DOCSLIB.ORG

(OCD) Using Treatment-Induced Neuroimaging Changes

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
(OCD) Using Treatment-Induced Neuroimaging Changes Neurosurgery J Neurol Neurosurg Psychiatry: first published as 10.1136/jnnp-2020-324478 on 27 April 2021. Downloaded from Review Defining functional brain networks underlying obsessive–compulsive disorder (OCD) using treatment- induced neuroimaging changes: a systematic review of the literature Kelly R. Bijanki ,1 Yagna J. Pathak,2 Ricardo A. Najera,1 Eric A. Storch,3 Wayne K Goodman,3 H. Blair Simpson,4 Sameer A. Sheth1 ► Additional material is ABSTRACT Aberrant signalling in cortico- striato- thalamo- published online only. To view Approximately 2%–3% of the population suffers from cortical (CSTC) circuits is considered to be an please visit the journal online obsessive–compulsive disorder (OCD). Several brain important pathological mechanism underlying (http:// dx. doi. org/ 10. 1136/ [S1- S3] jnnp- 2020- 324478). regions have been implicated in the pathophysiology OCD. These circuits are composed of glutama- of OCD, but their various contributions remain unclear. tergic and GABAergic projections that connect fron- 1 Department of Neurosurgery, We examined changes in structural and functional tocortical and subcortical brain areas.[S4- S9] Within Baylor College of Medicine, the CSTC loop, the direct pathway from striatum Houston, Texas, USA neuroimaging before and after a variety of therapeutic 2Department of Neurological interventions as an index into identifying the underlying to internal pallidum to thalamus and back to cortex Surgery, Columbia University networks involved. We identified 64 studies from 1990 exerts a net excitatory effect, and the indirect Medical Center, New York, New to 2020 comparing pretreatment and post-treatment pathway, which additionally includes the external York, USA 3 imaging of patients with OCD, including metabolic pallidum and subthalamic nucleus, produces a Menninger Department of net inhibitory effect.[S4] A lack of balance in these Psychiatry and Behavioral and perfusion, neurochemical, structural, functional Sciences, Baylor College of and connectivity-based modalities. Treatment class pathways is hypothesised to lead to a dysregulated Medicine, Houston, TX, USA included pharmacotherapy, cognitive–behavioural thalamo- cortical drive resulting in inappropriate 4Department of Psychiatry, therapy/exposure and response prevention, stereotactic selection of actions and failure to inhibit maladap- Columbia University Medical tive behaviours, both of which are characteristic Center, New York, New York, lesions, deep brain stimulation and transcranial [S4,S10-11] USA magnetic stimulation. Changes in several brain of the OCD phenotype. CSTC regions regions are consistent and correspond with treatment most frequently investigated in OCD are regions Correspondence to response despite the heterogeneity in treatments and of prefrontal cortex (PFC) (including orbitofrontal Dr Sameer A. Sheth, Department neuroimaging modalities. Most notable are decreases cortex (OFC), dorsolateral PFC (DLPFC), ventro- of Neurosurgery, Baylor College medial PFC (VMPFC) and anterior cingulate cortex in metabolism and perfusion of the caudate, anterior of Medicine, Houston, Texas, (ACC)), striatum and mediodorsal thalamus. USA; Sameer. Sheth@ bcm. edu cingulate cortex, thalamus and regions of prefrontal OCD treatment includes pharmacological and cortex (PFC) including the orbitofrontal cortex (OFC), cognitive–behavioural therapies (CBT) as well as http://jnnp.bmj.com/ KRB and YJP contributed dorsolateral PFC (DLPFC), ventromedial PFC (VMPFC) equally. less- common neuromodulatory strategies, which and ventrolateral PFC (VLPFC). Modulating activity may be neurosurgical (eg, stereotactic lesions and KRB and YJP are joint first within regions of the cortico- striato- thalamo- cortical deep brain stimulation (DBS)) or non- invasive (eg, authors. system may be a common therapeutic mechanism [S12- S13] transcranial magnetic stimulation, TMS). across treatments. We identify future needs and current Received 15 July 2020 This review summarises studies that examined the Revised 24 February 2021 knowledge gaps that can be mitigated by implementing brain before and after treatment to discover changes Accepted 24 