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Peña-Casanova J, Sánchez-Benavides G, Sigg-Alonso J. Updating functional brain units: Insights far beyond Luria. Cortex 2024; 174:19-69. [PMID: 38492440 DOI: 10.1016/j.cortex.2024.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 01/15/2024] [Accepted: 02/15/2024] [Indexed: 03/18/2024]
Abstract
This paper reviews Luria's model of the three functional units of the brain. To meet this objective, several issues were reviewed: the theory of functional systems and the contributions of phylogenesis and embryogenesis to the brain's functional organization. This review revealed several facts. In the first place, the relationship/integration of basic homeostatic needs with complex forms of behavior. Secondly, the multi-scale hierarchical and distributed organization of the brain and interactions between cells and systems. Thirdly, the phylogenetic role of exaptation, especially in basal ganglia and cerebellum expansion. Finally, the tripartite embryogenetic organization of the brain: rhinic, limbic/paralimbic, and supralimbic zones. Obviously, these principles of brain organization are in contradiction with attempts to establish separate functional brain units. The proposed new model is made up of two large integrated complexes: a primordial-limbic complex (Luria's Unit I) and a telencephalic-cortical complex (Luria's Units II and III). As a result, five functional units were delineated: Unit I. Primordial or preferential (brainstem), for life-support, behavioral modulation, and waking regulation; Unit II. Limbic and paralimbic systems, for emotions and hedonic evaluation (danger and relevance detection and contribution to reward/motivational processing) and the creation of cognitive maps (contextual memory, navigation, and generativity [imagination]); Unit III. Telencephalic-cortical, for sensorimotor and cognitive processing (gnosis, praxis, language, calculation, etc.), semantic and episodic (contextual) memory processing, and multimodal conscious agency; Unit IV. Basal ganglia systems, for behavior selection and reinforcement (reward-oriented behavior); Unit V. Cerebellar systems, for the prediction/anticipation (orthometric supervision) of the outcome of an action. The proposed brain units are nothing more than abstractions within the brain's simultaneous and distributed physiological processes. As function transcends anatomy, the model necessarily involves transition and overlap between structures. Beyond the classic approaches, this review includes information on recent systemic perspectives on functional brain organization. The limitations of this review are discussed.
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Affiliation(s)
- Jordi Peña-Casanova
- Integrative Pharmacology and Systems Neuroscience Research Group, Neuroscience Program, Hospital del Mar Medical Research Institute, Barcelona, Spain; Department of Psychiatry and Legal Medicine, Autonomous University of Barcelona, Bellaterra, Barcelona, Spain; Test Barcelona Services, Teià, Barcelona, Spain.
| | | | - Jorge Sigg-Alonso
- Department of Behavioral and Cognitive Neurobiology, Institute of Neurobiology, National Autonomous University of México (UNAM), Queretaro, Mexico
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Tagliaferri M, Amorosino G, Voltolini L, Giampiccolo D, Avesani P, Cattaneo L. A revision of the dorsal origin of the frontal aslant tract (FAT) in the superior frontal gyrus: a DWI-tractographic study. Brain Struct Funct 2024; 229:987-999. [PMID: 38502328 DOI: 10.1007/s00429-024-02778-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 02/19/2024] [Indexed: 03/21/2024]
Abstract
The frontal aslant tract (FAT) is a white matter tract connecting the superior frontal gyrus (SFG) to the inferior frontal gyrus (IFG). Its dorsal origin is identified in humans in the medial wall of the SFG, in the supplementary motor complex (SM-complex). However, empirical observation shows that many FAT fibres appear to originate from the dorsal, rather than medial, portion of the SFG. We quantitatively investigated the actual origin of FAT fibres in the SFG, specifically discriminating between terminations in the medial wall and in the convexity of the SFG. We analysed data from 105 subjects obtained from the Human Connectome Project (HCP) database. We parcelled the cortex of the IFG, dorsal SFG and medial SFG in several regions of interest (ROIs) ordered in a caudal-rostral direction, which served as seed locations for the generation of streamlines. Diffusion imaging data (DWI) was processed using a multi-shell multi-tissue CSD-based algorithm. Results showed that the number of streamlines originating from the dorsal wall of the SFG significantly exceeds those from the medial wall of the SFG. Connectivity patterns between ROIs indicated that FAT sub-bundles are segregated in parallel circuits ordered in a caudal-rostral direction. Such high degree of coherence in the streamline trajectory allows to establish pairs of homologous cortical parcels in the SFG and IFG. We conclude that the frontal origin of the FAT is found in both dorsal and medial surfaces of the superior frontal gyrus.
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Affiliation(s)
- Marco Tagliaferri
- Centro Interdipartimentale Mente e Cervello (CIMeC), University of Trento, Trento, Italy
| | - Gabriele Amorosino
- Centro Interdipartimentale Mente e Cervello (CIMeC), University of Trento, Trento, Italy
- Neuroinformatics Laboratory, Center for Digital Health & Well Being, Fondazione Bruno Kessler, Trento, Italy
| | - Linda Voltolini
- Centro Interdipartimentale Mente e Cervello (CIMeC), University of Trento, Trento, Italy
| | - Davide Giampiccolo
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, University College London, London, UK
- Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
- Institute of Neuroscience, Cleveland Clinic London, Grosvenor Place, London, UK
| | - Paolo Avesani
- Centro Interdipartimentale Mente e Cervello (CIMeC), University of Trento, Trento, Italy
- Neuroinformatics Laboratory, Center for Digital Health & Well Being, Fondazione Bruno Kessler, Trento, Italy
| | - Luigi Cattaneo
- Centro Interdipartimentale Mente e Cervello (CIMeC), University of Trento, Trento, Italy.
- Centro Interdipartimentale di Scienze Mediche (CISMed) - University of Trento, Trento, Italy.
- Center for Mind/Brain Sciences (CIMeC) - Center for Medical Sciences (CISMed), University of Trento Center for Medical Sciences (CISMed), Via delle Regole 101, Trento, 38123, Italy.
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Drosos E, Komaitis S, Liouta E, Neromyliotis E, Charalampopoulou E, Anastasopoulos L, Kalamatianos T, Skandalakis GP, Troupis T, Stranjalis G, Kalyvas AV, Koutsarnakis C. Parcellating the vertical associative fiber network of the temporoparietal area: Evidence from focused anatomic fiber dissections. BRAIN & SPINE 2024; 4:102759. [PMID: 38510613 PMCID: PMC10951769 DOI: 10.1016/j.bas.2024.102759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 01/17/2024] [Accepted: 01/21/2024] [Indexed: 03/22/2024]
Abstract
Introduction The connectivity of the temporoparietal (TP) region has been the subject of multiple anatomical and functional studies. Its role in high cognitive functions has been primarily correlated with long association fiber connections. As a major sensory integration hub, coactivation of areas within the TP requires a stream of short association fibers running between its subregions. The latter have been the subject of a small number of recent in vivo and cadaveric studies. This has resulted in limited understanding of this network and, in certain occasions, terminology ambiguity. Research question To systematically study the vertical parietal and temporoparietal short association fibers. Material and methods Thirteen normal, adult cadaveric hemispheres, were treated with the Klinger's freeze-thaw process and their subcortical anatomy was studied using the microdissection technique. Results Two separate fiber layers were identified. Superficially, directly beneath the cortical u-fibers, the Stratum proprium intraparietalis (SP) was seen connecting Superior Parietal lobule and Precuneal cortical areas to inferior cortical regions of the Parietal lobe, running deep to the Intraparietal sulcus. At the same dissection level, the IPL-TP fibers were identified as a bundle connecting the Inferior Parietal lobule with posterior Temporal cortical areas. At a deeper level, parallel to the Arcuate fasciculus fibers, the SPL-TP fibers were seen connecting the Superior Parietal lobule to posterior Temporal cortical areas. Discussion and conclusion To our knowledge this is the first cadaveric dissection study to comprehensively study and describe of the vertical association fibers of the temporoparietal region while proposing a universal terminology.
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Affiliation(s)
- Evangelos Drosos
- Manchester Centre for Clinical Neurosciences, Northern Care Alliance NHS FT, Manchester, UK
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Department of Anatomy, National and Kapodistrian University of Athens, Athens, Greece
| | - Spyridon Komaitis
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Centre for Spinal Studies and Surgery, Queen's Medical Centre, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Evangelia Liouta
- Hellenic Center for Neurosurgical Research “Prof. Petros Kokkalis”, Athens, Greece
| | - Eleftherios Neromyliotis
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Department of Neurosurgery, National and Kapodistrian University of Athens, Evangelismos Hospital, Athens, Greece
| | - Eirini Charalampopoulou
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Department of Neurosurgery, National and Kapodistrian University of Athens, Evangelismos Hospital, Athens, Greece
| | - Lykourgos Anastasopoulos
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Department of Neurosurgery, National and Kapodistrian University of Athens, Evangelismos Hospital, Athens, Greece
| | - Theodosis Kalamatianos
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Hellenic Center for Neurosurgical Research “Prof. Petros Kokkalis”, Athens, Greece
| | - Georgios P. Skandalakis
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Department of Neurosurgery, National and Kapodistrian University of Athens, Evangelismos Hospital, Athens, Greece
| | - Theodoros Troupis
- Department of Anatomy, National and Kapodistrian University of Athens, Athens, Greece
| | - George Stranjalis
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Hellenic Center for Neurosurgical Research “Prof. Petros Kokkalis”, Athens, Greece
- Department of Neurosurgery, National and Kapodistrian University of Athens, Evangelismos Hospital, Athens, Greece
| | - Aristotelis V. Kalyvas
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Division of Neurosurgery, Department of Surgery, University Health Network, University of Toronto, Toronto, Canada
| | - Christos Koutsarnakis
- Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens, Athens, Greece
- Hellenic Center for Neurosurgical Research “Prof. Petros Kokkalis”, Athens, Greece
- Department of Neurosurgery, National and Kapodistrian University of Athens, Evangelismos Hospital, Athens, Greece
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Yi X, Xiao Q, Fu Y, Wang X, Shen L, Ding J, Jiang F, Wang J, Zhang Z, Chen BT. Association of white matter microstructural alteration with non-suicidal self-injury behavior and visual working memory in adolescents with borderline personality disorder. Psychiatry Res 2024; 331:115619. [PMID: 38048646 DOI: 10.1016/j.psychres.2023.115619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/13/2023] [Accepted: 11/18/2023] [Indexed: 12/06/2023]
Abstract
BACKGROUND Non-suicidal self-injurious behavior (NSSI) is the core characteristic of adolescent borderline personality disorder (BPD) and visual working memory is involved in the pathological processes of BPD. This study aimed to investigate alterations in white matter microstructure and their association with NSSI and visual working memory in adolescents with BPD. METHODS 53 adolescents diagnosed with BPD and 39 healthy controls (HCs) were enrolled. White matter microstructure was assessed with the fractional anisotropy (FA) and mean diffusivity (MD) from diffusion tensor imaging (DTI). Correlation analysis was performed to assess the association between FA/MD and core features of BPD. A mediation analysis was performed to test whether the effects of white matter alterations on NSSI could be mediated by visual working memory. RESULTS Adolescents with BPD showed a reduced FA and an increased MD in the cortical-limbic and cortical-thalamus circuit when compared to the HCs (p < 0.05). Increased MD was positively correlated with NSSI, impulse control and identity disturbance (p < 0.05), and was negatively correlated with the score of visual reproduction. Reserved visual working memory masked the effects of white matter microstructural alterations on NSSI behavior. CONCLUSIONS White matter microstructural deficits in the cortical-limbic and cortical-thalamus circuits may be associated with NSSI and visual working memory in adolescents with BPD. Reserved visual working memory may protect against NSSI.
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Affiliation(s)
- Xiaoping Yi
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China; National Clinical Research Center for Geriatric Disorders (Xiangya Hospital), Central South University, Changsha, Hunan 410008, PR China; National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology, Xiangya Hospital, Changsha, Hunan 410008, PR China; Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China; Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China; Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Qian Xiao
- Mental Health Center of Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, Hunan 410008, PR China.
| | - Yan Fu
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Xueying Wang
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Liying Shen
- Mental Health Center of Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, Hunan 410008, PR China
| | - Jun Ding
- Department of Public Health, Shenzhen Mental Health Center, Shenzhen Kangning Hospital, Shenzhen, Guangdong, PR China
| | - Furong Jiang
- Mental Health Center of Xiangya Hospital, Central South University, No. 87 Xiangya Road, Changsha, Hunan 410008, PR China
| | - Jing Wang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Zhejia Zhang
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Bihong T Chen
- Department of Diagnostic Radiology, City of Hope National Medical Center, Duarte, CA 91010, USA
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Thom RP, Canales C, Tresvalles M, McDougle CJ, Hooker JM, Chen Y, Zürcher NR. Neuroimaging research in Williams syndrome: Beginning to bridge the gap with clinical care. Neurosci Biobehav Rev 2023; 153:105364. [PMID: 37598875 DOI: 10.1016/j.neubiorev.2023.105364] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/28/2023] [Accepted: 08/15/2023] [Indexed: 08/22/2023]
Abstract
Williams syndrome (WS) is a genetic disorder affecting multiple organ systems. Cardinal features include cardiovascular disease, distinct facies, and a unique cognitive profile characterized by intellectual disability, hypersociability, and visuospatial weaknesses. Here, we synthesize neuroimaging research in WS with a focus on how the current literature and future work may be leveraged to improve health and quality of life in WS. More than 80 neuroimaging studies in WS have been conducted, the vast majority of which have focused on identifying morphometric brain differences. Aside from decreased volume of the parieto-occipital region and increased cerebellar volume, morphometric findings have been variable across studies. fMRI studies investigating the visuospatial deficit have identified dorsal stream dysfunction and abnormal activation of the hippocampal formation. Minimal work has been done using PET or MRS. Future approaches that conduct neuroimaging in tandem with clinical phenotyping, utilize novel imaging techniques to visualize brain vasculature or provide biochemical and molecular information, and include more homogenous age groups across the lifespan, have significant potential to advance clinical care.
