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Insular anatomy

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https://www.readbyqxmd.com/read/28701931/architecture-of-the-entorhinal-cortex-a-review-of-entorhinal-anatomy-in-rodents-with-some-comparative-notes
#1
REVIEW
Menno P Witter, Thanh P Doan, Bente Jacobsen, Eirik S Nilssen, Shinya Ohara
The entorhinal cortex (EC) is the major input and output structure of the hippocampal formation, forming the nodal point in cortico-hippocampal circuits. Different division schemes including two or many more subdivisions have been proposed, but here we will argue that subdividing EC into two components, the lateral EC (LEC) and medial EC (MEC) might suffice to describe the functional architecture of EC. This subdivision then leads to an anatomical interpretation of the different phenotypes of LEC and MEC. First, we will briefly summarize the cytoarchitectonic differences and differences in hippocampal projection patterns on which the subdivision between LEC and MEC traditionally is based and provide a short comparative perspective...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28548479/insular-gliomas-a-surgical-reappraisal-based-on-a-systematic-review-of-the-literature
#2
Domenico Murrone, Rodolfo Maduri, Afif Afif, Domenico Chirchiglia, Isabelle Pelissou-Guyotat, Jacques Guyotat, Francesco Signorelli
INTRODUCTION: Insular gliomas are heterogeneous lesions whose management presents multiple challenges for their tendency to affect young patients in good neurological and cognitive conditions, their deep anatomic location and proximity with critical functional and vascular structures. The appropriate management of insular gliomas requires a multidisciplinary evidence-centred teamwork grounded on the best anatomic, neurophysiological and oncological knowledge. The present study provides a reappraisal of the management of insular gliomas based on a systematic review of the literature with the aim of guiding clinicians in the management of such tumors...
May 25, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28506483/cortical-and-subcortical-functional-neuroanatomy-for-low-grade-glioma-surgery
#3
REVIEW
L Chenin, M Lefranc, S Velut, P Foulon, E Havet, J Peltier
Knowledge of the encephalon anatomy is crucial for neurosurgical practice, especially the main cortical functional structures and their connections. General organisation of the encephalon is presented with frontal, parietal, occipital, temporal, limbic and insular lobes and their Brodmann correspondence. Secondly, subcortical anatomy will be presented with main white matter fasciculi in three separated categories: association, commissural and projection fibers. Main association fibers are inferior occipitofrontal fasciculus, superior longitudinal fasciculus, arcuate fasciculus, inferior longitudinal fasciculus, uncinate fasciculus, and cingulum...
May 12, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28434111/idh-mutation-and-1p19q-codeletion-distinguish-two-radiological-patterns-of-diffuse-low-grade-gliomas
#4
Amélie Darlix, Jérémy Deverdun, Nicolas Menjot de Champfleur, Florence Castan, Sonia Zouaoui, Valérie Rigau, Michel Fabbro, Yordanka Yordanova, Emmanuelle Le Bars, Luc Bauchet, Catherine Gozé, Hugues Duffau
Diffuse low-grade gliomas (DLGG) prognosis is variable, depending on several factors, including the isocitrate dehydrogenase (IDH) mutation and the 1p19q codeletion. A few studies suggested associations between these parameters and tumor radiological characteristics including topography. Our aim was analyzing the correlations between the IDH and 1p19q statuses and the tumor intracerebral distribution (at the lobar and voxel levels), volume, and borders. We conducted a retrospective, monocentric study on a consecutive series of 198 DLGG patients...
April 22, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28408263/volumetric-analysis-of-extent-of-resection-survival-and-surgical-outcomes-for-insular-gliomas
#5
Chikezie I Eseonu, Karim ReFaey, Oscar Garcia, Gugan Raghuraman, Alfredo Quinones-Hinojosa
BACKGROUND: Insular gliomas are challenging tumors to surgically resect owing to the anatomy surrounding them. This study evaluates the role of extent of resection (EOR) and molecular markers in surgical outcome and survival for insular gliomas. METHODS: Seventy-four patients who had undergone initial resection for insular glioma by the same surgeon between 2006 and 2016 were analyzed. Low-grade gliomas (LGGs) (grade II) and high-grade gliomas (HGGs) (grade III/IV) were analyzed for the prognostic role of volumetric EOR and molecular markers in patient survival outcomes...