March 2021 integrative methods. Future studies should incorporate in the brain that were associated with symptom on October 1, 2021 by guest. Protected copyright. a systematic, analytical approach to testing objective improvement, with the hypothesis that common correlates of treatment response to better understand neural mediators may be observed regardless of neurophysiological mechanisms of dysfunction. treatment modality. We also identify knowledge gaps and recommendations for future research. © Author(s) (or their RESULTS employer(s)) 2021. Re- use INTRODUCTION Our results are organised by treatment and subse- permitted under CC BY- NC. No Obsessive–compulsive disorder (OCD) is a chronic, quently by imaging modality. Following literature commercial re- use. See rights disabling disease characterised by recurrent, intru- review as summarised (figure 1), in total, we included and permissions. Published sive thoughts (obsessions) and/or repetitive mental by BMJ. 64 distinct studies which report changes in neuro- or physical actions (compulsions). Typical onset imaging markers following treatment and examine To cite: Bijanki KR, Pathak occurs during the childhood or adolescence and correlation with clinical outcome measured by Yale- YJ, Najera RA, et al. J Neurol often lasts through adulthood; lifetime prevalence Brown Obsessive Compulsive Scale (Y-BOC S), as Neurosurg Psychiatry Epub 1 ahead of print: [please is estimated at 2.3% in the American population. the most standardised and validated instrument to include Day Month Year]. Patients often suffer from impaired interpersonal quantify OCD symptomatology. Of the studies that doi:10.1136/jnnp-2020- relationships as a result of their symptoms, and reported significant correlations with Y-BOC S, 28 324478 unemployment rates are reported as high as 38%.2 focused on an adult cohort, 5 on a paediatric cohort Bijanki KR, et al. J Neurol Neurosurg Psychiatry 2021;0:1–11. doi:10.1136/jnnp-2020-324478 1 Neurosurgery J Neurol Neurosurg Psychiatry: first published as 10.1136/jnnp-2020-324478 on 27 April 2021. Downloaded from after SRI or TCA intervention; however, these did not correlate with symptom reduction. Three studies reported no significant change in OFC metabolism with SRI or TCA treatment (n=9 adults),3 (n=11 adults),7 (n=7 adults).12 SPECT studies found decrease in OFC perfusion bilater- ally that did not correlate with reduction in Y-BOC S (n=8 adults).22 Others noted no change in OFC metabolism after fluvoxamine (n=15 adults)11 or fluoxetine (n=6 adults).4 ► PFC/ACC: One fluoro- deoxyglucose positron emission tomography (FDG- PET) study noted decreased metabolism in the bilateral ACC that correlated with decreased Y- BOCS (n=11 adults).7 Another study reported decreased metabo- lism in the right ACC that did not, however, correlate with symptom improvement (n=9 adults).3 Several others noted no significant change in ACC metabolism corresponding Figure 1 PRISMA flow chart. OCD, obsessive–compulsive disorder; with SRI or TCA outcomes (n=13 adults),5 (n=20 adults),14 PRISMA, Preferred Reporting Items for Systematic Reviews and Meta- (n=20 adults),16 (n=8 adults).21 Analyses. ► Thalamus: One study noted a decreased metabolism in the left thalamus after fluoxetine administration; however, this finding did not correlate with Y- BOCS reduction and 1 included patients between the ages of 16–29. Within each (n=9 adults).3 Other studies that used SRI or TCA phar- section, we first summarise statistically significant results from macotherapy found no corresponding significant metabolic regions most frequently implicated in the CSTC circuit (OFC, change in the thalamus (n=20 adults),16 (n=8 adults),21 DLPFC, VMPFC, ventrolateral PFC (VLPFC), ACC, caudate (n=11 adults).7 Results from perfusion studies in the thal- and thalamus). All other regions that changed significantly are amus varied depending on treatment class. Two studies also reported. Laterality is indicated if included in table 1. At the showed rCBF decreases in the right thalamus after SRIs end of each section, we summarise the subset of results in which (n=11 adults),18 but only one reported a significant correla- neuroimaging changes correlated significantly with treatment tion with Y-BOC S improvement (n=15 adults).11 response (i.e., decreased Y-BOC S). ► Other Regions: Decreased metabolism in bilateral middle and posterior cingulate cortices correlated with Y-BOC S Pharmacotherapy reduction (n=11 adults).7 Another study found both a Studies evaluated imaging changes after administration of sero- decrease in metabolism in the right putamen, bilateral cere- 3–10 7 11 tonin reuptake inhibitors (SRIs) (fluoxetine ; fluvoxamine ; bella and right hippocampus and an increase in metabolism 8 12–17 8 9 18–20 paroxetine and other SRIs ; tricyclic antidepressants in the right lateral postcentral gyrus, posterior and superior 5 7 21 22 (TCAs) (clomipramine) and after selective SRI (SSRI) parietal lobes, and medial and superior occipital gyri after 23 24 augmentation with the atypical antipsychotic risperidone. SRI treatment (n=10 adults).8 Conversely, others noted 6 13 15 17 Patient populations ranged from treatment-naïve children, an increase in metabolism in the putamen bilaterally (n=8 24 to pharmacotherapy-resistant adults and treatment duration adults).21 These findings from these studies were not corre- 5 23 varied
Load more

Recommended publications
  • Toward a Common Terminology for the Gyri and Sulci of the Human Cerebral Cortex Hans Ten Donkelaar, Nathalie Tzourio-Mazoyer, Jürgen Mai
    Toward a Common Terminology for the Gyri and Sulci of the Human Cerebral Cortex Hans ten Donkelaar, Nathalie Tzourio-Mazoyer, Jürgen Mai To cite this version: Hans ten Donkelaar, Nathalie Tzourio-Mazoyer, Jürgen Mai. Toward a Common Terminology for the Gyri and Sulci of the Human Cerebral Cortex. Frontiers in Neuroanatomy, Frontiers, 2018, 12, pp.93. 10.3389/fnana.2018.00093. hal-01929541 HAL Id: hal-01929541 https://hal.archives-ouvertes.fr/hal-01929541 Submitted on 21 Nov 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. REVIEW published: 19 November 2018 doi: 10.3389/fnana.2018.00093 Toward a Common Terminology for the Gyri and Sulci of the Human Cerebral Cortex Hans J. ten Donkelaar 1*†, Nathalie Tzourio-Mazoyer 2† and Jürgen K. Mai 3† 1 Department of Neurology, Donders Center for Medical Neuroscience, Radboud University Medical Center, Nijmegen, Netherlands, 2 IMN Institut des Maladies Neurodégénératives UMR 5293, Université de Bordeaux, Bordeaux, France, 3 Institute for Anatomy, Heinrich Heine University, Düsseldorf, Germany The gyri and sulci of the human brain were defined by pioneers such as Louis-Pierre Gratiolet and Alexander Ecker, and extensified by, among others, Dejerine (1895) and von Economo and Koskinas (1925).
    [Show full text]
  • Quantity Determination and the Distance Effect with Letters, Numbers, and Shapes: a Functional MR Imaging Study of Number Processing
    AJNR Am J Neuroradiol 23:193–200, February 2003 Quantity Determination and the Distance Effect with Letters, Numbers, and Shapes: A Functional MR Imaging Study of Number Processing Robert K. Fulbright, Stephanie C. Manson, Pawel Skudlarski, Cheryl M. Lacadie, and John C. Gore BACKGROUND AND PURPOSE: The ability to quantify, or to determine magnitude, is an important part of number processing, and the extent to which language and other cognitive abilities are involved with number processing is an area of interest. We compared activation patterns, reaction times, and accuracy as subjects determined stimulus magnitude by ordering letters, numbers, and shapes. A second goal was to define the brain regions involved in the distance effect (the farther apart numbers are, the faster subjects are at judging which number is larger) and whether this effect depended on stimulus type. METHODS: Functional MR images were acquired in 19 healthy subjects. The order task required the subjects to judge whether three stimuli were in order according to their position in the alphabet (letters), position in the number line (numbers), or size (shapes). In the control (identify task), subjects judged whether one of the three stimuli was a particular letter, number, or shape. Each stimulus type was divided into near trials (quantity difference of three or less) and far trials (quantity difference of at least five) to assess the distance effect. RESULTS: Subjects were less accurate and slower with letters than with numbers and shapes. A distance effect was present with shapes and numbers, as subjects ordered the near trials slower than far trials. No distance effect was detected with letters.