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Affiliation(s)
- Robyn P Thom
- Lurie Center for Autism, 1 Maguire Road, Lexington, MA 02421, USA; Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA; Department of Psychiatry, Harvard Medical School, 25 Shattuck St, Boston, MA 02115, USA.
| | - Camila Canales
- Lurie Center for Autism, 1 Maguire Road, Lexington, MA 02421, USA; Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA
| | - Mary Tresvalles
- Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA; Georgetown University School of Medicine, 3900 Reservoir Rd NW, Washington, DC 20007, USA
| | - Christopher J McDougle
- Lurie Center for Autism, 1 Maguire Road, Lexington, MA 02421, USA; Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA; Department of Psychiatry, Harvard Medical School, 25 Shattuck St, Boston, MA 02115, USA
| | - Jacob M Hooker
- Lurie Center for Autism, 1 Maguire Road, Lexington, MA 02421, USA; Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA; Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Yachin Chen
- Lurie Center for Autism, 1 Maguire Road, Lexington, MA 02421, USA; Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA; Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
| | - Nicole R Zürcher
- Lurie Center for Autism, 1 Maguire Road, Lexington, MA 02421, USA; Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA; Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
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Sufianov A, Gonzalez-Lopez P, Simfukwe K, Martorell-Llobregat C, Iakimov IA, Sufianov RA, Mastronardi L, Borba LAB, Rangel CC, Forlizzi V, Campero A, Baldoncini M. Clinical and anatomical analysis of the epileptogenic spread patterns in focal cortical dysplasia patients. Surg Neurol Int 2023; 14:291. [PMID: 37680931 PMCID: PMC10481808 DOI: 10.25259/sni_210_2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 07/07/2023] [Indexed: 09/09/2023] Open
Abstract
Background Focal cortical dysplasia (FCD) is one of the main causes of intractable epilepsy, which is amendable by surgery. During the surgical management of FCD, the understanding of its epileptogenic foci, interconnections, and spreading pathways is crucial for attaining a good postoperative seizure free outcome. Methods We retrospectively evaluated 54 FCD patients operated in Federal Center of Neurosurgery, Tyumen, Russia. The electroencephalogram findings were correlated to the involved brain anatomical areas. Subsequently, we analyzed the main white matter tracts implicated during the epileptogenic spreading in some representative cases. We prepared 10 human hemispheres using Klinger's method and dissected them through the fiber dissection technique. Results The clinical results were displayed and the main white matter tracts implicated in the seizure spread were described in 10 patients. Respective FCD foci, interconnections, and ectopic epileptogenic areas in each patient were discussed. Conclusion A strong understanding of the main implicated tracts in epileptogenic spread in FCD patient remains cardinal for neurosurgeons dealing with epilepsy. To achieve meaningful seizure freedom, despite the focal lesion resection, the interconnections and tracts should be understood and somehow disconnected to stop the spreading.
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Affiliation(s)
- Albert Sufianov
- Department of Neurosurgery, Federal Center of Neurosurgery, Tyumen, Russian Federation
| | - Pablo Gonzalez-Lopez
- Department of Neurosurgery, Hospital General Universitario de Alicante, Alicante, Spain
| | - Keith Simfukwe
- Department of Neurosurgery, First Moscow Medical University, Moscow, Russian Federation
| | | | - Iurii A. Iakimov
- Department of Neurosurgery, First Moscow Medical University, Moscow, Russian Federation
| | - Rinat A. Sufianov
- Department of Neurosurgery, First Moscow Medical University, Moscow, Russian Federation
| | | | - Luis A. B. Borba
- Department of Neurosurgery, Mackenzie Evangelical University Hospital, Curitiba, Parana, Brazil
| | - Carlos Castillo Rangel
- Department of Neurosurgery, Institute of Security and Social Services for State Workers (ISSSTE), Mexico City, Mexico
| | - Valeria Forlizzi
- Laboratory of Microsurgical Neuroanatomy, Second Chair of Gross Anatomy, School of Medicine, University of Buenos Aires, Buenos Aires, Argentina
| | - Alvaro Campero
- Department of Neurosurgery, Hospital Padilla de Tucuman, Tucuman, Argentina
| | - Matias Baldoncini
- Department of Neurosurgery, San Fernando Hospital, San Fernando, Argentina
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Burkhardt E, Zemmoura I, Hirsch F, Lemaitre AL, Deverdun J, Moritz-Gasser S, Duffau H, Herbet G. The central role of the left inferior longitudinal fasciculus in the face-name retrieval network. Hum Brain Mapp 2023; 44:3254-3270. [PMID: 37051699 PMCID: PMC10171495 DOI: 10.1002/hbm.26279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 02/18/2023] [Accepted: 03/06/2023] [Indexed: 04/14/2023] Open
Abstract
Unsuccessful retrieval of proper names (PNs) is commonly observed in patients suffering from neurological conditions such as stroke or epilepsy. While a large body of works has suggested that PN retrieval relies on a cortical network centered on the left anterior temporal lobe (ATL), much less is known about the white matter connections underpinning this process. Sparse studies provided evidence for a possible role of the uncinate fasciculus, but the inferior longitudinal fasciculus (ILF) might also contribute, since it mainly projects into the ATL, interconnects it with the posterior lexical interface and is engaged in common name (CN) retrieval. To ascertain this hypothesis, we assessed 58 patients having undergone a neurosurgery for a left low-grade glioma by means of a famous face naming (FFN) task. The behavioural data were processed following a multilevel lesion approach, including location-based analyses, voxel-based lesion-symptom mapping (VLSM) and disconnection-symptom mapping. Different statistical models were generated to control for sociodemographic data, familiarity, biographical knowledge and control cognitive performances (i.e., semantic and episodic memory and CN retrieval). Overall, VLSM analyses indicated that damage to the mid-to-anterior part of the ventro-basal temporal cortex was especially associated with PN retrieval deficits. As expected, tract-oriented analyses showed that the left ILF was the most strongly associated pathway. Our results provide evidence for the pivotal role of the ILF in the PN retrieval network. This novel finding paves the way for a better understanding of the pathophysiological bases underlying PN retrieval difficulties in the various neurological conditions marked by white matter abnormalities.
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Affiliation(s)
- Eléonor Burkhardt
- Praxiling Laboratory, UMR5267, CNRS & Paul Valéry University, Montpellier, France
| | - Ilyess Zemmoura
- UMR1253, iBrain, University of Tours, INSERM, Tours, France
- Department of Neurosurgery, Bretonneau Hospital, CHRU de Tours, Tours, France
| | - Fabrice Hirsch
- Praxiling Laboratory, UMR5267, CNRS & Paul Valéry University, Montpellier, France
| | - Anne-Laure Lemaitre
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
| | - Jeremy Deverdun
- Department of Neuroradiology, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
- I2FH, Institut d'Imagerie Fonctionnelle Humaine, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
| | - Sylvie Moritz-Gasser
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
| | - Hugues Duffau
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
| | - Guillaume Herbet
- Praxiling Laboratory, UMR5267, CNRS & Paul Valéry University, Montpellier, France
- Institute of Functional Genomics, University of Montpellier, CNRS, INSERM, Montpellier, France
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
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Shekari E, Nozari N. A narrative review of the anatomy and function of the white matter tracts in language production and comprehension. Front Hum Neurosci 2023; 17:1139292. [PMID: 37051488 PMCID: PMC10083342 DOI: 10.3389/fnhum.2023.1139292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 02/24/2023] [Indexed: 03/28/2023] Open
Abstract
Much is known about the role of cortical areas in language processing. The shift towards network approaches in recent years has highlighted the importance of uncovering the role of white matter in connecting these areas. However, despite a large body of research, many of these tracts' functions are not well-understood. We present a comprehensive review of the empirical evidence on the role of eight major tracts that are hypothesized to be involved in language processing (inferior longitudinal fasciculus, inferior fronto-occipital fasciculus, uncinate fasciculus, extreme capsule, middle longitudinal fasciculus, superior longitudinal fasciculus, arcuate fasciculus, and frontal aslant tract). For each tract, we hypothesize its role based on the function of the cortical regions it connects. We then evaluate these hypotheses with data from three sources: studies in neurotypical individuals, neuropsychological data, and intraoperative stimulation studies. Finally, we summarize the conclusions supported by the data and highlight the areas needing further investigation.
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Affiliation(s)
- Ehsan Shekari
- Department of Neuroscience, Iran University of Medical Sciences, Tehran, Iran
| | - Nazbanou Nozari
- Department of Psychology, Carnegie Mellon University, Pittsburgh, PA, United States
- Center for the Neural Basis of Cognition (CNBC), Pittsburgh, PA, United States
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9
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Wu Y, Liu J, Yu G, Jv R, Wang Y, Zang P. Association fiber tracts related to Broca’s area: A comparative study based on diffusion spectrum imaging and fiber dissection. Front Neurosci 2022; 16:978912. [PMID: 36419463 PMCID: PMC9676966 DOI: 10.3389/fnins.2022.978912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 10/03/2022] [Indexed: 11/09/2022] Open
Abstract
Broca’s area, made up of Brodmann areas (BA) 44 and 45 in the ventrolateral frontal region, is associated with language production and articulation. A comprehensive network analysis of Broca’s area is necessary for understanding language function, which is still lacking. In this study, we attempted to investigate the association fiber tracts related to Broca’s area using both diffusion spectrum imaging (DSI) and postmortem fiber dissection. DSI was performed on 10 healthy subjects and an atlas comprising the average data of 842 healthy subjects from the Human Connectome Project. Fiber dissection was implemented in 10 cerebral hemispheres of cadaver donors. The following five association fiber tracts related to Broca’s area were identified: first, the distinct fasciculus of the inferior fronto-occipital fasciculus (IFOF), from Broca’s area (BA44, BA45) and pars orbitalis (BA47) to the parietal and occipital lobes; second, the ventral superior longitudinal fasciculus (SLF-III), from the supramarginal gyrus (BA40) to the ventral precentral gyrus (PreG, BA6) and posterior Broca’s area (BA44); third, the arcuate fascicle (AF), from the superior, middle, and inferior temporal gyrus (BA20, BA21, BA22) to Broca’s area (BA44, BA45) and ventral PreG; fourth, the frontal aslant tract (FAT), from Broca’s area (BA44, BA45) to the lateral superior frontal gyrus (SFG), medial SFG, and supplementary motor area (BA6, BA8, BA9); and fifth, the frontal longitudinal fasciculus (FLF), a novel intralobar frontal association fiber tract, from the anterior part of the middle frontal gyrus (MFG, BA46) and Broca’s area (BA45) to the caudal MFG (BA8), caudal SFG, and dorsal PreG (BA6). Moreover, compared with the left FAT, the right FAT covered almost the entire inferior frontal gyrus (BA44, BA45, BA47). The cross validation between DSI and fiber dissection revealed a good consistence in the association fiber tracts of Broca’s area. Combining DSI and fiber dissection, this study first identified five association fiber tracts related to Broca’s area and characterized their structure and anatomy comprehensively. The frameworks provided key elements for functional research in Broca’s area.
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Affiliation(s)
- Yupeng Wu
- Third Department of Neurosurgery, The People’s Hospital of China Medical University and the People’s Hospital of Liaoning Province, Shenyang, China
| | - Jihui Liu
- Third Department of Neurosurgery, The People’s Hospital of China Medical University and the People’s Hospital of Liaoning Province, Shenyang, China
| | - Guoning Yu
- The People’s Hospital of China Medical University and the People’s Hospital of Liaoning Province, Shenyang, China
| | - Ronghui Jv
- Department of Radiology, The People’s Hospital of China Medical University and the People’s Hospital of Liaoning Province, Shenyang, China
| | - Yibao Wang
- Department of Neurosurgery, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Peizhuo Zang
- Third Department of Neurosurgery, The People’s Hospital of China Medical University and the People’s Hospital of Liaoning Province, Shenyang, China
- *Correspondence: Peizhuo Zang,
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10
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Anterior transtemporal endoscopic selective amygdalohippocampectomy: a virtual and cadaveric feasibility study. Acta Neurochir (Wien) 2022; 164:2841-2849. [PMID: 35809147 DOI: 10.1007/s00701-022-05295-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 06/20/2022] [Indexed: 01/31/2023]
Abstract
PURPOSE Selective amygdalohippocampectomy (SelAH) is one of the most common surgical treatments for mesial temporal sclerosis. Microsurgical approaches are associated with the risk of cognitive and visual deficits due to damage to the cortex and white matter (WM) pathways. Our objective is to test the feasibility of an endoscopic approach through the anterior middle temporal gyrus (aMTG) to perform a SelAH. METHODS Virtual simulation with MRI scans of ten patients (20 hemispheres) was used to identify the endoscopic trajectory through the aMTG. A cadaveric study was performed on 22 specimens using a temporal craniotomy. The anterior part of the temporal horn was accessed using a tubular retractor through the aMTG after performing a 1.5 cm corticectomy at 1.5 cm posterior to the temporal pole. Then, an endoscope was introduced. SeIAH was performed in each specimen. The specimens underwent neuronavigation-assisted endoscopic SeIAH to confirm our surgical trajectory. WM dissection using Klingler's technique was performed on five specimens to assess WM integrity. RESULTS This approach allowed the identification of collateral eminence, lateral ventricular sulcus, choroid plexus, inferior choroidal point, amygdala, hippocampus, and fimbria. SelAH was successfully performed on all specimens, and CT neuronavigation confirmed the planned trajectory. WM dissection confirmed the integrity of language pathways and optic radiations. CONCLUSIONS Endoscopic SelAH through the aMTG can be successfully performed with a corticectomy of 15 mm, presenting a reduced risk of vascular injury and damage to WM pathways. This could potentially help to reduce cognitive and visual deficits associated with SelAH.
