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Insular anatomy

Emmanuel Mandonnet, Juan Martino, Silvio Sarubbo, Francesco Corrivetti, Schahraed Bouazza, Damien Bresson, Hugues Duffau, Sebastien Froelich
BACKGROUND: Advances in the oncological 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 the improved anatomical and functional knowledge of the white matter pathways surrounding the insula. Nonetheless, given the rarity of insular tumors, it is difficult to get familiar with the complex 3D anatomy of the different neuronal and vascular structures encountered during a transopercular insular resection...
October 17, 2016: World Neurosurgery
Philippe Metellus, Salah Boussen, Maxime Guye, Agnes Trebuchon
BACKGROUND: Resection of tumors located within the insula of the dominant hemisphere represents a technical challenge due to complex anatomy including 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: Subject A.G., a congenitally deaf right-handed patient who is a native user of Sign Language, presented a seizure one week before he was referred to our department...
September 1, 2016: World Neurosurgery
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...
June 13, 2016: Journal of Neuro-oncology
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
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
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
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
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
Matthieu Delion, Philippe Mercier, Gilles Brassier
We present a vascular anatomical study of the arteries and veins of the sylvian fissure and insula.A good knowledge of the sylvian fissure, the insula, and their vascular relationship would seem mandatory before performing surgery in this area, whatever the type of surgery (aneurysms, arteriovenous malformations, insular tumors).We start with the sylvian fissure and insula morphology, followed by the MCA description and its perforators, with special attention paid to the insular perforators. We demonstrate that the long insular perforators penetrating in the superior part of the posterior short gyrus and long gyri vascularize, respectively, the corticonuclear and corticospinal fasciculi...
2016: Advances and Technical Standards in Neurosurgery
Arnau Benet, Shawn L Hervey-Jumper, Jose Juan González Sánchez, Michael T Lawton, Mitchel S Berger
OBJECTIVE: Transcortical and transsylvian corridors have been previously described as the main surgical approaches to the insula, but there is insufficient evidence to support one approach versus the other. The authors performed a cadaveric comparative study regarding insular exposure, surgical window and freedom, between the transcortical and transsylvian approaches (with and without cutting superficial sylvian bridging veins). Surgical anatomy and skull surface reference points to the different insular regions are also described...
February 2016: Journal of Neurosurgery
Bahram Mohammadi, Anke Hammer, Stephan F Miedl, Daniel Wiswede, Josep Marco-Pallarés, Manfred Herrmann, Thomas F Münte
The steepness of the delay discounting function shows considerable interindividual differences. Moreover, faster devaluation of future rewards has been consistently observed in pathological gamblers (PGs). Here, we asked whether variability in delay discounting is at least partially driven by differences in the anatomy of gray and white matter. For 40 healthy young subjects (study 1) as well as 15 PG and 15 age-matched healthy controls (HCs, study 2), the individual discounting parameter k was obtained. Based on 3D T1-weighted high-resolution magnetic resonance scans and diffusion tensor imaging, we performed voxel-based morphometry and tract-based spatial statistics, respectively, to examine the relation of gray matter volume (GMV) and white matter properties (as indicated by fractional anisotropy, FA) to k...
July 2016: Brain Structure & Function
Marcia N Goddard, Hanna Swaab, Serge A R B Rombouts, Sophie van Rijn
Klinefelter syndrome (47, XXY) is associated with several physical, cognitive, and behavioral consequences. In terms of social development, there is an increased risk of autism symptomatology. However, it remains unclear how social deficits are related to abnormal brain development and to what degree underlying mechanisms of social dysfunction in 47, XXY are similar to, or different from, those in idiopathic autism (ASD). This study was aimed at investigating the neural architecture of brain structures related to social information processing in boys with 47, XXY, also in comparison with boys with idiopathic ASD...
September 2016: European Archives of Psychiatry and Clinical Neuroscience
Allison Rosen, David Qixiang Chen, Dave J Hayes, Karen D Davis, Mojgan Hodaie
BACKGROUND: Interest in the anatomy of the insula is driven by its multifunctionality and the need for accurate visualization for surgical purposes. Few in vivo studies of human insular anatomy have been conducted due to methodological and anatomical challenges. OBJECTIVE: We used brain cortical morphometry tools to accurately reconstruct insular topology and permit a detailed visualization of its gyri in 3 dimensions. METHODS: Sixty healthy subjects (33 females; 37...