    [Show full text]
  • 01 05 Lateral Surface of the Brain-NOTES.Pdf
    Lateral Surface of the Brain Medical Neuroscience | Tutorial Notes Lateral Surface of the Brain 1 MAP TO NEUROSCIENCE CORE CONCEPTS NCC1. The brain is the body's most complex organ. LEARNING OBJECTIVES After study of the assigned learning materials, the student will: 1. Demonstrate the four paired lobes of the cerebral cortex and describe the boundaries of each. 2. Sketch the major features of each cerebral lobe, as seen from the lateral view, identifying major gyri and sulci that characterize each lobe. NARRATIVE by Leonard E. WHITE and Nell B. CANT Duke Institute for Brain Sciences Department of Neurobiology Duke University School of Medicine Overview When you view the lateral aspect of a human brain specimen (see Figures A3A and A102), three structures are usually visible: the cerebral hemispheres, the cerebellum, and part of the brainstem (although the brainstem is not visible in the specimen photographed in lateral view for Fig. 1 below). The spinal cord has usually been severed (but we’ll consider the spinal cord later), and the rest of the subdivisions are hidden from lateral view by the hemispheres. The diencephalon and the rest of the brainstem are visible on the medial surface of a brain that has been cut in the midsagittal plane. Parts of all of the subdivisions are also visible from the ventral surface of the whole brain. Over the next several tutorials, you will find video demonstrations (from the brain anatomy lab) and photographs (in the tutorial notes) of these brain surfaces, and sufficient detail in the narrative to appreciate the overall organization of the parts of the brain that are visible from each perspective.
    [Show full text]
  • Common and Distinct Functional Brain Networks for Intuitive and Deliberate Decision Making
    brain sciences Article Common and Distinct Functional Brain Networks for Intuitive and Deliberate Decision Making Burak Erdeniz 1,* and John Done 2 1 Department of Psychology, Izmir˙ University of Economics, 35330 Izmir, Turkey 2 Department of Psychology and Sports Sciences, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL 10 9AB, UK * Correspondence: [email protected]; Tel.: +902-324-888-379 Received: 5 June 2019; Accepted: 19 July 2019; Published: 20 July 2019 Abstract: Reinforcement learning studies in rodents and primates demonstrate that goal-directed and habitual choice behaviors are mediated through different fronto-striatal systems, but the evidence is less clear in humans. In this study, functional magnetic resonance imaging (fMRI) data were collected whilst participants (n = 20) performed a conditional associative learning task in which blocks of novel conditional stimuli (CS) required a deliberate choice, and blocks of familiar CS required an intuitive choice. Using standard subtraction analysis for fMRI event-related designs, activation shifted from the dorso-fronto-parietal network, which involves dorsolateral prefrontal cortex (DLPFC) for deliberate choice of novel CS, to ventro-medial frontal (VMPFC) and anterior cingulate cortex for intuitive choice of familiar CS. Supporting this finding, psycho-physiological interaction (PPI) analysis, using the peak active areas within the PFC for novel and familiar CS as seed regions, showed functional coupling between caudate and DLPFC when processing novel CS and VMPFC when processing familiar CS. These findings demonstrate separable systems for deliberate and intuitive processing, which is in keeping with rodent and primate reinforcement learning studies, although in humans they operate in a dynamic, possibly synergistic, manner particularly at the level of the striatum.
    [Show full text]
  • Online Tables (PDF)
    On-line Table 1: Description of cortical and sulcation abnormalities in 40 patients Patient Description 1 Bilateral schizencephaly, extensive fcd, abnormal Sylvian fissures 2 Abnormal R intraparietal-occipital sulcus and open sylvian fissures, sylvian cortex and R occipital cortex 3 Unusual sulcation R postcingulate and transmantle bands to Sylvian fissures 4 Bilateral peri-Sylvian pmg, abnormal Sylvian fissures, thick and blurred cortex 5 Dysplastic L cingulate adjacent to transmantle dysplasia 6 Transmantle band left frontal and above right caudate 7 L frontal transmantle band 8 Abnormal Sylvian fissures, L Ͼ R 9 R posterior quadrantic dysplasia, abnormal posterior sulcation and R Sylvian