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11
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Bullock DN, Hayday EA, Grier MD, Tang W, Pestilli F, Heilbronner SR. A taxonomy of the brain's white matter: twenty-one major tracts for the 21st century. Cereb Cortex 2022; 32:4524-4548. [PMID: 35169827 PMCID: PMC9574243 DOI: 10.1093/cercor/bhab500] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 01/26/2023] Open
Abstract
The functional and computational properties of brain areas are determined, in large part, by their connectivity profiles. Advances in neuroimaging and network neuroscience allow us to characterize the human brain noninvasively, but a comprehensive understanding of the human brain demands an account of the anatomy of brain connections. Long-range anatomical connections are instantiated by white matter, which itself is organized into tracts. These tracts are often disrupted by central nervous system disorders, and they can be targeted by neuromodulatory interventions, such as deep brain stimulation. Here, we characterized the connections, morphology, traversal, and functions of the major white matter tracts in the brain. There are major discrepancies across different accounts of white matter tract anatomy, hindering our attempts to accurately map the connectivity of the human brain. However, we are often able to clarify the source(s) of these discrepancies through careful consideration of both histological tract-tracing and diffusion-weighted tractography studies. In combination, the advantages and disadvantages of each method permit novel insights into brain connectivity. Ultimately, our synthesis provides an essential reference for neuroscientists and clinicians interested in brain connectivity and anatomy, allowing for the study of the association of white matter's properties with behavior, development, and disorders.
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Affiliation(s)
- Daniel N Bullock
- Department of Psychological and Brain Sciences, Program in Neuroscience, Indiana University Bloomington, Bloomington, IN 47405, USA
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
| | - Elena A Hayday
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
| | - Mark D Grier
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
| | - Wei Tang
- Department of Psychological and Brain Sciences, Program in Neuroscience, Indiana University Bloomington, Bloomington, IN 47405, USA
- Department of Computer Science, Indiana University Bloomington, Bloomington, IN 47408, USA
| | - Franco Pestilli
- Department of Psychology, The University of Texas at Austin, Austin, TX 78712, USA
| | - Sarah R Heilbronner
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
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12
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Boissonneau S, Lemaître AL, Herbet G, Ng S, Duffau H, Moritz-Gasser S. Evidence for a critical role of the left inferior parietal lobule and underlying white matter connectivity in proficient text reading. J Neurosurg 2022; 138:1433-1442. [PMID: 36057115 DOI: 10.3171/2022.7.jns22236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 07/15/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Reading proficiency is an important skill for personal and socio-professional daily life. Neurocognitive models underlie a dual-route organization for word reading, in which information is processed by both a dorsal phonological "assembled phonology route" and a ventral lexical-semantic "addressed phonology route." Because proficient reading should not be reduced to the ability to read words one after another, the current study was designed to shed light on the neural bases specifically underpinning text reading and the relative contributions of each route to this skill. METHODS Twenty-two patients with left-sided, diffuse, low-grade glioma who underwent operations while awake were included. They were divided into 3 groups on the basis of tumor location: the inferior parietal lobule (IPL) group (n = 6), inferior temporal gyrus (Tinf) group (n = 6), and fronto-insular (control) group (n = 10). Spoken language and reading abilities were tested in all patients the day before surgery, during surgery, and 3 months after surgery, and cognitive functioning was evaluated before and 3 months after surgery. Text-reading scores obtained before and 3 months after surgery were compared within each group and between groups, correlations between reading scores and both spoken language and cognitive scores were calculated, postoperative cortical-subcortical resection location was estimated, and multiple regression analysis was conducted to examine the relationship between reading proficiency and lesion location. RESULTS The results indicated that only the patients in the IPL group showed a significant decrease in text-reading scores between periods, which was not associated with lower scores in naming or verbal fluency; patients in the Tinf group showed a slight nonsignificant decrease in text reading between periods, which was associated with a clear decrease in naming and semantic verbal fluency; and patients in the control group showed no differences between preoperative and postoperative reading and spoken language scores. The results of the analysis of these behavioral results and anatomical data (resection cavities and white matter damage) suggest critical roles for the left inferior parietal lobule and underlying white matter connectivity, especially the posterior segment of the arcuate fasciculus, in proficient text reading. CONCLUSIONS Text-reading proficiency may depend on not only the integrity of both processing routes but also their capacity for interaction, with critical roles for the left inferior parietal lobule and posterior arcuate fasciculus. These findings have fundamental as well as clinical implications.
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Affiliation(s)
- Sébastien Boissonneau
- 1Department of Neurosurgery, APHM, CHU Timone, Marseille, France.,2Inserm, INS, Institute of Neurosciences of Systems, Aix Marseille University, Marseille, France
| | - Anne-Laure Lemaître
- 3Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France.,4National Institute for Health and Medical Research (INSERM), U1191, Team "Plasticity of Central Nervous System, Stem Cells and Glial Tumors," Institute of Functional Genomics, University of Montpellier, France; and
| | - Guillaume Herbet
- 3Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France.,4National Institute for Health and Medical Research (INSERM), U1191, Team "Plasticity of Central Nervous System, Stem Cells and Glial Tumors," Institute of Functional Genomics, University of Montpellier, France; and.,5Department of Speech-Language Therapy, Faculty of Medicine, University of Montpellier, France
| | - Sam Ng
- 3Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France.,4National Institute for Health and Medical Research (INSERM), U1191, Team "Plasticity of Central Nervous System, Stem Cells and Glial Tumors," Institute of Functional Genomics, University of Montpellier, France; and
| | - Hugues Duffau
- 3Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France.,4National Institute for Health and Medical Research (INSERM), U1191, Team "Plasticity of Central Nervous System, Stem Cells and Glial Tumors," Institute of Functional Genomics, University of Montpellier, France; and.,5Department of Speech-Language Therapy, Faculty of Medicine, University of Montpellier, France
| | - Sylvie Moritz-Gasser
- 3Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France.,4National Institute for Health and Medical Research (INSERM), U1191, Team "Plasticity of Central Nervous System, Stem Cells and Glial Tumors," Institute of Functional Genomics, University of Montpellier, France; and.,5Department of Speech-Language Therapy, Faculty of Medicine, University of Montpellier, France
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13
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Mahdy Ali K, Avesani P. The vertical superior longitudinal fascicle and the vertical occipital fascicle. J Neurosurg Sci 2022; 65:581-589. [PMID: 35128919 DOI: 10.23736/s0390-5616.21.05368-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Association fibers of the human brain have long been considered to exclusively follow an anterior-posterior direction. Using magnetic resonance imaging techniques that allow in-vivo fiber dissection, vertically oriented association fibers have been rediscovered or newly described. Aside from the frontal aslant tract (FAT) in the frontal lobe, the vertical occipital fascicle (VOF) and the vertical portion of the superior longitudinal fascicle system (vSLF) have been studied in recent years. The aim of this review was to give an overview on the current knowledge regarding these two fiber tracts. A review of the available literature in the Medline database was conducted to gather all available publications dealing with either the VOF or the vSLF. One thousand two hundred seventy-three articles were obtained from the literature search of which a total of 71 articles met the final inclusion criteria of this review. We describe the history of the discovery of the respective fiber tract, its anatomical course and its boundaries integrating blunt fiber dissection studies and functional MRI/tractography studies. We discuss the functional properties of the respective fiber tract and its relevance in neurosurgery. The VOF is a fiber tract that has been discovered in the late XIX century and long been forgotten before being rediscovered in the 1970's. It lies lateral to the fibers of the sagittal stratum and mainly connects the superior and inferior occipital lobe. It plays a major role in reading and visual word and language comprehension and is said to be the main link between dorsal and ventral visual streams. The vSLF has many synonyms and is part of the superior longitudinal fascicle system. Recent studies were able to provide more insight into this set of fiber tracts showing distinct connections running from the superior and inferior parietal lobule to the posterior part of the temporal lobe. Its functional role is still not completely cleared. It is said to play a role in visual and auditory semantic language comprehension. It lies directly lateral to the arcuate fascicle. The VOF and the vSLF are vertically oriented fiber tracts connecting the temporo-parieto-occipital region and play a major role in the communication of dorsal and ventral visual streams (VOF), reading (VOF, vSLF) and visual and auditory semantic language comprehension (vSLF). They can consistently be identified using ex vivo blunt dissection techniques and in-vivo fiber tractography. Because of their localization and orientation these two fiber tracts can be combined to a fiber bundle system called posterior transverse system (PTS).
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Affiliation(s)
- Kariem Mahdy Ali
- Department of Neurosurgery, Medical University of Graz, Graz, Austria -
| | - Paolo Avesani
- Center for Information Technology, Fondazione Bruno Kessler (FBK), Trento, Italy
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14
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Aykan S, Puglia MH, Kalaycıoğlu C, Pelphrey KA, Tuncalı T, Nalçacı E. Right Anterior Theta Hypersynchrony as a Quantitative Measure Associated with Autistic Traits and K-Cl Cotransporter KCC2 Polymorphism. J Autism Dev Disord 2022; 52:61-72. [PMID: 33635423 DOI: 10.1007/s10803-021-04924-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2021] [Indexed: 10/22/2022]
Abstract
Our aim was to use theta coherence as a quantitative trait to investigate the relation of the polymorphisms in NKCC1 (rs3087889) and KCC2 (rs9074) channel protein genes to autistic traits (AQ) in neurotypicals. Coherence values for candidate connection regions were calculated from eyes-closed resting EEGs in two independent groups. Hypersynchrony within the right anterior region was related to AQ in both groups (p < 0.05), and variability in this hypersynchrony was related to the rs9074 polymorphism in the total group (p < 0.05). In conclusion, theta hypersynchrony within the right anterior region during eyes-closed rest can be considered a quantitative measure for autistic traits. Replicating our findings in two independent populations with different backgrounds strengthens the validity of the current study.
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Affiliation(s)
- Simge Aykan
- Department of Physiology, Ankara University School of Medicine, Ankara, Turkey.
| | - Meghan H Puglia
- Department of Neurology, University of Virginia, Charlottesville, VA, USA
- Department of Psychology, University of Virginia, Charlottesville, VA, USA
| | - Canan Kalaycıoğlu
- Department of Physiology, Ankara University School of Medicine, Ankara, Turkey
| | - Kevin A Pelphrey
- Department of Neurology, University of Virginia, Charlottesville, VA, USA
| | - Timur Tuncalı
- Department of Medical Genetics, Ankara University School of Medicine, Ankara, Turkey
| | - Erhan Nalçacı
- Department of Physiology, Ankara University School of Medicine, Ankara, Turkey
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15
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Liakos F, Komaitis S, Drosos E, Neromyliotis E, Skandalakis GP, Gerogiannis AI, Kalyvas AV, Troupis T, Stranjalis G, Koutsarnakis C. The Topography of the Frontal Terminations of the Uncinate Fasciculus Revisited Through Focused Fiber Dissections: Shedding Light on a Current Controversy and Introducing the Insular Apex as a Key Anatomoclinical Area. World Neurosurg 2021; 152:e625-e634. [PMID: 34144169 DOI: 10.1016/j.wneu.2021.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/03/2021] [Accepted: 06/04/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Recent studies advocate a connectivity pattern wider than previously believed of the uncinate fasciculus that extends to the ventrolateral and dorsolateral prefrontal cortices. These new percepts on the connectivity of the tract suggest a more expansive role for the uncinate fasciculus. Our aim was to shed light on this controversy through fiber dissections. METHODS Twenty normal adult human formalin-fixed cerebral hemispheres were used. Focused dissections on the insular, orbitofrontal, ventromedial, ventrolateral, and dorsolateral prefrontal areas were performed to record the topography of the frontal terminations of the uncinate fasciculus. RESULTS Three discrete fiber layers were consistently disclosed: the first layer was recorded to terminate at the posterior orbital gyrus and pars orbitalis, the second layer at the posterior two thirds of the gyrus rectus, and the last layer at the posterior one third of the paraolfactory gyrus. The insular apex was documented as a crucial landmark regarding the topographic differentiation of the uncinate and occipitofrontal fasciculi (i.e., fibers that travel ventrally belong to the uncinate fasciculus whereas those traveling dorsally are occipitofrontal fibers). CONCLUSIONS The frontal terminations of the uncinate fasciculus were consistently documented to project to the posterior orbitofrontal area. The area of the insular apex is introduced for the first time as a crucial surface landmark to effectively distinguish the stems of the uncinate and occipitofrontal fasciculi. This finding could refine the spatial resolution of awake subcortical mapping, especially for insular lesions, and improve the accuracy of in vivo diffusion tensor imaging protocols.
