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https://www.readbyqxmd.com/read/29145186/the-kl%C3%A3-ver-bucy-syndrome
#1
Douglas J Lanska
In 1937, Heinrich Klüver and Paul Bucy described a dramatic behavioral syndrome in monkeys after bilateral temporal lobectomy. The full Klüver-Bucy syndrome (KBS) - hyperorality, placidity, hypermetamorphosis, dietary changes, altered sexual behavior, and visual agnosia - is evident within 3 weeks following operation. Some KBS features (i.e., hyperorality, placidity, hypermetamorphosis) persist indefinitely, whereas others gradually resolve over several years. Klüver and Bucy were initially unaware of an earlier report of KBS by Sanger Brown and Edward Schäfer in 1888...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29137921/intraoperative-definition-of-bottom-of-sulcus-dysplasia-using-intraoperative-ultrasound-and-single-depth-electrode-recording-a-technical-note
#2
Dorothea Miller, Patrick Carney, John S Archer, Gregory J Fitt, Graeme D Jackson, Kristian J Bulluss
Bottom of sulcus dysplasias (BOSDs) are localized focal cortical dysplasias (FCDs) centred on the bottom of a sulcus that can be highly epileptogenic, but difficult to delineate intraoperatively. We report on a patient with refractory epilepsy due to a BOSD, successfully resected with the aid of a multimodal surgical approach using neuronavigation based on MRI and PET, intraoperative ultrasound (iUS) and electrocorticography (ECoG) using depth electrodes. The lesion could be visualized on iUS showing an increase in echogenicity at the grey-white matter junction...
November 11, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29137065/primary-leiomyosarcoma-of-the-bone-a-case-report-and-a-review-of-the-literature
#3
Federica Recine, Alberto Bongiovanni, Roberto Casadei, Federica Pieri, Nada Riva, Alessandro De Vita, Laura Mercatali, Chiara Liverani, Chiara Spadazzi, Giacomo Miserocchi, Valentina Fausti, Dino Amadori, Toni Ibrahim
RATIONALE: Leiomyosarcoma (LMS) is a malignant sarcoma that can occur in different anatomic sites, including the bone, showing similar histological characteristics but heterogeneous clinical behavior and prognosis. Primary bone LMS was first described in 1965. It is a very rare sarcoma, accounting for <0.7% of all primary malignant bone tumors. PATIENT CONCERNS: We report the case of a 52-year-old male with primary bone LMS who presented with a solitary osteolytic lesion with focal cortical destruction in the left clavicle, seen on an x-ray and subsequent computed tomography (CT) scan...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29127654/the-endoscope-assisted-contralateral-paramedian-approach-to-large-falcine-meningiomas
#4
Florian Roser, Luigi Rigante
BACKGROUND: Resection of large falcine meningiomas can be challenging as overlaying cortical brain is endangered during the surgical approach. METHOD: We describe the endoscope-assisted contralateral paramedian approach to large left-falcine meningiomas to avoid retraction of the ipsilateral thin layer of eloquent brain cortex. CONCLUSIONS: The contralateral paramedian approach enables complete tumor resection with endoscopic-assisted removal of tumor remnants in the superior aspect of the resection cavity, sparing any manipulation of ipsilateral brain tissue...
November 10, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29122369/preserved-metacognitive-ability-despite-unilateral-or-bilateral-anterior-prefrontal-resection
#5
Anne-Laure Lemaitre, Guillaume Herbet, Hugues Duffau, Gilles Lafargue
Brodmann area 10 (BA10) is thought to be at the summit of the prefrontal cortex's hierarchical organization. It is widely accepted that metacognitive abilities depend on the structural and functional properties of BA10. Our objective was to assess whether metacognition can be maintained after low-grade glioma surgery with BA10 resection. Three groups of participants were recruited: (i) patients having undergone resection of the right prefrontal cortex, including BA10 (n = 9); (ii) patients having undergone resection of the right prefrontal cortex but not BA10 (n = 10); and (iii) healthy controls (n = 38)...