fissure, linear band 10 Abnormal L Sylvian fissure 11 Linear bands from posterior atrium to occipital white matter, unusual stellate sulcal configuration joining R intraparietal sulcus 12 Short Sylvian fissures, absent L intra-parieto-occipital fissure and simplified gyral pattern, areas of increased cortical thickness 13 Unusual sulcation R postcentral–thick but only 3 years of age terminal zones 14 Abnormal L Sylvian fissure, abnormal sulcus from L frontal lobe joins it with stellate shape 15 Dysplastic cingulate gyrus R abnormal L calcarine with branching, N thickness, still young 16 Abnormal Sylvian fissures bilaterally, elongated with terminal branches; difficult to assess thickness because not myelinated yet 17 Abnormal L Sylvian fissure 18 Thick gray linear transmantle bands from nodules to adjacent Sylvian cortex, thickened but no pmg 19 Unusual sulcation
    [Show full text]
  • Brain Networks for Confidence Weighting and Hierarchical
    Brain networks for confidence weighting and PNAS PLUS hierarchical inference during probabilistic learning Florent Meyniela,1 and Stanislas Dehaenea,b,1 aCognitive Neuroimaging Unit, NeuroSpin Center, Institute of Life Sciences Frédéric Joliot, Fundemental Research Division, Commissariat à l’Énergie Atomique et aux Énergies Alternatives, INSERM, Université Paris–Sud, Université Paris–Saclay, 91191 Gif/Yvette, France; and bChair of Experimental Cognitive Psychology, Collège de France, 75005 Paris, France Contributed by Stanislas Dehaene, March 20, 2017 (sent for review September 23, 2016; reviewed by Stephen M. Fleming and Charles R. Gallistel) Learning is difficult when the world fluctuates randomly and and normative solution to this problem requires weighting each ceaselessly. Classical learning algorithms, such as the delta rule with source of information according to its reliability (3–12). According constant learning rate, are not optimal. Mathematically, the optimal to this Bayes-optimal solution, any discrepancy between a new ob- learning rule requires weighting prior knowledge and incoming servation and a learned estimate should lead to an update of this evidence according to their respective reliabilities. This “confidence internal estimate, but the size of this update should decrease as the weighting” implies the maintenance of an accurate estimate of the prior confidence in this internal estimate increases. Furthermore, reliability of what has been learned. Here, using fMRI and an ideal- this prior confidence should depend on two factors: the precision of observer analysis, we demonstrate that the brain’s learning algorithm the current internal estimate and a discounting factor that takes into relies on confidence weighting. While in the fMRI scanner, human account the possibility that a change occurred.
    [Show full text]
  • Neural Arbitration Between Social and Individual Learning Systems
    RESEARCH ARTICLE Neural arbitration between social and individual learning systems Andreea Oliviana Diaconescu1,2,3,4†*, Madeline Stecy1,2,5†, Lars Kasper1,2,6, Christopher J Burke2, Zoltan Nagy2, Christoph Mathys1,7,8, Philippe N Tobler2 1Translational Neuromodeling Unit, Institute for Biomedical Engineering, University of Zurich & ETH Zurich, Zurich, Switzerland; 2Laboratory for Social and Neural Systems Research, Department of Economics, University of Zurich, Zurich, Switzerland; 3University of Basel, Department of Psychiatry (UPK), Basel, Switzerland; 4Krembil Centre for Neuroinformatics, Centre for Addiction and Mental Health (CAMH), University of Toronto, Toronto, Canada; 5Rutgers Robert Wood Johnson Medical School, New Brunswick, United States; 6Institute for Biomedical Engineering, MRI Technology Group, ETH Zu¨ rich & University of Zurich, Zurich, Switzerland; 7Interacting Minds Centre, Aarhus University, Aarhus, Denmark; 8Scuola Internazionale Superiore di Studi Avanzati (SISSA), Trieste, Italy Abstract Decision making requires integrating knowledge gathered from personal experiences with advice from others. The neural underpinnings of the process of arbitrating between information sources has not been fully elucidated. In this study, we formalized arbitration as the relative precision of predictions, afforded by each learning system, using hierarchical Bayesian modeling. In a probabilistic learning task, participants predicted the outcome of a lottery using recommendations from a more informed advisor and/or self-sampled outcomes.