July 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28365848/attenuation-of-cortical-activity-triggering-descending-pain-inhibition-in-chronic-low-back-pain-patients-a-functional-magnetic-resonance-imaging-study
#6
Yohei Matsuo, Jiro Kurata, Miho Sekiguchi, Katsuhiro Yoshida, Takuya Nikaido, Shin-Ichi Konno
PURPOSE: A considerable portion of chronic low back pain (cLBP) patients lack anatomical abnormality, resist conventional therapeutic interventions, and their symptoms are often complicated with psychological and social factors. Such patients have been reported to show cerebral abnormalities both in anatomy and function by neuroimaging studies. Here we examined differences in cerebral reactivity to a simulated low back pain stimulus between cLBP patients and healthy controls by functional magnetic resonance imaging (fMRI), and their behavioral correlates from a psychophysical questionnaire...
August 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28291211/-surgical-anatomy-of-the-peri-insular-association-tracts-part-i-the-superior-longitudinal-fascicle-system
#7
A E Bykanov, D I Pitskhelauri, A I Batalov, I N Pronin, M A Shkarubo, G F Dobrovol'sky, G L Kobyakov, S B Buklina, V L Puchkov, N E Zakharova, A S Smirnov, A Z Sanikidze, D A Gol'bin, E L Pogosbekyan, E S Kudieva, A M Shkatova, A A Potapov
AIM: To study the peri-insular association tract anatomy and define the permissible anatomical boundaries for resection of glial insular tumors with allowance for the surgical anatomy of the peri-insular association tracts. MATERIAL AND METHODS: In an anatomic study of the superior longitudinal fascicle system (SLF I, SLF II, SLF III, arcuate fascicle), we used 12 anatomical specimens (6 left and 6 right hemispheres) prepared according to the Klingler's fiber dissection technique...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28268147/insular-infarction-in-subdural-hematoma-a-case-series-and-pathophysiologic-review
#8
REVIEW
Daniel C Sacchetti, Sandra C Yan, Bradford B Thompson, Corey R Fehnel
Subdural hematoma (SDH) is among the most common conditions managed by neurologists and neurosurgeons. As SDH incidence rates increase, a wider spectrum of SDH related complications have become evident. We prospectively identified a series of three patients with similar patterns of ipsilateral insular diffusion weighted imaging (DWI) hyperintensity associated with subdural hematoma. Detailed chart review was performed, and cases are described in relation to anatomy and proposed pathophysiology of venous hypertension and arterial vasospasm...
May 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28081452/differential-white-matter-involvement-associated-with-distinct-visuospatial-deficits-after-right-hemisphere-stroke
#9
Alex R Carter, Mark P McAvoy, Joshua S Siegel, Xin Hong, Serguei V Astafiev, Jennifer Rengachary, Kristi Zinn, Nicholas V Metcalf, Gordon L Shulman, Maurizio Corbetta
Visuospatial attention depends on the integration of multiple processes, and people with right hemisphere lesions after a stroke may exhibit severe or no visuospatial deficits. The anatomy of core components of visuospatial attention is an area of intense interest. Here we examine the relationship between the disruption of core components of attention and lesion distribution in a heterogeneous group (N = 70) of patients with right hemisphere strokes regardless of the presence of clinical neglect. Deficits of lateralized spatial orienting, measured as the difference in reaction times for responding to visual targets in the contralesional or ipsilesional visual field, and deficits in re-orienting attention, as measured by the difference in reaction times for invalidly versus validly cued targets, were measured using a computerized spatial orienting task...