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Affiliation(s)
- Faidon Liakos
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Anatomy, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Spyridon Komaitis
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Neurosurgery, Evangelismos Hospital, National and Kapodistrian University of Athens, Athens, Greece; Department of Anatomy, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Evangelos Drosos
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Neurosurgery, Evangelismos Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Eleftherios Neromyliotis
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Neurosurgery, Evangelismos Hospital, National and Kapodistrian University of Athens, Athens, Greece; Hellenic Center for Neurosurgical Research, "Petros Kokkalis", Athens, Greece
| | | | | | - Aristotelis V Kalyvas
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Neurosurgery, Evangelismos Hospital, National and Kapodistrian University of Athens, Athens, Greece; Department of Anatomy, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Theodore Troupis
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Anatomy, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - George Stranjalis
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Neurosurgery, Evangelismos Hospital, National and Kapodistrian University of Athens, Athens, Greece; Hellenic Center for Neurosurgical Research, "Petros Kokkalis", Athens, Greece
| | - Christos Koutsarnakis
- Athens Microneurosurgery Laboratory, Evangelismos Hospital, Athens, Greece; Department of Neurosurgery, Evangelismos Hospital, National and Kapodistrian University of Athens, Athens, Greece; Edinburgh Microneurosurgery Education Laboratory, Department of Clinical Neurosciences, Edinburgh, United Kingdom; Department of Anatomy, Medical School, National and Kapodistrian University of Athens, Athens, Greece; Hellenic Center for Neurosurgical Research, "Petros Kokkalis", Athens, Greece.
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16
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Language reorganization after resection of low-grade gliomas: an fMRI task based connectivity study. Brain Imaging Behav 2021; 14:1779-1791. [PMID: 31111301 DOI: 10.1007/s11682-019-00114-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Few studies addressed the evolution of brain activity before and after brain tumor resection. Using a fMRI naming task, we evaluated possible underlying plasticity phenomena. Thirty-two patients with left low-grade gliomas (16 women; age = 38.6 ± 8.31 years) and 19 healthy controls (7 women; age = 42.4 ± 12.1) were included in the study. An overt picture-naming task (DO80) was performed pre and post (3 months) surgery, as well as within the MRI in a covert manner. Exams included an injected 3DT1, a T2FLAIR, a DTI and a GE-EPI (task) sequence. Activations maps were compared with picture naming score, FA and MD maps were estimated, a VLSM analysis was performed on tumor masks, and disconnectome maps were reconstructed. Pre-surgery, the left parahippocampal gyrus (LPH) was inversely associated with task performance. Increased pre-post surgery left lingual gyrus (LLG) activity was found related to decreased picture naming performance. The evolution of left lingual gyrus (LLG) activity was negatively associated with the evolution of picture naming performance. In controls, the LPH was functionally connected to the right precentral gyrus (RPCG) and slightly to the LLG. This was not clearly retrieved in the patient group. Preoperatively, the LLG was connected to the left planum temporale and to the right lingual gyrus. The same result was found for controls. Postoperatively, the LLG was only connected to the RPCG. No association was found between evolution of FA/MD and evolution of picture naming performance. There is not one unique pattern of pre- and postoperative plasticity concerning picture-naming performance in DLGG patients.
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17
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Hu S, Xu C, Dong T, Wu H, Wang Y, Wang A, Kan H, Li C. Structural and Functional Changes Are Related to Cognitive Status in Wilson's Disease. Front Hum Neurosci 2021; 15:610947. [PMID: 33716691 PMCID: PMC7947794 DOI: 10.3389/fnhum.2021.610947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 01/20/2021] [Indexed: 11/13/2022] Open
Abstract
Patients with Wilson’s disease (WD) suffer from prospective memory (PM) impairment, and some of patients develop cognitive impairment. However, very little is known about how brain structure and function changes effect PM in WD. Here, we employed multimodal neuroimaging data acquired from 22 WD patients and 26 healthy controls (HC) who underwent three-dimensional T1-weighted, diffusion tensor imaging (DTI), and resting state functional magnetic resonance imaging (RS-fMRI). We investigated gray matter (GM) volumes with voxel-based morphometry, DTI metrics using the fiber tractography method, and RS-fMRI using the seed-based functional connectivity method. Compared with HC, WD patients showed GM volume reductions in the basal ganglia (BG) and occipital fusiform gyrus, as well as volume increase in the visual association cortex. Moreover, whiter matter (WM) tracks of WD were widely impaired in association and limbic fibers. WM tracks in association fibers are significant related to PM in WD patients. Relative to HC, WD patients showed that the visual association cortex functionally connects to the thalamus and hippocampus, which is associated with global cognitive function in patients with WD. Together, these findings suggested that PM impairment in WD may be modulated by aberrant WM in association fibers, and that GM volume changes in the association cortex has no direct effect on cognitive status, but indirectly affect global cognitive function by its aberrant functional connectivity (FC) in patients with WD. Our findings may provide a new window to further study how WD develops into cognitive impairment, and deepen our understanding of the cognitive status and neuropathology of WD.
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Affiliation(s)
- Sheng Hu
- Center for Biomedical Engineering, University of Science and Technology of China, Hefei, China.,School of Medical Information Engineering, Anhui University of Chinese Medicine, Hefei, China
| | - Chunsheng Xu
- Center for Biomedical Engineering, University of Science and Technology of China, Hefei, China.,Medical Imaging Center, First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, China
| | - Ting Dong
- Medical Imaging Center, First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, China
| | - Hongli Wu
- School of Medical Information Engineering, Anhui University of Chinese Medicine, Hefei, China
| | - Yi Wang
- School of Medical Information Engineering, Anhui University of Chinese Medicine, Hefei, China
| | - Anqin Wang
- Medical Imaging Center, First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, China
| | - Hongxing Kan
- School of Medical Information Engineering, Anhui University of Chinese Medicine, Hefei, China
| | - Chuanfu Li
- Medical Imaging Center, First Affiliated Hospital of Anhui University of Chinese Medicine, Hefei, China
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18
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Lin YH, Young IM, Conner AK, Glenn CA, Chakraborty AR, Nix CE, Bai MY, Dhanaraj V, Fonseka RD, Hormovas J, Tanglay O, Briggs RG, Sughrue ME. Anatomy and White Matter Connections of the Inferior Temporal Gyrus. World Neurosurg 2020; 143:e656-e666. [DOI: 10.1016/j.wneu.2020.08.058] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 08/06/2020] [Accepted: 08/08/2020] [Indexed: 12/27/2022]
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19
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Komaitis S, Kalyvas AV, Skandalakis GP, Drosos E, Lani E, Liouta E, Liakos F, Kalamatianos T, Piagkou M, Emelifeonwu JA, Stranjalis G, Koutsarnakis C. The frontal longitudinal system as revealed through the fiber microdissection technique: structural evidence underpinning the direct connectivity of the prefrontal-premotor circuitry. J Neurosurg 2020; 133:1503-1515. [PMID: 31585424 DOI: 10.3171/2019.6.jns191224] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 06/13/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The purpose of this study was to investigate the morphology, connectivity, and correlative anatomy of the longitudinal group of fibers residing in the frontal area, which resemble the anterior extension of the superior longitudinal fasciculus (SLF) and were previously described as the frontal longitudinal system (FLS). METHODS Fifteen normal adult formalin-fixed cerebral hemispheres collected from cadavers were studied using the Klingler microdissection technique. Lateral to medial dissections were performed in a stepwise fashion starting from the frontal area and extending to the temporoparietal regions. RESULTS The FLS was consistently identified as a fiber pathway residing just under the superficial U-fibers of the middle frontal gyrus or middle frontal sulcus (when present) and extending as far as the frontal pole. The authors were able to record two different configurations: one consisting of two distinct, parallel, longitudinal fiber chains (13% of cases), and the other consisting of a single stem of fibers (87% of cases). The fiber chains' cortical terminations in the frontal and prefrontal area were also traced. More specifically, the FLS was always recorded to terminate in Brodmann areas 6, 46, 45, and 10 (premotor cortex, dorsolateral prefrontal cortex, pars triangularis, and frontal pole, respectively), whereas terminations in Brodmann areas 4 (primary motor cortex), 47 (pars orbitalis), and 9 were also encountered in some specimens. In relation to the SLF system, the FLS represented its anterior continuation in the majority of the hemispheres, whereas in a few cases it was recorded as a completely distinct tract. Interestingly, the FLS comprised shorter fibers that were recorded to interconnect exclusively frontal areas, thus exhibiting different fiber architecture when compared to the long fibers forming the SLF. CONCLUSIONS The current study provides consistent, focused, and robust evidence on the morphology, architecture, and correlative anatomy of the FLS. This fiber system participates in the axonal connectivity of the prefrontal-premotor cortices and allegedly subserves cognitive-motor functions. Based in the SLF hypersegmentation concept that has been advocated by previous authors, the FLS should be approached as a distinct frontal segment within the superior longitudinal system.
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Affiliation(s)
- Spyridon Komaitis
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
- 2Department of Neurosurgery, National and Kapodistrian University of Athens
- 3Department of Anatomy, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Aristotelis V Kalyvas
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
- 2Department of Neurosurgery, National and Kapodistrian University of Athens
- 3Department of Anatomy, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Georgios P Skandalakis
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
- 3Department of Anatomy, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Evangelos Drosos
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
- 2Department of Neurosurgery, National and Kapodistrian University of Athens
| | - Evgenia Lani
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
- 3Department of Anatomy, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - Evangelia Liouta
- 6Hellenic Center for Neurosurgical Research, "Petros Kokkalis," Athens, Greece
| | - Faidon Liakos
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
| | | | - Maria Piagkou
- 3Department of Anatomy, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
| | - John A Emelifeonwu
- 4Department of Clinical Neurosciences, Western General Hospital, Edinburgh
- 5Department of Clinical Neurosciences, Edinburgh Microneurosurgery Education Laboratory, Edinburgh, UK; and
| | - George Stranjalis
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
- 2Department of Neurosurgery, National and Kapodistrian University of Athens
- 6Hellenic Center for Neurosurgical Research, "Petros Kokkalis," Athens, Greece
| | - Christos Koutsarnakis
- 1Athens Microneurosurgery Laboratory, National and Kapodistrian University of Athens School of Medicine, Athens
- 2Department of Neurosurgery, National and Kapodistrian University of Athens
- 3Department of Anatomy, National and Kapodistrian University of Athens School of Medicine, Athens, Greece
- 5Department of Clinical Neurosciences, Edinburgh Microneurosurgery Education Laboratory, Edinburgh, UK; and
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20
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de la Peña MJ, Gil-Robles S, de Vega VM, Aracil C, Acevedo A, Rodríguez MR. A Practical Approach to Imaging of the Supplementary Motor Area and Its Subcortical Connections. Curr Neurol Neurosci Rep 2020; 20:50. [PMID: 32930895 DOI: 10.1007/s11910-020-01070-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE OF REVIEW First, an anatomical and functional review of these cortical areas and subcortical connections with T-fMRI and tractography techniques; second, to demonstrate the value of this approach in neurosurgical planning in a series of patients with tumors close to the SMA. RECENT FINDINGS Implications in language and cognitive networks with a clear hemispheric lateralization of these SMA/pre-SMA. The recommendation of the use of the advanced neuroimaging studies for surgical planning and preservation of these areas. The SMA/pre-SMA and their subcortical connections are functional areas to be taken into consideration in neurosurgical planning. These areas would be involved in the control/inhibition of movement, in verbal expression and fluency and in tasks of cognitive control capacity. Its preservation is key to the patient's postsurgical cognitive and functional evolution.
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Affiliation(s)
- Mar Jiménez de la Peña
- Department of Radiology, Hospital Universitario QuironSalud Madrid, C/ Diego de Velázquez 1, Pozuelo de Alarcón, 28223, Madrid, Spain.
| | - Santiago Gil-Robles
- Department of Neurosurgery, Hospital Universitario QuironSalud Madrid, Pozuelo de Alarcón, Madrid, Spain
| | - Vicente Martínez de Vega
- Department of Radiology, Hospital Universitario QuironSalud Madrid, C/ Diego de Velázquez 1, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - Cristina Aracil
- Department of Neurosurgery, Hospital Universitario QuironSalud Madrid, Pozuelo de Alarcón, Madrid, Spain
| | - Agustín Acevedo
- Department of Pathology, Hospital Universitario QuironSalud Madrid, Pozuelo de Alarcón, Madrid, Spain
| | - Manuel Recio Rodríguez
- Department of Radiology, Hospital Universitario QuironSalud Madrid, C/ Diego de Velázquez 1, Pozuelo de Alarcón, 28223, Madrid, Spain
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Guerrero M, Veuthey C, Del Sol M, Ottone NE. Dissection of white matter association fasciculi in bovine (Bos taurus), pig (Sus scrofa domesticus) and rabbit (Oryctolagus cuniculus) brains. Anat Histol Embryol 2020; 49:550-562. [PMID: 32281688 DOI: 10.1111/ahe.12561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/09/2020] [Accepted: 03/21/2020] [Indexed: 11/29/2022]
Abstract
The cerebral fasciculi (association, commissural and projection) pass through the cerebral white matter in organized groups connecting regions, hemispheres, gyri, areas and brain lobes to each other. The study can be done in vivo through diffusion tensor imaging (DTI) but presenting some technical problems. The post-mortem study by dissection allows to have a clearer view of its location, path and connections. In this work, we dissect, identify and compare the fasciculi of association of the white matter of the dorsolateral face of bovine hemispheres (Bos taurus), pig hemispheres (Sus scrofa domesticus) and rabbit hemispheres (Oryctolagus cuniculus), applying the Klingler´s technique. In 30 cerebral hemispheres (10 of each species, five right and five left), we applied the Klingler technique to identify and isolate the occipitofrontal fasciculus, uncinate fasciculus, inferior longitudinal fasciculus and superior longitudinal fasciculus; we established its location by fixing landmarks, and determined the difference in its length and width between the right and left hemispheres as well as between species using the statistical tests of t-student and one-way ANOVA. We identify the gyri, sulci and fasciculi of the dorsolateral surface of the cerebral hemispheres of the three species. We found statistically significant differences in several fasciculi between species principally in the occipitofrontal fasciculus. The preparation of the brains through the modified Klingler technique allowed a successful identification of the fascicules of association of the dorsolateral face of the cerebral hemispheres and the empowerment of these animal models for future research work in this field.
