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https://www.readbyqxmd.com/read/29316270/robot-guided-stereoelectroencephalography-without-a-computed-tomography-scan-for-referencing-analysis-of-accuracy
#1
Andrea Spyrantis, Adriano Cattani, Adam Strzelczyk, Felix Rosenow, Volker Seifert, Thomas M Freiman
OBJECTIVE: Recent studies with robot-guided stereotaxy use computed tomography (CT) scans for referencing. We will provide evidence that using preoperative MRI datasets referenced with a laser scan of the patient's face is sufficient for sEEG implantation. METHODS: In total, 40 sEEG electrodes were implanted in five patients by the robotic surgical assistant (ROSA). The postoperative CT scan for identifying electrode positions was fused with the preoperative MRI-based planning data...
January 8, 2018: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/29289424/french-guidelines-on-stereoelectroencephalography-seeg-editorial-comment
#2
EDITORIAL
Patrick Chauvel, Sylvain Rheims, Aileen McGonigal, Philippe Kahane
No abstract text is available yet for this article.
December 27, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29289423/interpretation-of-seeg-recordings
#3
REVIEW
Fabrice Bartolomei, Anca Nica, Maria Paola Valenti-Hirsch, Claude Adam, Marie Denuelle
The interpretation of SEEG recordings is a crucial step. It must be carried out by an epileptologist/neurophysiologist with sufficient training and qualification in this field. The objectives of the interpretation are to define the brain topography of interictal activities (irritative zone) and the epileptogenic zone, defined as the site of primary organization of ictal discharges. Several patterns of seizure onset are possible, the most typical including fast discharges. The interpretation of the SEEG is based on the recording of spontaneous activity but also on the results of intracerebral electrical stimulation...
December 27, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29277357/french-guidelines-on-stereoelectroencephalography-seeg
#4
REVIEW
Jean Isnard, Delphine Taussig, Fabrice Bartolomei, Pierre Bourdillon, Hélène Catenoix, Francine Chassoux, Mathilde Chipaux, Stéphane Clémenceau, Sophie Colnat-Coulbois, Marie Denuelle, Stéphane Derrey, Bertrand Devaux, Georg Dorfmüller, Vianney Gilard, Marc Guenot, Anne-Sophie Job-Chapron, Elisabeth Landré, Axel Lebas, Louis Maillard, Aileen McGonigal, Lorella Minotti, Alexandra Montavont, Vincent Navarro, Anca Nica, Nicolas Reyns, Julia Scholly, Jean-Christophe Sol, William Szurhaj, Agnès Trebuchon, Louise Tyvaert, Maria Paola Valenti-Hirsch, Luc Valton, Jean-Pierre Vignal, Paul Sauleau
Stereoelectroencephalography (SEEG) was designed and developed in the 1960s in France by J. Talairach and J. Bancaud. It is an invasive method of exploration for drug-resistant focal epilepsies, offering the advantage of a tridimensional and temporally precise study of the epileptic discharge. It allows anatomo-electrical correlations and tailored surgeries. Whereas this method has been used for decades by experts in a limited number of European centers, the last ten years have seen increasing worldwide spread of its use...
December 22, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29273384/surgical-technique
#5
REVIEW
Marc Guénot, Axel Lebas, Bertrand Devaux, Sophie Colnat-Coulbois, Georg Dorfmuller, Aileen McGonigal, Nicolas Reyns, Vianney Gilard, Stéphane Derrey, Jean-Christophe Sol, Stéphane Clémenceau
In SEEG, as for any surgical procedure, the benefit/risk ratio is a key-point. This implies rigorous clinical practice in terms of indication, information delivered to the patient, and surgical technique. Numerous technical options may be used to achieve this goal. All are valuable, as long as they are executed with rigor and consistency. Intracranial bleeding represents the main risk of the procedure (1-4% of cases). The procedure also carries a risk of infection (0.8%), death (total of 6 reported cases in all the literature, <0...
