concept of epileptogenic networks has been progressively introduced as a model better able to describe the complexity of seizure dynamics and realistically describe the distribution of epileptogenic anomalies in the brain...
July 2017: Epilepsia
https://www.readbyqxmd.com/read/28491494/the-relationship-between-morphological-lesion-magnetic-source-imaging-and-intracranial-stereo-electroencephalography-in-focal-cortical-dysplasia
#16
Romain Bouet, François Mauguière, Sébastien Daligault, Jean Isnard, Marc Guenot, Olivier Bertrand, Julien Jung
Magnetoencephalography (MEG) is a useful non-invasive technique for presurgical evaluation of focal cortical dysplasia patients. We aimed at clarifying the precise spatial relationship between the spiking volume determined with MEG, the seizure onset zone and the lesional volume in patients with focal cortical dysplasia. We studied the spatial relationships between the MEG spiking volume determined with a recent analysis pipeline, the seizure-onset zone location determined with a quantitative index calculated from intracranial EEG signals ('Epileptogenicity Index') and the lesional volume delineated on brain MRI in 11 patients with Focal Cortical Dysplasia explored with Stereo-electroencephalography (SEEG)...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28482271/usefulness-of-stereoeeg-based-tailored-surgery-for-medial-temporal-lobe-epilepsy-preliminary-results-in-11-patients
#17
Yuichi Kubota, Taku Ochiai, Tomokatsu Hori, Takakazu Kawamata
OBJECTIVE: Surgical options for medial temporal lobe epilepsy (MTLE) include anterior temporal lobectomy (ATL) and selective amygdalohippocampectomy (SAH). Optimal criteria for choosing the appropriate surgical approach remain uncertain. This article reports 11 consecutive cases in which electrophysiological findings of stereoelectroencephalography (SEEG) were used to determine the optimal surgical approach. PATIENTS AND METHODS: Eleven consecutive patients with MTLE underwent SEEG evaluation and were placed in either the medial or the medial+lateral group based on the findings...
July 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28464799/erratum-to-ipsiversive-ictal-eye-deviation-in-inferioposterior-temporal-lobe-epilepsy-two-seeg-cases-report
#18
Wei Zhang, Xingzhou Liu, Lijun Zuo, Qiang Guo, Qi Chen, Yongjun Wang
No abstract text is available yet for this article.
May 2, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28463615/a-new-tool-for-touch-free-patient-registration-for-robot-assisted-intracranial-surgery-application-accuracy-from-a-phantom-study-and-a-retrospective-surgical-series
#19
Francesco Cardinale, Michele Rizzi, Piergiorgio d'Orio, Giuseppe Casaceli, Gabriele Arnulfo, Massimo Narizzano, Davide Scorza, Elena De Momi, Michele Nichelatti, Daniela Redaelli, Maurizio Sberna, Alessio Moscato, Laura Castana
OBJECTIVE The purpose of this study was to compare the accuracy of Neurolocate frameless registration system and frame-based registration for robotic stereoelectroencephalography (SEEG). METHODS The authors performed a 40-trajectory phantom laboratory study and a 127-trajectory retrospective analysis of a surgical series. The laboratory study was aimed at testing the noninferiority of the Neurolocate system. The analysis of the surgical series compared Neurolocate-based SEEG implantations with a frame-based historical control group...
May 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28426130/length-of-stay-for-patients-undergoing-invasive-electrode-monitoring-with-stereoelectroencephalography-and-subdural-grids-correlates-positively-with-increased-institutional-profitability
#20
COMPARATIVE STUDY
Alvin Y Chan, Sohayla Kharrat, Kelly Lundeen, Lilit Mnatsakanyan, Mona Sazgar, Indranil Sen-Gupta, Jack J Lin, Frank P K Hsu, Sumeet Vadera
OBJECTIVE: Lowering the length of stay (LOS) is thought to potentially decrease hospital costs and is a metric commonly used to manage capacity. Patients with epilepsy undergoing intracranial electrode monitoring may have longer LOS because the time to seizure is difficult to predict or control. This study investigates the effect of economic implications of increased LOS in patients undergoing invasive electrode monitoring for epilepsy. METHODS: We retrospectively collected and analyzed patient data for 76 patients who underwent invasive monitoring with either subdural grid (SDG) implantation or stereoelectroencephalography (SEEG) over 2 years at our institution...
June 2017: Epilepsia
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