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Affiliation(s)
- Marco Guerrero
- Doctoral Program in Morphological Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Chair of Anatomy, Faculty of Medical Sciences, Universidad Central del Ecuador, Quito, Ecuador
| | - Carlos Veuthey
- Laboratory of Plastination and Anatomical Techniques, Research Centre in Dental Sciences (CICO), Dental School, Universidad de La Frontera, Temuco, Chile.,Center of Excellence in Morphological and Surgical Studies (CEMyQ), Universidad de La Frontera, Temuco, Chile
| | - Mariano Del Sol
- Doctoral Program in Morphological Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Center of Excellence in Morphological and Surgical Studies (CEMyQ), Universidad de La Frontera, Temuco, Chile
| | - Nicolas E Ottone
- Doctoral Program in Morphological Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco, Chile.,Laboratory of Plastination and Anatomical Techniques, Research Centre in Dental Sciences (CICO), Dental School, Universidad de La Frontera, Temuco, Chile.,Center of Excellence in Morphological and Surgical Studies (CEMyQ), Universidad de La Frontera, Temuco, Chile
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22
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Komaitis S, Skandalakis GP, Kalyvas AV, Drosos E, Lani E, Emelifeonwu J, Liakos F, Piagkou M, Kalamatianos T, Stranjalis G, Koutsarnakis C. Dorsal component of the superior longitudinal fasciculus revisited: novel insights from a focused fiber dissection study. J Neurosurg 2020; 132:1265-1278. [PMID: 30835690 DOI: 10.3171/2018.11.jns182908] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 11/15/2018] [Indexed: 01/12/2023]
Abstract
OBJECTIVE The aim of this study was to investigate the anatomical consistency, morphology, axonal connectivity, and correlative topography of the dorsal component of the superior longitudinal fasciculus (SLF-I) since the current literature is limited and ambiguous. METHODS Fifteen normal, adult, formalin-fixed cerebral hemispheres were studied through a medial to lateral fiber microdissection technique. In 5 specimens, the authors performed stepwise focused dissections of the lateral cerebral aspect to delineate the correlative anatomy between the SLF-I and the other two SLF subcomponents, namely the SLF-II and SLF-III. RESULTS The SLF-I was readily identified as a distinct fiber tract running within the cingulate or paracingulate gyrus and connecting the anterior cingulate cortex, the medial aspect of the superior frontal gyrus, the pre-supplementary motor area (pre-SMA), the SMA proper, the paracentral lobule, and the precuneus. With regard to the morphology of the SLF-I, two discrete segments were consistently recorded: an anterior and a posterior segment. A clear cleavage plane could be developed between the SLF-I and the cingulum, thus proving their structural integrity. Interestingly, no anatomical connection was revealed between the SLF-I and the SLF-II/SLF-III complex. CONCLUSIONS Study results provide novel and robust anatomical evidence on the topography, morphology, and subcortical architecture of the SLF-I. This fiber tract was consistently recorded as a distinct anatomical entity of the medial cerebral aspect, participating in the axonal connectivity of high-order paralimbic areas.
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Affiliation(s)
- Spyridon Komaitis
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
- Departments of2Neurosurgery and
- 3Anatomy, National and Kapodistrian University of Athens, School of Medicine
| | - Georgios P Skandalakis
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
- 3Anatomy, National and Kapodistrian University of Athens, School of Medicine
| | - Aristotelis V Kalyvas
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
- Departments of2Neurosurgery and
- 3Anatomy, National and Kapodistrian University of Athens, School of Medicine
| | - Evangelos Drosos
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
- Departments of2Neurosurgery and
- 3Anatomy, National and Kapodistrian University of Athens, School of Medicine
| | - Evgenia Lani
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
- 3Anatomy, National and Kapodistrian University of Athens, School of Medicine
| | - John Emelifeonwu
- 4Department of Clinical Neurosciences, Western General Hospital; and
- 5Edinburgh Microneurosurgery Education Laboratory, Department of Clinical Neurosciences, Edinburgh, United Kingdom
| | - Faidon Liakos
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
| | - Maria Piagkou
- 3Anatomy, National and Kapodistrian University of Athens, School of Medicine
| | | | - George Stranjalis
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
- Departments of2Neurosurgery and
- 6Hellenic Center for Neurosurgical Research, "Petros Kokkalis," Athens, Greece
| | - Christos Koutsarnakis
- 1Athens Microneurosurgery Laboratory, Evangelismos Hospital
- Departments of2Neurosurgery and
- 3Anatomy, National and Kapodistrian University of Athens, School of Medicine
- 5Edinburgh Microneurosurgery Education Laboratory, Department of Clinical Neurosciences, Edinburgh, United Kingdom
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23
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Asymmetry of the frontal aslant tract is associated with lexical decision. Brain Struct Funct 2020; 225:1009-1017. [PMID: 32157449 DOI: 10.1007/s00429-020-02054-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 02/27/2020] [Indexed: 10/24/2022]
Abstract
The frontal aslant tract (FAT) is a recently documented white matter tract that connects the inferior and superior frontal gyri with a tendency to be more pronounced in the left hemisphere. This tract has been found to play a role in language functions, particularly verbal fluency. However, it is not entirely clear to what extent FAT asymmetry is related to performance benefits in language-related tasks. In the present study, we aimed to fill this gap by examining the correlations between asymmetric micro- and macro-structural properties of the FAT and performance on verbal fluency and lexical decision tasks. The results showed no correlation between the FAT and verbal fluency; however, lexical decision was correlated with FAT laterality. Specifically, greater left lateralization in both micro- and macro-structural properties was related to faster lexical decision response times. The results were not due merely to motor or decision-making processes, as responses in a simple discrimination control task showed no correlation with laterality. These data are the first to suggest a role for the FAT in mediating processes underlying lexical decision.
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24
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Del Tufo SN, Earle FS, Cutting LE. The impact of expressive language development and the left inferior longitudinal fasciculus on listening and reading comprehension. J Neurodev Disord 2019; 11:37. [PMID: 31838999 PMCID: PMC6912995 DOI: 10.1186/s11689-019-9296-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 11/11/2019] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND During the first 3-years of life, as the brain undergoes dramatic growth, children begin to develop speech and language. Hallmarks of this progression are seen when children reach developmental milestones, forming the foundation of language. Expressive language milestones, such as the production of a child's first word, are delayed in 5-8% of children. While for some children delays in reaching these milestones are harbingers of developmental disorders, for others expressive language delays appear to resolve. Regardless of whether or not early language skills appear resolved, difficulty with later comprehension is a likely outcome. Whether this heightened risk for poor comprehension differs based on text features, individual characteristics, or receipt of intervention remains unknown. Moreover, this relationship between expressive language development and comprehension is not yet linked to neurobiology, though the inferior longitudinal fasciculus (ILF) is a potential neurobiological correlate. Therefore, we investigated the impact of, and interactions between, expressive language development, early intervention, and the ILF on comprehension. METHODS Longitudinal recurrent survival analyses predicted the risk of answering a comprehension question incorrectly. Predictors of comprehension included expressive language development, passage features, participant characteristics, fractional anisotropy, receipt of early intervention, and later diagnosis of speech or language disorders. RESULTS Children with later expressive language milestones had poorer comprehension. When comprehension text features were examined, children with later milestones had poorer listening and reading comprehension, and poorer narrative and expository comprehension. The left ILF acted as a neurodevelopmental correlate, one that moderated the relationship between expressive language milestones and comprehension. Specifically, the left ILF exacerbated the relationship for those who did not receive early intervention and buffered the relationship for those who received intervention services. Early intervention decreased the risk of poor comprehension by 39% for children later diagnosed with a speech or language disorder. CONCLUSIONS Early intervention should be provided for children with delayed expressive language milestones, particularly those who are at risk for speech or language disorders. The ILF plays a critical role in the relationship between expressive language development and comprehension, which may be that of a protective factor for children with the most severe early issues with speech and language.
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Affiliation(s)
- Stephanie N Del Tufo
- Peabody College of Education and Human Development, Vanderbilt University, 416C One Magnolia Circle, Box 228, Nashville, TN, 37203, USA.,Vanderbilt Brain Institute, Vanderbilt University School of Medicine, 6133 Medical Research Building III, 465 21st Avenue South, Nashville, TN, 37232, USA.,Vanderbilt Kennedy Center, Vanderbilt University, 110 Magnolia Circle, Nashville, TN, 37203, USA.,College of Education and Human Development, University of Delaware, 106 Alison Hall West, Newark, DE, 19716, USA
| | - F Sayako Earle
- Communication Sciences and Disorders, University of Delaware, 100 Discovery Boulevard, Newark, DE, 19713, USA
| | - Laurie E Cutting
- Peabody College of Education and Human Development, Vanderbilt University, 416C One Magnolia Circle, Box 228, Nashville, TN, 37203, USA. .,Vanderbilt Brain Institute, Vanderbilt University School of Medicine, 6133 Medical Research Building III, 465 21st Avenue South, Nashville, TN, 37232, USA. .,Vanderbilt Kennedy Center, Vanderbilt University, 110 Magnolia Circle, Nashville, TN, 37203, USA.
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25
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Jennings JE, Kassam AB, Fukui MB, Monroy-Sosa A, Chakravarthi S, Kojis N, Rovin RA. The Surgical White Matter Chassis: A Practical 3-Dimensional Atlas for Planning Subcortical Surgical Trajectories. Oper Neurosurg (Hagerstown) 2019; 14:469-482. [PMID: 28961936 DOI: 10.1093/ons/opx177] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 07/13/2017] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The imperative role of white matter preservation in improving surgical functional outcomes is now recognized. Understanding the fundamental white matter framework is essential for translating the anatomic and functional literature into practical strategies for surgical planning and neuronavigation. OBJECTIVE To present a 3-dimensional (3-D) atlas of the structural and functional scaffolding of human white matter-ie, a "Surgical White Matter Chassis (SWMC)"-that can be used as an organizational tool in designing precise and individualized trajectory-based neurosurgical corridors. METHODS Preoperative diffusion tensor imaging magnetic resonance images were obtained prior to each of our last 100 awake subcortical resections, using a clinically available 3.0 Tesla system. Tractography was generated using a semiautomated deterministic global seeding algorithm. Tract data were conceptualized as a 3-D modular chassis based on the 3 major fiber types, organized along median and paramedian planes, with special attention to limbic and neocortical association tracts and their interconnections. RESULTS We discuss practical implementation of the SWMC concept, and highlight its use in planning select illustrative cases. Emphasis has been given to developing practical understanding of the arcuate fasciculus, uncinate fasciculus, and vertical rami of the superior longitudinal fasciculus, which are often-neglected fibers in surgical planning. CONCLUSION A working knowledge of white matter anatomy, as embodied in the SWMC, is of paramount importance to the planning of parafascicular surgical trajectories, and can serve as a basis for developing reliable safe corridors, or modules, toward the goal of "zero-footprint" transsulcal access to the subcortical space.
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Affiliation(s)
- Jonathan E Jennings
- Aurora Neuroscience Innovation Insti-tute, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
| | - Amin B Kassam
- Aurora Neuroscience Innovation Insti-tute, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
| | - Melanie B Fukui
- Aurora Neuroscience Innovation Insti-tute, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
| | - Alejandro Monroy-Sosa
- Aurora Neuroscience Innovation Insti-tute, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
| | - Srikant Chakravarthi
- Aurora Neuroscience Innovation Insti-tute, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
| | - Nathan Kojis
- Aurora Neuroscience Innovation Insti-tute, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
| | - Richard A Rovin
- Aurora Neuroscience Innovation Insti-tute, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
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Sali G, Briggs RG, Conner AK, Rahimi M, Baker CM, Burks JD, Glenn CA, Battiste JD, Sughrue ME. A Connectomic Atlas of the Human Cerebrum-Chapter 11: Tractographic Description of the Inferior Longitudinal Fasciculus. Oper Neurosurg (Hagerstown) 2019; 15:S423-S428. [PMID: 30260434 DOI: 10.1093/ons/opy265] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 09/18/2018] [Indexed: 11/13/2022] Open
Abstract
In this supplement, we seek to show a comprehensive anatomic atlas of the human cerebrum demonstrating all 180 distinct regions comprising the cerebral cortex. The location, functional connectivity, and structural connectivity of these regions are outlined, and where possible a discussion is included of the functional significance of these areas. In this chapter, we specifically address regions integrating to form the inferior longitudinal fasciculus.