December 19, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29273383/seeg-guided-radiofrequency-thermocoagulation
#6
REVIEW
Pierre Bourdillon, Bertrand Devaux, Anne-Sophie Job-Chapron, Jean Isnard
We propose expert recommendations on the use of SEEG-guided radiofrequency thermocoagulation (RF-TC) based on an exhaustive literature review. This technique consists in performing a RF-TC lesion using a SEEG depth electrode at the end of the recording. It is indicated when conventional surgical resection of the ictal onset zone is not possible. SEEG guided RF-TC can also be considered as a diagnostic tool since an improvement, even limited, has a high positive predictive value concerning the good outcome after surgery...
December 19, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29244226/high-frequency-oscillations-are-not-better-biomarkers-of-epileptogenic-tissues-than-spikes
#7
Nicolas Roehri, Francesca Pizzo, Stanislas Lagarde, Isabelle Lambert, Anca Nica, Aileen McGonigal, Bernard Giusiano, Fabrice Bartolomei, Christian-George Bénar
OBJECTIVE: High-frequency oscillations (HFOs) in intracerebral EEG (stereoelectroencephalography, SEEG) are considered as better biomarkers of epileptogenic tissues than spikes. How this can be applied at the patient level remains poorly understood. We investigated how well the HFOs and the spikes can predict epileptogenic regions with a large spatial sampling at the patient level. METHODS: We analyzed non-REM sleep SEEG recordings sampled at 2,048Hz of thirty patients...
December 15, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/29243976/stereotactic-eeg-via-multiple-single-path-omnidirectional-trajectories-within-a-single-platform-institutional-experience-with-a-novel-technique
#8
Michael C Dewan, Robert Shults, Andrew T Hale, Vishad Sukul, Dario J Englot, Peter Konrad, Hong Yu, Joseph S Neimat, William Rodriguez, Benoit M Dawant, Srivatsan Pallavaram, Robert P Naftel
OBJECTIVE Stereotactic electroencephalography (SEEG) is being used with increasing frequency to interrogate subcortical, cortical, and multifocal epileptic foci. The authors describe a novel technique for SEEG in patients with suspected epileptic foci refractory to medical management. METHODS In the authors' technique, standard epilepsy evaluation and neuroimaging are used to create a hypothesis-driven SEEG plan, which informs the 3D printing of a novel single-path, multiple-trajectory, omnidirectional platform...
December 15, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29225615/epileptic-seizure-prediction-using-csp-and-lda-for-scalp-eeg-signals
#9
Turky N Alotaiby, Saleh A Alshebeili, Faisal M Alotaibi, Saud R Alrshoud
This paper presents a patient-specific epileptic seizure predication method relying on the common spatial pattern- (CSP-) based feature extraction of scalp electroencephalogram (sEEG) signals. Multichannel EEG signals are traced and segmented into overlapping segments for both preictal and interictal intervals. The features extracted using CSP are used for training a linear discriminant analysis classifier, which is then employed in the testing phase. A leave-one-out cross-validation strategy is adopted in the experiments...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/29205292/brain-regions-and-epileptogenicity-influence-epileptic-interictal-spike-production-and-propagation-during-nrem-sleep-in-comparison-with-wakefulness
#10
Isabelle Lambert, Nicolas Roehri, Bernard Giusiano, Romain Carron, Fabrice Wendling, Christian Benar, Fabrice Bartolomei
OBJECTIVE: Non-rapid eye movement (NREM) sleep is known to be a brain state associated with an activation of interictal epileptic activity. The goal of this work was to quantify topographic changes occurring during NREM sleep in comparison with wakefulness. METHOD: We studied intracerebral recordings of 20 patients who underwent stereo-electroencephalography (SEEG) during presurgical evaluation for pharmacoresistant focal epilepsy. We measured the number of interictal spikes (IS) and quantified the co-occurrence of IS between brain regions during 1 hour of NREM sleep and 1 hour of wakefulness...