November 6, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/29111591/magnetoencephalographic-imaging-of-ictal-high-frequency-oscillations-80-200%C3%A2-hz-in-pharmacologically-resistant-focal-epilepsy
#6
Jayabal Velmurugan, Srikantan S Nagarajan, Narayanan Mariyappa, Shankar G Ravi, Kandavel Thennarasu, Ravindranadh C Mundlamuri, Kenchaiah Raghavendra, Rose Dawn Bharath, Jitender Saini, Arimappamagan Arivazhagan, Jamuna Rajan, Anita Mahadevan, Malla B Rao, Parthasarathy Satishchandra, Sanjib Sinha
OBJECTIVE: Specificity of ictal high-frequency oscillations (HFOs) in identifying epileptogenic abnormality is significant, compared to the spikes and interictal HFOs. The objectives of the study were to detect and to localize ictal HFOs by magnetoencephalography (MEG) for identifying the seizure onset zone (SOZ), evaluate the cortical excitability from preictal to ictal transition, and establish HFO concordance rates with other modalities and postsurgical resection. METHODS: Sixty-seven patients with drug-resistant epilepsy had at least 1 spontaneous seizure each during MEG acquisition, and analysis was carried out on 20 seizures from 20 patients...
November 7, 2017: Epilepsia
https://www.readbyqxmd.com/read/29106684/frontal-lobe-epilepsy-surgery-in-childhood-and-adolescence-predictors-of-long-term-seizure-freedom-overall-cognitive-and-adaptive-functioning
#7
Georgia Ramantani, Navah Ester Kadish, Hans Mayer, Constantin Anastasopoulos, Kathrin Wagner, Gitta Reuner, Karl Strobl, Susanne Schubert-Bast, Gert Wiegand, Armin Brandt, Rudolf Korinthenberg, Irina Mader, Vera van Velthoven, Josef Zentner, Andreas Schulze-Bonhage, Thomas Bast
BACKGROUND: Although frontal lobe resections account for one-third of intralobar resections in pediatric epilepsy surgery, there is a dearth of information regarding long-term seizure freedom, overall cognitive and adaptive functioning. OBJECTIVE: To identify outcome predictors and define the appropriate timing for surgery. METHODS: We retrospectively analyzed the data of 75 consecutive patients aged 10.0 ± 4.9 yr at surgery that had an 8...
July 5, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29101860/correlation-between-extreme-fear-and-focal-cortical-dysplasia-in-anterior-cingulate-gyrus-evidence-from-a-surgical-case-of-refractory-epilepsy
#8
Liang Qiao, Tao Yu, Duanyu Ni, Xueyuan Wang, Cuiping Xu, Chang Liu, Guojun Zhang, Yongjie Li
Localizing the semiology of ictal fear and seizure onset in epilepsy patients is commonly challenging due to limited value of routine electroencephalography (EEG) and very few surgical attempts. Here we reported a case of refractory epilepsy characterized by aura of extreme fear and hypermotor seizures, in which the left (dominant hemisphere) anterior cingulate gyrus (ACG) was determined to be the epileptogenic zone (EZ) through multiple modalities of presurgical evaluation including analysis of high frequency oscillation on intracranial EEG...
October 31, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29100949/plasticity-of-the-human-visual-brain-after-early-cortical-lesion
#9
K Mikellidou, R Arrighi, G Aghakhanyan, F Tinelli, F Frijia, S Crespi, F De Masi, D Montanaro, M C Morrone
In adults, partial damage to V1 or optic radiations abolishes perception in the corresponding part of the visual field, causing a scotoma. However, it is widely accepted that the developing cortex has superior capacities to reorganize following an early lesion to endorse adaptive plasticity. Here we report a single patient case (G.S.) with near normal central field vision despite a massive unilateral lesion to the optic radiations acquired early in life. The patient underwent surgical removal of a right hemisphere parieto-temporal-occipital atypical choroid plexus papilloma of the right lateral ventricle at four months of age, which presumably altered the visual pathways during in utero development...