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Affiliation(s)
- Goksel Sali
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Robert G Briggs
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Andrew K Conner
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Meherzad Rahimi
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Cordell M Baker
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Joshua D Burks
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Chad A Glenn
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - James D Battiste
- Department of Neurology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Michael E Sughrue
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.,Department of Neurosurgery, Prince of Wales Private Hospital, Sydney, Australia
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Briggs RG, Conner AK, Rahimi M, Sali G, Baker CM, Burks JD, Glenn CA, Battiste JD, Sughrue ME. A Connectomic Atlas of the Human Cerebrum-Chapter 14: Tractographic Description of the Frontal Aslant Tract. Oper Neurosurg (Hagerstown) 2019; 15:S444-S449. [PMID: 30260440 DOI: 10.1093/ons/opy268] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 09/18/2018] [Indexed: 01/21/2023] Open
Abstract
In this supplement, we show a comprehensive anatomic atlas of the human cerebrum demonstrating all 180 distinct regions comprising the cerebral cortex. The location, functional connectivity, and structural connectivity of these regions are outlined, and where possible a discussion is included of the functional significance of these areas. In this chapter, we specifically address the regions integrating to form the frontal aslant tract.
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Affiliation(s)
- Robert G Briggs
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Andrew K Conner
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Meherzad Rahimi
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Goksel Sali
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Cordell M Baker
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Joshua D Burks
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Chad A Glenn
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - James D Battiste
- Department of Neurology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Michael E Sughrue
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.,Department of Neurosurgery, Prince of Wales Private Hospital, Sydney, Australia
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Cocquyt EM, Lanckmans E, van Mierlo P, Duyck W, Szmalec A, Santens P, De Letter M. The white matter architecture underlying semantic processing: A systematic review. Neuropsychologia 2019; 136:107182. [PMID: 31568774 DOI: 10.1016/j.neuropsychologia.2019.107182] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 12/23/2022]
Abstract
From a holistic point of view, semantic processes are subserved by large-scale subcortico-cortical networks. The dynamic routing of information between grey matter structures depends on the integrity of subcortical white matter pathways. Nonetheless, controversy remains on which of these pathways support semantic processing. Therefore, a systematic review of the literature was performed with a focus on anatomo-functional correlations obtained from direct electrostimulation during awake tumor surgery, and conducted between diffusion tensor imaging metrics and behavioral semantic performance in healthy and aphasic individuals. The 43 included studies suggest that the left inferior fronto-occipital fasciculus contributes to the essential connectivity that allows semantic processing. However, it remains uncertain whether its contributive role is limited to the organization of semantic knowledge or extends to the level of semantic control. Moreover, the functionality of the left uncinate fasciculus, inferior longitudinal fasciculus and the posterior segment of the indirect arcuate fasciculus in semantic processing has to be confirmed by future research.
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Affiliation(s)
- E-M Cocquyt
- Department of Rehabilitation Sciences, Ghent University, Belgium; Research Group BrainComm, Ghent University, Belgium.
| | - E Lanckmans
- Department of Rehabilitation Sciences, Ghent University, Belgium; Research Group BrainComm, Ghent University, Belgium
| | - P van Mierlo
- Research Group BrainComm, Ghent University, Belgium; Department of Electronics and Information Systems, Medical Image and Signal Processing Group, Ghent University, Belgium
| | - W Duyck
- Faculty of Psychology and Educational Sciences, Department of Experimental Psychology, Ghent University, Belgium
| | - A Szmalec
- Faculty of Psychology and Educational Sciences, Department of Experimental Psychology, Ghent University, Belgium; Psychological Sciences Research Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - P Santens
- Research Group BrainComm, Ghent University, Belgium; Department of Neurology, Ghent University Hospital, Belgium
| | - M De Letter
- Department of Rehabilitation Sciences, Ghent University, Belgium; Research Group BrainComm, Ghent University, Belgium
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29
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Inferior Fronto-Occipital fascicle anatomy in brain tumor surgeries: From anatomy lab to surgical theater. J Clin Neurosci 2019; 68:290-294. [DOI: 10.1016/j.jocn.2019.07.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 07/06/2019] [Indexed: 11/23/2022]
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Lau R, Rodriguez Rubio R, Martino J, Sanmillán JL, Benet A, Tayebi Meybodi A, Gandhi S, Kournoutas I, Gabarrós A. Endoscopic Transanterior Middle Temporal Approach to the Atrium—An Anatomical Feasibility Study. World Neurosurg 2019; 128:e98-e106. [DOI: 10.1016/j.wneu.2019.04.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 11/27/2022]
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Associative white matter connecting the dorsal and ventral posterior human cortex. Brain Struct Funct 2019; 224:2631-2660. [DOI: 10.1007/s00429-019-01907-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 06/07/2019] [Indexed: 02/05/2023]
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Zhukov VY, Goryaynov SA, Buklina SB, Vologdina YO, Batalov AI, Ogurtsova AA, Kulikov AS, Kobyakov GL, Sitnikov AR, Chernyshov KA, Chelushkin DM, Zakharova NE, Potapov AA. [Intraoperative mapping of long association fibers in surgery of gliomas of the speech-dominant frontal lobe]. ZHURNAL VOPROSY NEĬROKHIRURGII IMENI N. N. BURDENKO 2019; 82:5-20. [PMID: 30412152 DOI: 10.17116/neiro2018820515] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Surgery of intracerebral tumors involving long association fibers is a challenge. In this study, we analyze the results of intraoperative mapping of the superior longitudinal, arcuate, and frontal aslant tracts in surgery of brain gliomas. PURPOSE The study purpose was to compare the results of intraoperative mapping and the postoperative speech function in patients with gliomas of the premotor area of the speech-dominant frontal lobe, which involved the superior longitudinal, arcuate, and frontal aslant tracts, who were operated on using awake craniotomy. MATERIAL AND METHODS Twelve patients with left frontal lobe gliomas were operated on: 11 patients were right-handed, and one patient was a left-hander retrained at an early age. Histological types of tumors were represented by Grade II diffuse astrocytomas (6 patients), Grade III anaplastic astrocytomas (1 patient), Grade IV glioblastoma (1 patient), Grade II oligodendroglioma (1 patient), and Grade III anaplastic oligodendrogliomas (3 patients). The mean age of patients was 45 (29-67) years; there were 6 males and 6 females. All patients underwent preoperative and postoperative MRI with reconstruction of the long association fibers and determination of the topographic anatomical relationships between the fibers and the tumor. Surgery was performed using the asleep-awake-asleep protocol with intraoperative awakening of patients. All patients underwent cortical and subcortical electrophysiological stimulation to control the localization of eloquent structures and to clarify the safe limits of resection. For intraoperative speech monitoring, a computerized naming test was used with naming of nouns or verbs, and automatic speech was evaluated (counting from 1 to 10, enumeration of months and days of the week), which was complemented by a talk with the patient. Speech disorders before, during, and after surgery were evaluated by a neuropsychologist. The mean current strength during direct electrical stimulation was 3 (1.9-6.5) mA. RESULTS The association fibers were intraoperatively identified in all patients (SLF/AF in 11 patients; FAT in one patient). In 4 patients, the cortical motor speech area was intraoperatively mapped; in three cases, tumor resection was accompanied by speech disturbances outside the stimulation. During direct electrical stimulation, speech disturbances developed in 7 of 12 cases. All patients underwent control MRI within the first 48-72 h: total resection (more than 90% of the tumor) was performed in 7 cases; subtotal resection was achieved in two patients; partial resection was performed in two cases. According to postoperative MR tractography, the resected tumor bed was adjacent to the SLF/AF complex in 7 cases, located near the SLF/AF complex in three cases, and adjacent to the FAT in two cases. Postoperatively, 11 out of 12 patients had worsening of neurological symptoms in the form of various speech disturbances. In one patient, speech disturbances developed 2 days after surgery, which was associated with an increase in edema. On examination 3 months after surgery, severe speech disturbances remained in 1 patient. CONCLUSION Resection of frontal lobe tumors in the speech-dominant hemisphere using early postoperative awakening is associated with a high rate of complex speech disorders due to injury to the SLF/AF complex and FAT. In these cases, intraoperative speech mapping with allowance for the course of long association fibers is an essential procedure. Preoperative tractography in combination with intraoperative speech mapping enables identification of association fibers of the SLF/AF complex and FAT, which may help to avoid severe conduction aphasia with poor speech recovery after tumor resection.
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Affiliation(s)
- V Yu Zhukov
- Burdenko Neurosurgical Institute, Moscow, Russia
| | | | - S B Buklina
- Burdenko Neurosurgical Institute, Moscow, Russia; Pirogov Russian National Research Medical University, Moscow, Russia
| | | | - A I Batalov
- Burdenko Neurosurgical Institute, Moscow, Russia
| | | | - A S Kulikov
- Burdenko Neurosurgical Institute, Moscow, Russia
| | - G L Kobyakov
- Burdenko Neurosurgical Institute, Moscow, Russia
| | - A R Sitnikov
- Treatment and Rehabilitation Center of the Russian Ministry of Health, Moscow, Russia
| | - K A Chernyshov
- Sechenov First Moscow State Medical University, Moscow, Russia
| | | | | | - A A Potapov
- Burdenko Neurosurgical Institute, Moscow, Russia
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Garic D, Broce I, Graziano P, Mattfeld A, Dick AS. Laterality of the frontal aslant tract (FAT) explains externalizing behaviors through its association with executive function. Dev Sci 2019; 22:e12744. [PMID: 30159951 PMCID: PMC9828516 DOI: 10.1111/desc.12744] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 08/25/2018] [Indexed: 01/12/2023]
Abstract
We investigated the development of a recently identified white matter pathway, the frontal aslant tract (FAT) and its association with executive function and externalizing behaviors in a sample of 129 neurotypical male and female human children ranging in age from 7 months to 19 years. We found that the FAT could be tracked in 92% of those children, and that the pathway showed age-related differences into adulthood. The change in white matter microstructure was very rapid until about 6 years, and then plateaued, only to show age-related increases again after the age of 11 years. In a subset of those children (5-18 years; n = 70), left laterality of the microstructural properties of the FAT was associated with greater attention problems as measured by the Child Behavior Checklist (CBCL). However, this relationship was fully mediated by higher executive dysfunction as measured by the Behavior Rating Inventory of Executive Function (BRIEF). This relationship was specific to the FAT-we found no relationship between laterality of a control pathway, or of the white matter of the brain in general, and attention and executive function. These findings suggest that the degree to which the developing brain favors a right lateralized structural dominance of the FAT is directly associated with executive function and attention. This novel finding provides a new potential structural biomarker to assess attention deficit hyperactivity disorder (ADHD) and associated executive dysfunction during development.
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Affiliation(s)
- Dea Garic
- Department of Psychology, Florida International University, Miami, FL, 33199
| | - Iris Broce
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, 94143
| | - Paulo Graziano
- Department of Psychology, Florida International University, Miami, FL, 33199
| | - Aaron Mattfeld
- Department of Psychology, Florida International University, Miami, FL, 33199
| | - Anthony Steven Dick
- Department of Psychology, Florida International University, Miami, FL, 33199
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Briggs RG, Chakraborty AR, Anderson CD, Abraham CJ, Palejwala AH, Conner AK, Pelargos PE, O'Donoghue DL, Glenn CA, Sughrue ME. Anatomy and white matter connections of the inferior frontal gyrus. Clin Anat 2019; 32:546-556. [DOI: 10.1002/ca.23349] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 02/01/2019] [Accepted: 02/03/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Robert G. Briggs
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Arpan R. Chakraborty
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Christopher D. Anderson
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Carol J. Abraham
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Ali H. Palejwala
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Andrew K. Conner
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Panayiotis E. Pelargos
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Daniel L. O'Donoghue
- Department of Cell BiologyUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Chad A. Glenn
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
| | - Michael E. Sughrue
- Department of NeurosurgeryUniversity of Oklahoma Health Sciences Center Oklahoma City Oklahoma
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Europa E, Gitelman DR, Kiran S, Thompson CK. Neural Connectivity in Syntactic Movement Processing. Front Hum Neurosci 2019; 13:27. [PMID: 30814941 PMCID: PMC6381040 DOI: 10.3389/fnhum.2019.00027] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 01/21/2019] [Indexed: 01/15/2023] Open
Abstract
Linguistic theory suggests non-canonical sentences subvert the dominant agent-verb-theme order in English via displacement of sentence constituents to argument (NP-movement) or non-argument positions (wh-movement). Both processes have been associated with the left inferior frontal gyrus and posterior superior temporal gyrus, but differences in neural activity and connectivity between movement types have not been investigated. In the current study, functional magnetic resonance imaging data were acquired from 21 adult participants during an auditory sentence-picture verification task using passive and active sentences contrasted to isolate NP-movement, and object- and subject-cleft sentences contrasted to isolate wh-movement. Then, functional magnetic resonance imaging data from regions common to both movement types were entered into a dynamic causal modeling analysis to examine effective connectivity for wh-movement and NP-movement. Results showed greater left inferior frontal gyrus activation for Wh > NP-movement, but no activation for NP > Wh-movement. Both types of movement elicited activity in the opercular part of the left inferior frontal gyrus, left posterior superior temporal gyrus, and left medial superior frontal gyrus. The dynamic causal modeling analyses indicated that neither movement type significantly modulated the connection from the left inferior frontal gyrus to the left posterior superior temporal gyrus, nor vice-versa, suggesting no connectivity differences between wh- and NP-movement. These findings support the idea that increased complexity of wh-structures, compared to sentences with NP-movement, requires greater engagement of cognitive resources via increased neural activity in the left inferior frontal gyrus, but both movement types engage similar neural networks.