    [Show full text]
  • Parietal Dysgraphia: Characterization of Abnormal Writing Stroke Sequences, Character Formation and Character Recall
    Behavioural Neurology 18 (2007) 99–114 99 IOS Press Parietal dysgraphia: Characterization of abnormal writing stroke sequences, character formation and character recall Yasuhisa Sakuraia,b,∗, Yoshinobu Onumaa, Gaku Nakazawaa, Yoshikazu Ugawab, Toshimitsu Momosec, Shoji Tsujib and Toru Mannena aDepartment of Neurology, Mitsui Memorial Hospital, Tokyo, Japan bDepartment of Neurology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan cDepartment of Radiology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan Abstract. Objective: To characterize various dysgraphic symptoms in parietal agraphia. Method: We examined the writing impairments of four dysgraphia patients from parietal lobe lesions using a special writing test with 100 character kanji (Japanese morphograms) and their kana (Japanese phonetic writing) transcriptions, and related the test performance to a lesion site. Results: Patients 1 and 2 had postcentral gyrus lesions and showed character distortion and tactile agnosia, with patient 1 also having limb apraxia. Patients 3 and 4 had superior parietal lobule lesions and features characteristic of apraxic agraphia (grapheme deformity and a writing stroke sequence disorder) and character imagery deficits (impaired character recall). Agraphia with impaired character recall and abnormal grapheme formation were more pronounced in patient 4, in whom the lesion extended to the inferior parietal, superior occipital and precuneus gyri. Conclusion: The present findings and a review of the literature suggest that: (i) a postcentral gyrus lesion can yield graphemic distortion (somesthetic dysgraphia), (ii) abnormal grapheme formation and impaired character recall are associated with lesions surrounding the intraparietal sulcus, the symptom being more severe with the involvement of the inferior parietal, superior occipital and precuneus gyri, (iii) disordered writing stroke sequences are caused by a damaged anterior intraparietal area.
    [Show full text]
  • True and False Recognition Memories of Odors Induce Distinct Neural Signatures
    ORIGINAL RESEARCH ARTICLE published: 21 July 2011 HUMAN NEUROSCIENCE doi: 10.3389/fnhum.2011.00065 True and false recognition memories of odors induce distinct neural signatures Jean-Pierre Royet1*, Léri Morin-Audebrand 2,3, Barbara Cerf-Ducastel 4, Lori Haase 4, Sylvie Issanchou 2, Claire Murphy 4, Pierre Fonlupt 5, Claire Sulmont-Rossé 2 and Jane Plailly1 1 INSERM, U1028, UMR5292 CNRS, Lyon Neuroscience Research Center, Université Lyon, Lyon, France 2 Centre des Sciences du Goût et de l’Alimentation, UMR6265 CNRS, UMR1324 INRA, Université de Bourgogne, Dijon, France 3 Institute of Life Technologies, University of Applied Sciences Valais, Sion, Switzerland 4 Lifespan Human Senses Laboratory, Department of Psychology, San Diego State University, San Diego, CA, USA 5 Dynamique Cérébrale et Cognition, INSERM, U280, University Lyon1, Lyon, France Edited by: Neural bases of human olfactory memory are poorly understood. Very few studies have Hans-Jochen Heinze, University of examined neural substrates associated with correct odor recognition, and none has tackled Magdeburg, Germany neural networks associated with incorrect odor recognition. We investigated the neural basis Reviewed by: Leslie J. Carver, University of California, of task performance during a yes–no odor recognition memory paradigm in young and elderly USA subjects using event-related functional magnetic resonance imaging. We explored four response Mercedes Atienza, University Pablo de categories: correct (Hit) and incorrect false alarm (FA) recognition, as well as correct (CR) and Olavide, Spain incorrect (Miss) rejection, and we characterized corresponding brain responses using multivariate *Correspondence: analysis and linear regression analysis. We hypothesized that areas of the medial temporal lobe Jean-Pierre Royet, INSERM, U1028, UMR5292 CNRS, Lyon Neuroscience were differentially involved depending on the accuracy of odor recognition.
    [Show full text]
  • Shape-Specific Activation of Occipital Cortex in an Early Blind
    Neuropsychologia ] (]]]]) ]]]–]]] 1 Contents lists available at SciVerse ScienceDirect 2 3 4 Neuropsychologia 5 6 journal homepage: www.elsevier.com/locate/neuropsychologia 7 8 9 10 11 12 Shape-specific activation of occipital cortex in an early blind 13 echolocation expert 14 a,n b c d c 15 Q1 Stephen R. Arnott , Lore Thaler , Jennifer Milne , Daniel Kish , Melvyn A. Goodale 16 a 17 The Rotman Research Institute, Baycrest, 3560 Bathurst Street, Toronto, Ontario, Canada, M6A 2E1 b 18 Department of Psychology, Durham University, Durham, UK c Department of Psychology, Western University, London, Ontario, Canada, N6A 5C2 19 d World Access for the Blind, Encino, California 91316, USA 20 21 22 article info abstract 23 24 Article history: We have previously reported that an early-blind echolocating individual (EB) showed robust occipital 25 Received 22 June 2012 activation when he identified distant, silent objects based on echoes from his tongue clicks (Thaler, 26 Received in revised form Arnott, & Goodale, 2011). In the present study we investigated the extent to which echolocation 27 21 January 2013 activation in EB’s occipital cortex reflected general echolocation processing per se versus feature- Accepted 27 January 2013 28 specific processing. In the first experiment, echolocation audio sessions were captured with in-ear 29 microphones in an anechoic chamber or hallway alcove as EB produced tongue clicks in front of a 30 Keywords: concave or flat object covered in aluminum foil or a cotton towel. All eight echolocation sessions Auditory (2 shapes  2 surface materials  2 environments) were then randomly presented to him during a sparse- 31 Blind temporal scanning fMRI session.