October 31, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29097316/quantitative-surface-analysis-of-combined-mri-and-pet-enhances-detection-of-focal-cortical-dysplasias
#10
Yee-Leng Tan, Hosung Kim, Seunghyun Lee, Tarik Tihan, Lawrence Ver Hoef, Susanne G Mueller, Anthony James Barkovich, Duan Xu, Robert Knowlton
OBJECTIVE: Focal cortical dysplasias (FCDs) often cause pharmacoresistant epilepsy, and surgical resection can lead to seizure-freedom. Magnetic resonance imaging (MRI) and positron emission tomography (PET) play complementary roles in FCD identification/localization; nevertheless, many FCDs are small or subtle, and difficult to find on routine radiological inspection. We aimed to automatically detect subtle or visually-unidentifiable FCDs by building a classifier based on an optimized cortical surface sampling of combined MRI and PET features...
October 31, 2017: NeuroImage
https://www.readbyqxmd.com/read/29097251/fear-conditioned-alterations-of-motor-cortex-excitability-the-role-of-amygdala
#11
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/29089866/rapid-identification-of-cortical-motor-areas-in-rodents-by-high-frequency-automatic-cortical-stimulation-and-novel-motor-threshold-algorithm
#12
Mitsuaki Takemi, Elisa Castagnola, Alberto Ansaldo, Davide Ricci, Luciano Fadiga, Miki Taoka, Atsushi Iriki, Junichi Ushiba
Cortical stimulation mapping is a valuable tool to test the functional organization of the motor cortex in both basic neurophysiology (e.g., elucidating the process of motor plasticity) and clinical practice (e.g., before resecting brain tumors involving the motor cortex). However, compilation of motor maps based on the motor threshold (MT) requires a large number of cortical stimulations and is therefore time consuming. Shortening the time for mapping may reduce stress on the subjects and unveil short-term plasticity mechanisms...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29089767/thalamo-cortical-network-underlying-deep-brain-stimulation-of-centromedian-thalamic-nuclei-in-intractable-epilepsy-a-multimodal-imaging-analysis
#13
Seong Hoon Kim, Sung Chul Lim, Dong Won Yang, Jeong Hee Cho, Byung-Chul Son, Jiyeon Kim, Seung Bong Hong, Young-Min Shon
OBJECTIVE: Deep brain stimulation (DBS) of the centromedian thalamic nucleus (CM) can be an alternative treatment option for intractable epilepsy patients. Since CM may be involved in widespread cortico-subcortical networks, identification of the cortical sub-networks specific to the target stimuli may provide further understanding on the underlying mechanisms of CM DBS. Several brain structures have distinguishing brain connections that may be related to the pivotal propagation and subsequent clinical effect of DBS...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29076788/relationship-between-cortical-resection-and-visual-function-after-occipital-lobe-epilepsy-surgery
#14
Won Heo, June Sic Kim, Chun Kee Chung, Sang Kun Lee
OBJECTIVE In this study, the authors investigated long-term clinical and visual outcomes of patients after occipital lobe epilepsy (OLE) surgery and analyzed the relationship between visual cortical resection and visual function after OLE surgery. METHODS A total of 42 consecutive patients who were diagnosed with OLE and underwent occipital lobe resection between June 1995 and November 2013 were included. Clinical, radiological, and histopathological data were reviewed retrospectively. Seizure outcomes were categorized according to the Engel classification...
October 27, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29074057/magnetoencephalographic-characteristics-of-cortical-dysplasia-in-children
#15
Nitin Agarwal, Balu Krishnan, Richard C Burgess, Richard A Prayson, Andreas V Alexopoulos, Ajay Gupta
BACKGROUND AND RATIONALE: Magnetoencephalography has emerged as a tool for preoperative evaluation in children. We aimed to study magnetoencephalography characteristics in subtypes of focal cortical dysplasia and correlate with postoperative seizure outcome. METHODS: Inclusion criteria were children ≤18 years who had magnetoencephalography during preoperative workup followed by epilepsy surgery and a histopathologic diagnosis of focal cortical dysplasia between February 2008 and February 2013...
September 19, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/29073500/precision-surgery-of-rolandic-glioma-and-insights-from-extended-functional-mapping
#16
Oliver Flouty, Chandan Reddy, Marshall Holland, Christopher Kovach, Hiroto Kawasaki, Hiroyuki Oya, Jeremy Greenlee, Patrick Hitchon, Matthew Howard
OBJECTIVES: Electrical cortical stimulation mapping (ECSM) is the current gold standard functional mapping technique; however, it is burdened by several limitations. Our objective in this study is to show that extended functional mapping modalities can (1) allow neurosurgeons to map and preserve eloquent regions that are inaccessible by the traditional ECSM technique and (2) factor into the operative decision-making process and surgical trajectory during resection of Rolandic brain tumors...