March 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28059650/surgical-benefits-of-combined-awake-craniotomy-and-intraoperative-magnetic-resonance-imaging-for-gliomas-associated-with-eloquent-areas
#10
Kazuya Motomura, Atsushi Natsume, Kentaro Iijima, Shunichiro Kuramitsu, Masazumi Fujii, Takashi Yamamoto, Satoshi Maesawa, Junko Sugiura, Toshihiko Wakabayashi
OBJECTIVE Maximum extent of resection (EOR) for lower-grade and high-grade gliomas can increase survival rates of patients. However, these infiltrative gliomas are often observed near or within eloquent regions of the brain. Awake surgery is of known benefit for the treatment of gliomas associated with eloquent regions in that brain function can be preserved. On the other hand, intraoperative MRI (iMRI) has been successfully used to maximize the resection of tumors, which can detect small amounts of residual tumors...
January 6, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27813463/bypass-surgery-for-complex-middle-cerebral-artery-aneurysms-an-algorithmic-approach-to-revascularization
#11
Ali Tayebi Meybodi, Wendy Huang, Arnau Benet, Olivia Kola, Michael T Lawton
OBJECT Management of complex aneurysms of the middle cerebral artery (MCA) can be challenging. Lesions not amenable to endovascular techniques or direct clipping might require a bypass procedure with aneurysm obliteration. Various bypass techniques are available, but an algorithmic approach to classifying these lesions and determining the optimal bypass strategy has not been developed. The objective of this study was to propose a comprehensive and flexible algorithm based on MCA aneurysm location for selecting the best of multiple bypass options...
November 4, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27778106/the-telencephalon-of-the-g%C3%A3-ttingen-minipig-cytoarchitecture-and-cortical-surface-anatomy
#12
Carsten R Bjarkam, Andreas N Glud, Dariusz Orlowski, Jens Christian H Sørensen, Nicola Palomero-Gallagher
During the last 20 years pigs have become increasingly popular in large animal translational neuroscience research as an economical and ethical feasible substitute to non-human primates. The anatomy of the pig telencephalon is, however, not well known. We present, accordingly, a detailed description of the surface anatomy and cytoarchitecture of the Göttingen minipig telencephalon based on macrophotos and consecutive high-power microphotographs of 15 μm thick paraffin embedded Nissl-stained coronal sections...
October 24, 2016: Brain Structure & Function
https://www.readbyqxmd.com/read/27765721/neuronavigated-fiber-dissection-with-pial-preservation-laboratory-model-to-simulate-opercular-approaches-to-insular-tumors
#13
Emmanuel Mandonnet, Juan Martino, Silvio Sarubbo, Francesco Corrivetti, Schahrazed Bouazza, Damien Bresson, Hugues Duffau, Sebastien Froelich
BACKGROUND: Advances in the oncologic and functional results of insular surgery have been reported recently. Such successes have been made possible by the advent of the transopercular approach under awake monitoring and by improved anatomic and functional knowledge of white matter pathways surrounding the insula. Nonetheless, given the rarity of insular tumors, it is difficult to get familiar with the complex 3-dimensional anatomy of the different neuronal and vascular structures encountered during a transopercular insular resection...
February 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27593723/successful-insular-glioma-removal-in-a-deaf-signer-patient-during-an-awake-craniotomy-procedure
#14
Philippe Metellus, Salah Boussen, Maxime Guye, Agnes Trebuchon
BACKGROUND: Resection of tumors located within the insula of the dominant hemisphere represents a technical challenge because of the complex anatomy, including the surrounding vasculature, and the relationship to functional (motor and language) structures. We report here the case of a successful resection of a left insular glioma in a native deaf signer during an awake craniotomy. CASE DESCRIPTION: The patient, a congenitally deaf right-handed patient who is a native user of sign language, presented with a seizure 1 week before he was referred to our department...