    [Show full text]
  • Functional Anatomy of the Inferior Longitudinal Fasciculus: from Historical Reports to Current Hypotheses Guillaume Herbet, Ilyess Zemmoura, Hugues Duffau
    Functional Anatomy of the Inferior Longitudinal Fasciculus: From Historical Reports to Current Hypotheses Guillaume Herbet, Ilyess Zemmoura, Hugues Duffau To cite this version: Guillaume Herbet, Ilyess Zemmoura, Hugues Duffau. Functional Anatomy of the Inferior Longitudinal Fasciculus: From Historical Reports to Current Hypotheses. Frontiers in Neuroanatomy, Frontiers, 2018, 12, pp.77. 10.3389/fnana.2018.00077. hal-02313966 HAL Id: hal-02313966 https://hal.archives-ouvertes.fr/hal-02313966 Submitted on 7 Jun 2021 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License fnana-12-00077 September 17, 2018 Time: 10:22 # 1 REVIEW published: 19 September 2018 doi: 10.3389/fnana.2018.00077 Functional Anatomy of the Inferior Longitudinal Fasciculus: From Historical Reports to Current Hypotheses Guillaume Herbet1,2,3*, Ilyess Zemmoura4,5 and Hugues Duffau1,2,3 1 Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France, 2 INSERM-1051, Team 4, Saint-Eloi Hospital, Institute for Neurosciences of Montpellier, Montpellier, France, 3 University of Montpellier, Montpellier, France, 4 Department of Neurosurgery, Tours University Medical Center, Tours, France, 5 UMR 1253, iBrain, INSERM, University of Tours, Tours, France The inferior longitudinal fasciculus (ILF) is a long-range, associative white matter pathway that connects the occipital and temporal-occipital areas of the brain to the anterior temporal areas.
    [Show full text]
  • Differential Sensitivity of Human Visual Cortex to Faces, Letterstrings, and Textures: a Functional Magnetic Resonance Imaging Study
    The Journal of Neuroscience, August 15, 1996, 16(16):5205–5215 Differential Sensitivity of Human Visual Cortex to Faces, Letterstrings, and Textures: A Functional Magnetic Resonance Imaging Study Aina Puce,1,2 Truett Allison,1,3 Maryam Asgari,1 John C. Gore,4 and Gregory McCarthy1,2,3 1Neuropsychology Laboratory, Veterans Affairs Medical Center, West Haven, Connecticut 06516, and Departments of 2Surgery (Neurosurgery), 3Neurology, and 4Diagnostic Radiology, Yale University School of Medicine, New Haven, Connecticut 06510 Twelve normal subjects viewed alternating sequences of unfa- occipital sulci. Textures primarily activated portions of the col- miliar faces, unpronounceable nonword letterstrings, and tex- lateral sulcus. In the left hemisphere, 9 of the 12 subjects tures while echoplanar functional magnetic resonance images showed a characteristic pattern in which faces activated a were acquired in seven slices extending from the posterior discrete region of the lateral fusiform gyrus, whereas letter- margin of the splenium to near the occipital pole. These stimuli strings activated a nearby region of cortex within the occipito- were chosen to elicit initial category-specific processing in temporal and inferior occipital sulci. These results suggest that extrastriate cortex while minimizing semantic processing. Over- different regions of ventral extrastriate cortex are specialized for all, faces evoked more activation than did letterstrings. Com- processing the perceptual features of faces and letterstrings, paring hemispheres, faces evoked greater activation in the right and that these regions are intermediate between earlier pro- than the left hemisphere, whereas letterstrings evoked greater cessing in striate and peristriate cortex, and later lexical, se- activation in the left than the right hemisphere.
    [Show full text]