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Affiliation(s)
- Eduardo Europa
- Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, United States
| | - Darren R Gitelman
- Advocate Lutheran General Hospital, Park Ridge, IL, United States.,Department of Medicine, Rosalind Franklin University of Medicine and Science, North Chicago, IL, United States.,The Ken and Ruth Davee Department of Neurology Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Swathi Kiran
- College of Health & Rehabilitation Sciences, Boston University, Boston, MA, United States
| | - Cynthia K Thompson
- Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, United States.,The Ken and Ruth Davee Department of Neurology Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States.,Mesulam Cognitive Neurology and Alzheimer's Disease Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
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Structure, asymmetry, and connectivity of the human temporo-parietal aslant and vertical occipital fasciculi. Brain Struct Funct 2018; 224:907-923. [PMID: 30542766 DOI: 10.1007/s00429-018-1812-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 12/04/2018] [Indexed: 10/27/2022]
Abstract
We previously proposed a bipartite 'dorsal-ventral' model of human arcuate fasciculus (AF) morphology. This model does not, however, account for the 'vertical,' temporo-parietal subdivision of the AF described in earlier dissection and tractographic studies. In an effort to address the absence of the vertical AF (VAF) within 'dorsal-ventral' nomenclature, we conducted a dedicated tractographic and white-matter dissection study of this tract and another short, vertical, posterior-hemispheric fascicle: the vertical occipital fasciculus (VOF). We conducted atlas-based, non-tensor, deterministic tractography in 30 single subjects from the Human Connectome Project database and verified our results using an average diffusion atlas compiled from 842 separate normal subjects. We also performed white-matter dissection in four post-mortem specimens. Our tractography results demonstrate that the VAF is, in fact, a bipartite system connecting the ventral parietal and temporal regions, with variable connective, and no volumetric lateralization. The VOF is a non-lateralized, non-segmented system connecting lateral occipital areas with basal-temporal regions. Importantly, the VOF was spatially dissociated from the VAF. As the VAF demonstrates no overall connective or volumetric lateralization, we postulate its distinction from the AF system and propose its re-naming to the 'temporo-parietal aslant tract,' (TPAT), with unique dorsal and ventral subdivisions. Our tractography results were supported by diffusion atlas and white-matter dissection findings.
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Dick AS, Garic D, Graziano P, Tremblay P. The frontal aslant tract (FAT) and its role in speech, language and executive function. Cortex 2018; 111:148-163. [PMID: 30481666 DOI: 10.1016/j.cortex.2018.10.015] [Citation(s) in RCA: 151] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 08/27/2018] [Accepted: 10/18/2018] [Indexed: 12/15/2022]
Abstract
In this review, we examine the structural connectivity of a recently-identified fiber pathway, the frontal aslant tract (FAT), and explore its function. We first review structural connectivity studies using tract-tracing methods in non-human primates, and diffusion-weighted imaging and electrostimulation in humans. These studies suggest a monosynaptic connection exists between the lateral inferior frontal gyrus and the pre-supplementary and supplementary motor areas of the medial superior frontal gyrus. This connection is termed the FAT. We then review research on the left FAT's putative role in supporting speech and language function, with particular focus on speech initiation, stuttering and verbal fluency. Next, we review research on the right FAT's putative role supporting executive function, namely inhibitory control and conflict monitoring for action. We summarize the extant body of empirical work by suggesting that the FAT plays a domain general role in the planning, timing, and coordination of sequential motor movements through the resolution of competition among potential motor plans. However, we also propose some domain specialization across the hemispheres. On the left hemisphere, the circuit is proposed to be specialized for speech actions. On the right hemisphere, the circuit is proposed to be specialized for general action control of the organism, especially in the visuo-spatial domain. We close the review with a discussion of the clinical significance of the FAT, and suggestions for further research on the pathway.
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Affiliation(s)
| | - Dea Garic
- Department of Psychology, Florida International University, Miami, FL, USA
| | - Paulo Graziano
- Department of Psychology, Florida International University, Miami, FL, USA
| | - Pascale Tremblay
- Departement de Readaptation, Université Laval, Quebec City, Quebec, Canada; CERVO Brain Research Center, Quebec City, Canada
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38
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Nestrasil I, Svatkova A, Rudser KD, Chityala R, Wakumoto A, Mueller BA, Bednařík P, Tuite P, Wu X, Bushara K. White matter measures correlate with essential tremor severity-A pilot diffusion tensor imaging study. Brain Behav 2018; 8:e01039. [PMID: 29964316 PMCID: PMC6085909 DOI: 10.1002/brb3.1039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 05/15/2018] [Accepted: 06/04/2018] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND An evolving pathophysiological concept of essential tremor (ET) points to diffuse brain network involvement, which emphasizes the need to investigate white matter (WM) changes associated with motor symptoms of ET. OBJECTIVES To investigate ET-related WM changes and WM correlates of tremor severity using tremor clinical rating scales and accelerometry. METHODS Tract-based spatial statistics (TBSS) approach was utilized to compare 3 Tesla diffusion tensor imaging (DTI) data from 12 ET patients and 10 age- and gender-matched healthy individuals. Clinical scales, tremor frequency and amplitude as measured by accelerometry were correlated with DTI data. RESULTS ET patients demonstrated mean (MD) and radial diffusivity (RD) abnormalities in tracts involved in primary and associative motor functions such as bilateral corticospinal tracts, the superior longitudinal fascicles, and the corpus callosum but also in nonmotor regions including the inferior fronto-occipital and longitudinal fascicles, cingulum bundles, anterior thalamic radiations, and uncinate fascicles. A combined tremor frequency and amplitude score correlated with RD and MD in extensive WM areas, which partially overlapped the regions that were associated with tremor frequency. No significant relationship was found between DTI measures and clinical rating scales scores. CONCLUSIONS The results show that ET-related diffusion WM changes and their correlates with tremor severity are preferentially located in the primary and associative motor areas. In contrast, a relationship between WM was not detected with clinical rating scales. Accelerometry parameters may, therefore, serve as a potentially useful clinical measures that relate to WM deficits in ET.
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Affiliation(s)
- Igor Nestrasil
- Division of Clinical Behavioral NeuroscienceDepartment of PediatricsUniversity of MinnesotaMinneapolisMinnesota
| | - Alena Svatkova
- Division of Clinical Behavioral NeuroscienceDepartment of PediatricsUniversity of MinnesotaMinneapolisMinnesota
- Department of Medicine III, Clinical Division of Endocrinology and MetabolismMedical University of ViennaViennaAustria
- Multimodal and Functional Neuroimaging Research GroupCentral European Institute of TechnologyMasaryk UniversityBrnoCzech Republic
| | - Kyle D. Rudser
- Division of BiostatisticsUniversity of MinnesotaMinneapolisMinnesota
| | | | - Amy Wakumoto
- Division of Clinical Behavioral NeuroscienceDepartment of PediatricsUniversity of MinnesotaMinneapolisMinnesota
| | - Bryon A. Mueller
- Department of PsychiatryUniversity of MinnesotaMinneapolisMinnesota
| | - Petr Bednařík
- Multimodal and Functional Neuroimaging Research GroupCentral European Institute of TechnologyMasaryk UniversityBrnoCzech Republic
- Department of RadiologyCenter for Magnetic Resonance ResearchUniversity of MinnesotaMinneapolisMinnesota
- High Field MR CentreDepartment of Biomedical Imaging and Image‐guided TherapyMedical University of ViennaViennaAustria
| | - Paul Tuite
- Department of NeurologyUniversity of MinnesotaMinneapolisMinnesota
| | - Xiang Wu
- Psychology DepartmentSun Yet‐Sen UniversityGuangzhouGuangdongChina
| | - Khalaf Bushara
- Department of NeurologyUniversity of MinnesotaMinneapolisMinnesota
- Neurology ServiceVeterans Affairs Medical CenterMinneapolisMinnesota
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Herbet G, Moritz-Gasser S, Boiseau M, Duvaux S, Cochereau J, Duffau H. Converging evidence for a cortico-subcortical network mediating lexical retrieval. Brain 2018; 139:3007-3021. [PMID: 27604309 DOI: 10.1093/brain/aww220] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 07/13/2016] [Indexed: 11/12/2022] Open
Affiliation(s)
- Guillaume Herbet
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, F-34295, Montpellier, France.,Institute for Neuroscience of Montpellier (INM), INSERM-1051, Team 4, Saint-Eloi Hospital, Montpellier University Medical Center, F-34091, Montpellier, France
| | - Sylvie Moritz-Gasser
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, F-34295, Montpellier, France.,Institute for Neuroscience of Montpellier (INM), INSERM-1051, Team 4, Saint-Eloi Hospital, Montpellier University Medical Center, F-34091, Montpellier, France.,Department of Neurology, Gui de Chauliac Hospital, Montpellier University Medical Center, F-34295, Montpellier, France
| | - Morgane Boiseau
- Department of Neurology, Gui de Chauliac Hospital, Montpellier University Medical Center, F-34295, Montpellier, France
| | - Sophie Duvaux
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, F-34295, Montpellier, France
| | - Jérôme Cochereau
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, F-34295, Montpellier, France
| | - Hugues Duffau
- Department of Neurosurgery, Gui de Chauliac Hospital, Montpellier University Medical Center, F-34295, Montpellier, France.,Institute for Neuroscience of Montpellier (INM), INSERM-1051, Team 4, Saint-Eloi Hospital, Montpellier University Medical Center, F-34091, Montpellier, France
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Koutsarnakis C, Liakos F, Kalyvas AV, Skandalakis GP, Komaitis S, Christidi F, Karavasilis E, Liouta E, Stranjalis G. The Superior Frontal Transsulcal Approach to the Anterior Ventricular System: Exploring the Sulcal and Subcortical Anatomy Using Anatomic Dissections and Diffusion Tensor Imaging Tractography. World Neurosurg 2017; 106:339-354. [DOI: 10.1016/j.wneu.2017.06.161] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 06/24/2017] [Accepted: 06/28/2017] [Indexed: 10/19/2022]
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Decreased integrity of the fronto-temporal fibers of the left inferior occipito-frontal fasciculus associated with auditory verbal hallucinations in schizophrenia. Brain Imaging Behav 2017; 10:445-54. [PMID: 26112051 DOI: 10.1007/s11682-015-9421-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Auditory verbal hallucinations (AVH) have been proposed to result from altered connectivity between frontal speech production regions and temporal speech perception regions. Whilst the dorsal language pathway, serviced by the arcuate fasciculus, has been extensively studied in relation to AVH, the ventral language pathway, serviced by the inferior occipito-frontal fasciculus (IOFF) has been rarely studied in relation to AVH. This study examined whether structural changes in anatomically defined subregions of the IOFF were associated with AVH in patients with schizophrenia. Diffusion tensor imaging scans and clinical data were obtained from the Australian Schizophrenia Research Bank for 113 schizophrenia patients, of whom 39 had lifetime experience of AVH (18 had current AVH, 21 had remitted AVH), 74 had no lifetime experience of AVH, and 40 healthy controls. Schizophrenia patients with a lifetime experience of AVH exhibited reduced fractional anisotropy (FA) in the fronto-temporal fibers of the left IOFF compared to both healthy controls and schizophrenia patients without AVH. In contrast, structural abnormalities in the temporal and occipital regions of the IOFF were observed bilaterally in both patient groups, relative to the healthy controls. These results suggest that while changes in the structural integrity of the bilateral IOFF are associated with schizophrenia per se, integrity reductions in the fronto-temporal fibers of the left IOFF may be specifically associated with AVH.