2015: Stereotactic and Functional Neurosurgery
Juan Martino, David Mato, Enrique Marco de Lucas, Juan A García-Porrero, Andreu Gabarrós, Alejandro Fernández-Coello, Alfonso Vázquez-Barquero
OBJECT: Little attention has been given to the functional challenges of the insular approach to the resection of gliomas, despite the potential damage of essential neural networks that underlie the insula. The object of this study is to analyze the subcortical anatomy of the insular region when infiltrated by gliomas, and compare it with the normal anatomy in nontumoral hemispheres. METHODS: Ten postmortem human hemispheres were dissected, with isolation of the inferior fronto-occipital fasciculus (IFOF) and the uncinate fasciculus...
October 2015: Journal of Neurosurgery
Eduardo Carvalhal Ribas, Kaan Yagmurlu, Hung Tzu Wen, Albert L Rhoton
OBJECT: The purpose of this study was to describe the location of each white matter pathway in the area between the inferior limiting insular sulcus (ILS) and temporal horn that may be crossed in approaches through the temporal stem to the medial temporal lobe. METHODS: The fiber tracts in 14 adult cadaveric cerebral hemispheres were examined using the Klingler technique. The fiber dissections were completed in a stepwise manner, identifying each white matter pathway in different planes and describing its position in relation to the anterior end of the ILS...
June 2015: Journal of Neurosurgery
Chiara Nosarti, Kie Woo Nam, Muriel Walshe, Robin M Murray, Marion Cuddy, Larry Rifkin, Matthew P G Allin
Alterations in cortical development and impaired neurodevelopmental outcomes have been described following very preterm (VPT) birth in childhood and adolescence, but only a few studies to date have investigated grey matter (GM) and white matter (WM) maturation in VPT samples in early adult life. Using voxel-based morphometry (VBM) we studied regional GM and WM volumes in 68 VPT-born individuals (mean gestational age 30 weeks) and 43 term-born controls aged 19-20 years, and their association with cognitive outcomes (Hayling Sentence Completion Test, Controlled Oral Word Association Test, Visual Reproduction test of the Wechsler Memory Scale-Revised) and gestational age...
2014: NeuroImage: Clinical
Carlos Bucheli, David Mato, Enrique Marco de Lucas, Juan A García-Porrero, Alfonso Vázquez-Barquero, Juan Martino
INTRODUCTION: The insula is a highly connected area, as an intricate network of afferent and efferent projections connect it with adjacent and distant cortical regions. OBJECTIVE: To perform an extensive review of recent literature to analyse the anatomy of the associative tracts related to the insula. RESULTS: The frontal aslant tract, arcuate fasciculus, horizontal portion of the superior longitudinal fasciculus and the middle longitudinal fasciculus are associative tracts connected to the opercula...
November 2014: Neurocirugía
Laure Mazzola, Christophe Lopez, Isabelle Faillenot, Florian Chouchou, François Mauguière, Jean Isnard
OBJECTIVE: The present study provides a functional mapping of vestibular responses in the human insular cortex. METHODS: A total of 642 electrical stimulations of the insula were performed in 219 patients, using stereotactically implanted depth electrodes, during the presurgical evaluation of drug-refractory partial epilepsy. We retrospectively identified 41 contacts where stimulation elicited vestibular sensations (VSs) and analyzed their location with respect to (1) their stereotactic coordinates (for all contacts), (2) the anatomy of insula gyri (for 20 vestibular sites), and (3) the probabilistic cytoarchitectonic maps of the insula (for 9 vestibular sites)...
October 2014: Annals of Neurology
Matthieu Delion, Philippe Mercier
BACKGROUND: The insular perforating arteries originate from the middle cerebral artery. They have only been very partially described up to now. In the literature, they come from the M2 segment and three types are listed: the short, medium and long perforators. The first two types supply the claustrum as well as the external and extreme capsules. OBJECTIVE: We describe the anatomy of long perforating insular arteries and their arterial contribution to the main white matter bundles of the oval center of Vieussens...
October 2014: Acta Neurochirurgica
Chia-Shu Lin
Brain neuroimaging has been widely used to investigate the bran signature of chronic orofacial pain, including trigeminal neuropathic pain (TNP) and pain related to temporomandibular joint disorders (TMD). We here systematically reviewed the neuroimaging literature regarding the functional and structural changes in the brain of TNP and TMD pain patients, using a computerized search of journal articles via PubMed. Ten TNP studies and 14 TMD studies were reviewed. Study quality and risk of bias were assessed based on the criteria of patient selection, the history of medication, the use of standardized pain/psychological assessments, and the model and statistics of imaging analyses...
2014: PloS One
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