December 3, 2017: Epilepsia
https://www.readbyqxmd.com/read/29175567/flat-detector-computed-tomography-for-evaluation-of-intracerebral-vasculature-for-planning-of-stereoelectroencephalography-electrode-implantation
#11
Richard F Schmidt, Michael J Lang, Christian M Hoelscher, Pascal M Jabbour, Stavropoula I Tjoumakaris, Ashwini D Sharan, Chengyuan Wu
OBJECTIVE: Stereoelectroencephalography (sEEG) requires extensive preoperative planning to optimize placement of electrodes and limit the potential for complications. Flat-detector computed tomography (FD-CT) has previously been used for peri-operative vascular imaging to guide the treatment of vascular lesions. This imaging modality provides a detailed depiction of cerebrovascular and bony cranial anatomy, which can be used to guide intracranial electrode implantation. We have developed a novel method to improve preoperative planning for sEEG electrode implantation and limit the potential for postoperative complications by using FD-CT imaging merged with preoperative magnetic resonance imaging...
November 22, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29162522/loss-of-consciousness-is-related-to-hyper-correlated-gamma-band-activity-in-anesthetized-macaques-and-sleeping-humans
#12
Michał Bola, Adam B Barrett, Andrea Pigorini, Lino Nobili, Anil K Seth, Artur Marchewka
Loss of consciousness can result from a wide range of causes, including natural sleep and pharmacologically induced anesthesia. Important insights might thus come from identifying neuronal mechanisms of loss and re-emergence of consciousness independent of a specific manipulation. Therefore, to seek neuronal signatures of loss of consciousness common to sleep and anesthesia we analyzed spontaneous electrophysiological activity recorded in two experiments. First, electrocorticography (ECoG) acquired from 4 macaque monkeys anesthetized with different anesthetic agents (ketamine, medetomidine, propofol) and, second, stereo-electroencephalography (sEEG) from 10 epilepsy patients in different wake-sleep stages (wakefulness, NREM, REM)...
November 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/29143307/considerations-in-performing-and-analyzing-the-responses-of-cortico-cortical-evoked-potentials-in-stereo-eeg
#13
REVIEW
David Prime, David Rowlands, Steven O'Keefe, Sasha Dionisio
This review aims to highlight key considerations when performing cortico-cortical evoked potentials (CCEPs) using stereo-electroencephalography (SEEG) for network mapping and show its clinical applicability to presurgical evaluations. The parameters for performing stimulation and safety aspects have been investigated in electrocorticography (ECoG) and deep brain stimulation (DBS), but not as extensively in SEEG. A review of current literature was performed, with an attempt made to emphasize practical insights from all modalities of intracranial stimulation...
November 16, 2017: Epilepsia
https://www.readbyqxmd.com/read/29128469/the-different-patterns-of-seizure-induced-aphasia-in-temporal-lobe-epilepsies
#14
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...
January 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29125946/a-stereo-eeg-study-in-a-patient-with-sleep-related-hypermotor-epilepsy-due-to-depdc5-mutation
#15
Lorenzo Ferri, Francesca Bisulli, Roberto Mai, Laura Licchetta, Chiara Leta, Lino Nobili, Barbara Mostacci, Tommaso Pippucci, Paolo Tinuper
PURPOSE: Dishevelled EGL-10 and pleckstrin domain-containing protein 5 (DEPDC5) mutations are found in a wide spectrum of focal epilepsies ranging from epilepsy caused by malformation of cortical development to non-lesional epilepsy, including sleep-related hypermotor epilepsy (SHE). A surgical approach has been anecdotally reported in patients with DEPDC5 mutations, but most of these cases had a lesional etiology. METHODS: We describe a stereo-EEG (SEEG) study in a patient with drug-resistant/non-lesional SHE...