October 10, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29069555/histopathological-findings-in-brain-tissue-obtained-during-epilepsy-surgery
#17
Ingmar Blumcke, Roberto Spreafico, Gerrit Haaker, Roland Coras, Katja Kobow, Christian G Bien, Margarete Pfäfflin, Christian Elger, Guido Widman, Johannes Schramm, Albert Becker, Kees P Braun, Frans Leijten, Johannes C Baayen, Eleonora Aronica, Francine Chassoux, Hajo Hamer, Hermann Stefan, Karl Rössler, Maria Thom, Matthew C Walker, Sanjay M Sisodiya, John S Duncan, Andrew W McEvoy, Tom Pieper, Hans Holthausen, Manfred Kudernatsch, H Joachim Meencke, Philippe Kahane, Andreas Schulze-Bonhage, Josef Zentner, Dieter H Heiland, Horst Urbach, Bernhard J Steinhoff, Thomas Bast, Laura Tassi, Giorgio Lo Russo, Cigdem Özkara, Buge Oz, Pavel Krsek, Silke Vogelgesang, Uwe Runge, Holger Lerche, Yvonne Weber, Mrinalini Honavar, José Pimentel, Alexis Arzimanoglou, Adriana Ulate-Campos, Soheyl Noachtar, Elisabeth Hartl, Olaf Schijns, Renzo Guerrini, Carmen Barba, Thomas S Jacques, J Helen Cross, Martha Feucht, Angelika Mühlebner, Thomas Grunwald, Eugen Trinka, Peter A Winkler, Antonio Gil-Nagel, Rafael Toledano Delgado, Thomas Mayer, Martin Lutz, Basilios Zountsas, Kyriakos Garganis, Felix Rosenow, Anke Hermsen, Tim J von Oertzen, Thomas L Diepgen, Giuliano Avanzini
BACKGROUND: Detailed neuropathological information on the structural brain lesions underlying seizures is valuable for understanding drug-resistant focal epilepsy. METHODS: We report the diagnoses made on the basis of resected brain specimens from 9523 patients who underwent epilepsy surgery for drug-resistant seizures in 36 centers from 12 European countries over 25 years. Histopathological diagnoses were determined through examination of the specimens in local hospitals (41%) or at the German Neuropathology Reference Center for Epilepsy Surgery (59%)...
October 26, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29060892/sensorimotor-network-parcellation-for-pre-surgical-patients-using-low-pass-filtered-fmri
#18
Hao Han, Yuxiang Yan, Wenjing Zhou, Bo Hong
Pre-surgical mapping of sensorimotor and language functions is crucial to reduce neurological deficits in epilepsy and tumor resection surgery. As non-invasive mapping, both resting-state and task-evoked functional MRI has been explored in pre-surgical mapping. In lack of standardized test paradigm, the reliability of fMRI mapping is still a concern for clinical use. In this study, to improve the reliability of fMRI based mapping, task fMRI data from all available task paradigms (motor movement, word repeating and picture naming) were low-pass filtered in the band of resting-state fMRI (0...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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/29054779/prevalence-characteristics-and-long-term-prognosis-of-epilepsy-associated-with-pediatric-brain-tumors
#20
Hadar Weisman, Iris Fried, Tal Gilboa, Odeya Bennett-Back, Dana Ekstein, Moatasem Shweiki, Yigal Shoshan, Mony Benifla
OBJECTIVE: We investigated the prevalence, onset, characteristics and long-term course of epilepsy disease in children who underwent surgical intervention for diagnosed brain tumors. METHODS: We reviewed the medical records of children with diagnosed brain tumors, who underwent surgery during 2004-2014 at the Hadassah Medical Center. All patients with epilepsy were invited to a clinical visit that included a neurological exam. The primary outcome measures were neurological status according to the Glasgow Outcome Scale (GOS) and postoperative seizure outcome according to the Engel system...
October 17, 2017: World Neurosurgery
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