February 2017: World Neurosurgery
https://www.readbyqxmd.com/read/27294356/the-transsylvian-approach-for-resection-of-insular-gliomas-technical-nuances-of-splitting-the-sylvian-fissure
#15
REVIEW
Michael M Safaee, Dario J Englot, Seunggu J Han, Michael T Lawton, Mitchel S Berger
Insular gliomas represent a unique surgical challenge due to the complex anatomy and nearby vascular elements associated within the Sylvian fissure. For certain tumors, the transsylvian approach provides an effective technique for achieving maximal safe resection. The goal of this manuscript and video are to present and discuss the surgical nuances and appropriate application of splitting the Sylvian fissure. Our hope is that this video highlights the safety and efficacy of the transsylvian approach for appropriately selected insular gliomas...
November 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/27176898/faces-in-the-mirror-from-the-neuroscience-of-mimicry-to-the-emergence-of-mentalizing
#16
Antonella Tramacere, Pier Francesco Ferrari
In the current opinion paper, we provide a comparative perspective on specific aspects of primate empathic abilities, with particular emphasis on the mirror neuron system associated with mouth/face actions and expression. Mouth and faces can be very salient communicative classes of stimuli that allow an observer access to the emotional and physiological content of other individuals. We thus describe patterns of activations of neural populations related to observation and execution of specific mouth actions and emotional facial expressions in some species of monkeys and in humans...
June 20, 2016: Journal of Anthropological Sciences, Rivista di Antropologia: JASS
https://www.readbyqxmd.com/read/27161250/surgery-of-insular-and-paralimbic-diffuse-low-grade-gliomas-technical-considerations
#17
Karine Michaud, Hugues Duffau
Once considered a "no man's land" especially when invaded by a diffuse low grade glioma (DLGG), the insula remains to this day a surgical challenge. Surgery for insular DLGG involves consideration of its hidden location under the potentially eloquent operculae, the proximity to vascular tree and high density of functions not only in the insular cortex but also in the white fiber pathways passing under the insular lobe. The natural history of DLGG and the potential benefits and consequences of the surgical approach also need a close look...
May 9, 2016: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/26635559/roles-of-the-different-sub-regions-of-the-insular-cortex-in-various-phases-of-the-decision-making-process
#18
REVIEW
Vita Droutman, Antoine Bechara, Stephen J Read
This paper presents a coherent account of the role of the insular cortex (IC) in decision-making. We follow a conceptualization of decision-making that is very close to one previously proposed by Ernst and Paulus (2005): that the decision process is a progression of four phases: (1) re-focusing attention; (2) evaluation; (3) action; and (4) outcome processing, and we present evidence for the insula's role in all these phases. We review the existing work on insula's functional anatomy that subdivides the IC into posterior, dorsal anterior and ventral anterior regions...
2015: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/26529622/-surgical-anatomy-of-the-insular-cortex
#19
A E Bykanov, D I Pitskhelauri, G F Dobrovol'skiy, M A Shkarubo
OBJECTIVE: The objective of the study was to investigate the surgical anatomy of the insular cortex, morphology and vascularization of the insula and adjacent opercula in terms of transsylvian and transcortical approaches, and identification of the permissible anatomical boundaries for resection of glial tumors of the insula. MATERIAL AND METHODS: The study was conducted on 18 anatomical specimens fixed in an alcohol-glycerol solution. Perfusion of the internal carotid artery with red latex was used to study the arterial system...
2015: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/26514961/temporal-lobe-anatomy-eight-imaging-signs-to-facilitate-interpretation-of-mri
#20
Vance T Lehman, David F Black, Matt A Bernstein, Kirk M Welker
PURPOSE: The temporal lobe is anatomically and functionally complex. However, relatively few radiologic signs are described to facilitate recognition of temporal lobe sulci and gyri in clinical practice. We devised and tested 8 radiologic signs of temporal lobe anatomy. METHODS: Images from volumetric magnetization-prepared rapid gradient-echo imaging were analyzed of 100 temporal lobes from 26 female and 24 male patients. Patient age ranged from 1 to 79 years (mean 19 years; standard deviation 16 years)...
May 2016: Surgical and Radiologic Anatomy: SRA
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