November 4, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29117337/seeg-is-a-safe-procedure-for-a-comprehensive-anatomic-exploration-of-the-insula-a-retrospective-study-of-108-procedures-representing-254-transopercular-insular-electrodes
#16
Anne Laure Salado, Laurent Koessler, Gabriel De Mijolla, Emmanuelle Schmitt, Jean-Pierre Vignal, Thierry Civit, Louise Tyvaert, Jacques Jonas, Louis Georges Maillard, Sophie Colnat- Coulbois
BACKGROUND: The exploration of the insula in pre-surgical evaluation of epilepsy is considered to be associated with a high vascular risk resulting in an incomplete exploration of the insular cortex. OBJECTIVE: To report a retrospective observational study of insular exploration using stereoelectroencephalography (sEEG) with transopercular and parasagittal oblique intracerebral electrodes from January 2008 to January 2016. The first purpose of this study was to evaluate the surgical risks of insular cortex sEEG exploration...
May 9, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29111409/mulan-evaluation-and-ensemble-statistical-inference-for-functional-connectivity
#17
Huifang E Wang, Karl J Friston, Christian G Bénar, Marmaduke M Woodman, Patrick Chauvel, Viktor Jirsa, Christophe Bernard
Many analysis methods exist to extract graphs of functional connectivity from neuronal networks. Confidence in the results is limited because, (i) different methods give different results, (ii) parameter setting directly influences the final result, and (iii) systematic evaluation of the results is not always performed. Here, we introduce MULAN (MULtiple method ANalysis), which assumes an ensemble based approach combining multiple analysis methods and fuzzy logic to extract graphs with the most probable structure...
October 27, 2017: NeuroImage
https://www.readbyqxmd.com/read/29076417/epilepsy-and-neurosurgery-historical-highlights
#18
Marianna Karamanou, Gregory Tsoucalas, Marios Themistocleous, Dimitrios Giakoumettis, George Stranjalis, George Androutsos
Epilepsy has been known since antiquity and trepanation has been documented as a therapeutic option. The Greek born physician Aretaeus of Cappadocia (2nd century BC) was the first to recommend trepanation for the treatment of refractory epilepsy to drugs, pointing out the efficacy of the method. Trepanation was practiced throughout the Middle Ages, as it is proved by the book of "Quattuor Magistri" and during Renaissance as well. In 19th century, Sir Victor Alexander Horsley (1857-1916), combining analysis of clinical presentation with cortical stimulation, performed a series of craniotomies for the treatment of epilepsy...
October 24, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29060677/localization-of-stereo-electroencephalography-signals-using-a-finite-difference-complete-electrode-model
#19
Damon E Hyde, Xavier Tomas-Fernandez, Scellig S Stone, Jurriaan Peters, Simon K Warfield
Surgical intervention in epilepsy aims to eliminate seizures in refractory patients by resecting the tissue responsible for seizure onset. Stereo-electroencephalography (sEEG) provides highly accurate but invasive electrophysiological measurements using narrow multi-contact electrodes implanted stereotactically through small holes in the skull. However, the three dimensional nature of sEEG measurements make observed seizure onsets difficult to associate with physical cortical regions. Three dimensional source localization from sEEG measurements can improve the interpretation of this data, but requires more accurate modeling as compared to localization from scalp EEG...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060612/nonmotor-regions-encode-path-related-information-during-movements
#20
Macauley S Breault, Pierre Sacre, Jacob J Johnson, Matthew Kerr, Matthew D Johnson, Juan Bulacio, Jorge Gonzalez-Martinez, Sridevi V Sarma, John T Gale
Sensorimotor control and the involvement of motor brain regions has been extensively studied, but the role nonmotor brain regions play during movements has been overlooked. This is particularly due to the difficulty of recording from multiple regions in the brain during motor control. In this study, we utilize stereoelectroencephalography (SEEG) recording techniques to explore the role nonmotor brain areas have on the way we move. Nine humans were implanted with SEEG depth electrodes for clinical purposes, which rendered access to local field potential (LFP) activity in deep and peripheral nonmotor structures...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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