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Goryainov SA, Kondrashov AV, Gol'dberg MF, Batalov AI, Sufianov RA, Zakharova NE, Pronin IN, Gol'bin DA, Zhukov VY, Dobrovol'sky GF, Shelyakin SY, Vorob'ev VN, Dadykin SS, Potapov AA. [Long association tracts of the human white matter: an analysis of 18 hemisphere dissections and in vivo HARDI-CSD tractography]. ZHURNAL VOPROSY NEĬROKHIRURGII IMENI N. N. BURDENKO 2017; 81:13-25. [PMID: 28291210 DOI: 10.17116/neiro201780713-25] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND Anatomy of the conduction tracts of the cerebral cortex has been studied for a long time. Invention of diffusion tensor tractography renewed interest in this subject. The objectives of this work were to develop and improve protocols for dissection of the long association tracts of the human brain with studying the features of their segmentation, topography, and variability, compare the obtained data with the MR tractography data, and prepare for further clinical and anatomical studies. MATERIAL AND METHODS We used 18 cerebral hemispheres (from 10 males and 8 females; 9 left and 9 right hemispheres). The mean age of cadavers was 68 years. Specimen were fixated in accordance with the Klingler technique. Immediately after collection, specimens were placed in a 10% formalin solution for at least 4 weeks. After that, the pia was removed; specimens were frozen at -20 °C for a week and then unfrozen in a 96% ethanol solution for a day. We performed 10 lateral dissections, 2 lateral dissections with isolation of the frontal aslant tract, 2 basal dissections, 1 combined basolateral dissection, 2 frontal dissections, and 1 medial dissection. At the time of dissection and after it, specimens were stored in a 96% ethanol solution. Modified, disposable, therapeutic wooden spatulas were used for manipulations. A microscope (magnification of 6-40x) was used in 2 lateral and 2 basal dissections. MR tractography (HARDI-CSD) was carried out in 5 healthy volunteers using a GE Signa HDxt MRI scanner a field strength of 3.0 T. RESULTS We clearly identified the following fascicles: the arcuate fascicle (AF) and superior longitudinal fascicle (SLF) in 6/6 hemispheres on the right and in 5/6 hemispheres on the left, the inferior longitudinal fascicle (ILF) in 3/6 hemispheres on the left and in 4/6 hemispheres on the right, the uncinate fascicle (UF) in 4/4 hemispheres on the left and in 4/4 hemispheres on the right, and the inferior fronto-occipital fascicle (IFOF) in 4/4 hemispheres on the left and in 3/4 hemispheres on the right. Identification was less successful in the case of the frontal aslant tract (FAT) in 1/2 hemispheres on the left and in 0/2 hemispheres on the right. The used technique failed to identify the vertical occipital fascicle (VOF) of Wernicke, a segment of the superior longitudinal fascicle SLF I, and the middle longitudinal fascicle (MdLF). The MR tractography HARDI-CSD data were compared with the dissection data. We described in detail segmentation of the superior longitudinal, arcuate, and inferior fronto-occipital fascicles. Contradictory data were obtained for the superior longitudinal fascicle: a two-segment structure (SLFh and SLFv) was found in most (10/12) specimens, while a three-segment structure was revealed in the other (2/12) specimens (identified SLF II and SLF III). In the arcuate fascicle, the ventral and dorsal segments were successfully identified in 2/12 cases (1 left and 1 right), whereas identification failed in the other cases. During dissection of the inferior fronto-occipital fascicle, we could identify its surface layer in 1 of 8 cases (left) and its deep layer in one more case (left). CONCLUSION Examination of the long association tracts using the Klingler technique has significant limitations in the fiber intersection areas (sagittal striatum). The frontal aslant tract was least studied; we proposed a special anterior dissection technique for its isolation. The superior longitudinal fascicle can have both the two-segment (10/12) and three-segment (2/12) structure. Investigation of the segmental anatomy of the long association tracts will be continued in further dissections. When planning neurosurgical interventions in the projection areas of the long association tracts, both preoperative HARDI-tractography and anatomical dissections ex vivo, based on the proposed protocols, can be recommended for the operating surgeon to master a three-dimensional picture of the tract topography.
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Affiliation(s)
| | - A V Kondrashov
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - M F Gol'dberg
- Burdenko Neurosurgical Institute, Moscow, Russia; Sechenov First Moscow State Medical University, Moscow, Russia
| | - A I Batalov
- Burdenko Neurosurgical Institute, Moscow, Russia
| | - R A Sufianov
- Sechenov First Moscow State Medical University, Moscow, Russia
| | | | - I N Pronin
- Burdenko Neurosurgical Institute, Moscow, Russia
| | - D A Gol'bin
- Burdenko Neurosurgical Institute, Moscow, Russia
| | - V Yu Zhukov
- Burdenko Neurosurgical Institute, Moscow, Russia
| | | | | | - V N Vorob'ev
- Smolensk State Medical University, Smolensk, Russia
| | - S S Dadykin
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - A A Potapov
- Burdenko Neurosurgical Institute, Moscow, Russia
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Docx L, Emsell L, Van Hecke W, De Bondt T, Parizel PM, Sabbe B, Morrens M. White matter microstructure and volitional motor activity in schizophrenia: A diffusion kurtosis imaging study. Psychiatry Res Neuroimaging 2017; 260:29-36. [PMID: 28012424 DOI: 10.1016/j.pscychresns.2016.10.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 09/18/2016] [Accepted: 10/14/2016] [Indexed: 12/13/2022]
Abstract
Avolition is a core feature of schizophrenia and may arise from altered brain connectivity. Here we used diffusion kurtosis imaging (DKI) to investigate the association between white matter (WM) microstructure and volitional motor activity. Multi-shell diffusion MRI and 24-h actigraphy data were obtained from 20 right-handed patients with schizophrenia and 16 right-handed age and gender matched healthy controls. We examined correlations between fractional anisotropy (FA), mean diffusivity (MD), mean kurtosis (MK), and motor activity level, as well as group differences in these measures. In the patient group, increasing motor activity level was positively correlated with MK in the inferior, medial and superior longitudinal fasciculus, the corpus callosum, the posterior fronto-occipital fasciculus and the posterior cingulum. This association was not found in control subjects or in DTI measures. These results show that a lack of volitional motor activity in schizophrenia is associated with potentially altered WM microstructure in posterior brain regions associated with cognitive function and motivation. This could reflect both illness related dysconnectivity which through altered cognition, manifests as reduced volitional motor activity, and/or the effects of reduced physical activity on brain WM.
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Affiliation(s)
- Lise Docx
- Collaborative Antwerp Psychiatric Research Institute (CAPRI), University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; PC Broeders Alexianen Boechout, Provinciesteenweg 408, 2530 Boechout, Belgium.
| | - Louise Emsell
- University Psychiatry Centre (UPC)-KU Leuven, Leuven, Belgium
| | - Wim Van Hecke
- Department of Radiology, Antwerp University Hospital & University of Antwerp, Antwerp, Belgium
| | - Timo De Bondt
- Department of Radiology, Antwerp University Hospital & University of Antwerp, Antwerp, Belgium
| | - Paul M Parizel
- Department of Radiology, Antwerp University Hospital & University of Antwerp, Antwerp, Belgium
| | - Bernard Sabbe
- Collaborative Antwerp Psychiatric Research Institute (CAPRI), University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; PZ St Norbertus Duffel, Stationsstraat 25c, 2570 Duffel, Belgium
| | - Manuel Morrens
- Collaborative Antwerp Psychiatric Research Institute (CAPRI), University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium; PC Broeders Alexianen Boechout, Provinciesteenweg 408, 2530 Boechout, Belgium
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Intrasession and Intersession Repeatability of Diffusion Tensor Imaging in Healthy Human Liver. J Comput Assist Tomogr 2017; 41:578-585. [DOI: 10.1097/rct.0000000000000572] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Loss of Consciousness Is Related to White Matter Injury in Mild Traumatic Brain Injury. J Neurotrauma 2016; 33:2000-2010. [DOI: 10.1089/neu.2015.4212] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Harada K, Matsuo K, Nakashima M, Hobara T, Higuchi N, Higuchi F, Nakano M, Otsuki K, Shibata T, Watanuki T, Matsubara T, Fujita Y, Shimoji K, Yamagata H, Watanabe Y. Disrupted orbitomedial prefrontal limbic network in individuals with later-life depression. J Affect Disord 2016; 204:112-9. [PMID: 27344619 DOI: 10.1016/j.jad.2016.06.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 06/09/2016] [Accepted: 06/11/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND Depression in old age is an increasing contributor to poor health and accompanying health care costs. Although there is an abundance of literature on later-life depression (LLD), the neural correlates have not been clarified. The aim of this study was to determine whether patients with LLD show abnormal gray matter volume (GMV) and white matter integrity by using multiple image analysis methods. METHODS The study included 45 patients with LLD and 61 healthy participants who were matched for age, sex, years of education, and vascular risk factors. GMV was examined using voxel-based morphometry, while the white matter integrity was determined by tract-based spatial statistics and tract-specific analysis, which were obtained from high-resolution magnetic resonance images. RESULTS Patients with LLD showed significantly less GMV in the orbitofrontal cortex, anterior cingulate, insula, amygdala, and temporal regions, as well as higher fractional anisotropy in the uncinate fasciculus, compared with healthy participants. Patients with LLD who had reduced orbitofrontal and insular GMV had more severe clinical variables. The reduced orbitofrontal GMV was associated with higher fractional anisotropy in the uncinate fasciculus. LIMITATION The effects of medication should also be considered when interpreting the results of this study. CONCLUSION Our results suggest that regional GMV is linked to white matter integrity of the uncinate fasciculus in the orbitomedial prefrontal limbic network, and the disruption of this network may be involved in the pathophysiology of LLD.
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Affiliation(s)
- Kenichiro Harada
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Koji Matsuo
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan.
| | - Mami Nakashima
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan; Nagato-ichinomiya Hospital, Shimonoseki, Yamaguchi, Japan
| | - Teruyuki Hobara
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan; Department of Psychiatry, Yamaguchi Grand Medical Center, Hofu, Yamaguchi, Japan
| | - Naoko Higuchi
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Fumihiro Higuchi
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Masayuki Nakano
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan; Katakura Hospital, Ube, Yamaguchi, Japan
| | - Koji Otsuki
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan; Konan Hospital, Matsue, Shimane, Japan
| | - Tomohiko Shibata
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan; Shinwaen Hospital, Onoda, Yamaguchi, Japan
| | - Toshio Watanuki
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Toshio Matsubara
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan; Health Administration Center, Yamaguchi University Organization for University Education, Yamaguchi, Yamaguchi, Japan
| | - Yusuke Fujita
- Department of Biomolecular Engineering Applied Molecular Bioscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Keigo Shimoji
- Department of Radiology, Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan
| | - Hirotaka Yamagata
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Yoshifumi Watanabe
- Division of Neuropsychiatry, Department of Neuroscience, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
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Vervoort G, Leunissen I, Firbank M, Heremans E, Nackaerts E, Vandenberghe W, Nieuwboer A. Structural Brain Alterations in Motor Subtypes of Parkinson's Disease: Evidence from Probabilistic Tractography and Shape Analysis. PLoS One 2016; 11:e0157743. [PMID: 27314952 PMCID: PMC4912098 DOI: 10.1371/journal.pone.0157743] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/05/2016] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND AND OBJECTIVES The postural instability and gait disorder (PIGD) and tremor dominant (TD) subtypes of Parkinson's disease (PD) show different patterns of alterations in functional connectivity (FC) between specific brain regions. This study aimed to investigate the relation between symptomatic heterogeneity in PD and structural alterations underlying these FC changes. METHODS 68 PD patients classified as PIGD (n = 41) or TD (n = 19) and 19 age-matched controls underwent Magnetic Resonance Imaging (MRI). Diffusion-weighted images were used to assess fractional anisotropy (FA) and mean diffusivity (MD) at the whole-brain level using tract-based spatial statistics (TBSS). In addition, structural connectivity was assessed between regions that previously showed altered FC using probabilistic tractography. Anatomical images were used to determine shape and volume of the putamen, caudate and pallidum. RESULTS TBSS revealed widespread FA reductions in PIGD compared to controls involving the superior longitudinal fasciculi and corpus callosum. No such differences were found in TD. Both PD subgroups had increased MD compared to controls in tracts connecting the left caudate with the bilateral ventral putamen. TD patients additionally showed increased MD compared to PIGD and controls in tracts connecting the right inferior parietal lobule with the right premotor and primary motor cortex, which previously showed altered FC. We also found grey matter atrophy in the rostrodorsal head of the caudate in PIGD compared to controls. CONCLUSION Microstructural changes in white matter tracts, particularly in those connecting striatal sub-areas, partly underlie FC alterations in PD subtypes. Caudate shape alterations further implicate the striatum in PIGD pathophysiology.
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Affiliation(s)
- Griet Vervoort
- KU Leuven, Department of Rehabilitation Sciences, Tervuursevest 101/1501, 3001, Leuven, Belgium
- * E-mail:
| | - Inge Leunissen
- KU Leuven, Department of Kinesiology, Tervuursevest 101/1501, 3001, Leuven, Belgium
| | - Michael Firbank
- Institute of Neuroscience and Newcastle University Institute for Ageing, Campus for Ageing and Vitality, Newcastle University, Newcastle upon Tyne, NE4 5PL, United Kingdom
| | - Elke Heremans
- KU Leuven, Department of Rehabilitation Sciences, Tervuursevest 101/1501, 3001, Leuven, Belgium
| | - Evelien Nackaerts
- KU Leuven, Department of Rehabilitation Sciences, Tervuursevest 101/1501, 3001, Leuven, Belgium
| | - Wim Vandenberghe
- University Hospitals Leuven, Department of Neurology, Herestraat 49, 3000 Leuven, Belgium; KU Leuven, Department of Neurosciences, Herestraat 49, 3000, Leuven, Belgium
| | - Alice Nieuwboer
- KU Leuven, Department of Rehabilitation Sciences, Tervuursevest 101/1501, 3001, Leuven, Belgium
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Güngör A, Baydin S, Middlebrooks EH, Tanriover N, Isler C, Rhoton AL. The white matter tracts of the cerebrum in ventricular surgery and hydrocephalus. J Neurosurg 2016; 126:945-971. [PMID: 27257832 DOI: 10.3171/2016.1.jns152082] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The relationship of the white matter tracts to the lateral ventricles is important when planning surgical approaches to the ventricles and in understanding the symptoms of hydrocephalus. The authors' aim was to explore the relationship of the white matter tracts of the cerebrum to the lateral ventricles using fiber dissection technique and MR tractography and to discuss these findings in relation to approaches to ventricular lesions. METHODS Forty adult human formalin-fixed cadaveric hemispheres (20 brains) and 3 whole heads were examined using fiber dissection technique. The dissections were performed from lateral to medial, medial to lateral, superior to inferior, and inferior to superior. MR tractography showing the lateral ventricles aided in the understanding of the 3D relationships of the white matter tracts with the lateral ventricles. RESULTS The relationship between the lateral ventricles and the superior longitudinal I, II, and III, arcuate, vertical occipital, middle longitudinal, inferior longitudinal, inferior frontooccipital, uncinate, sledge runner, and lingular amygdaloidal fasciculi; and the anterior commissure fibers, optic radiations, internal capsule, corona radiata, thalamic radiations, cingulum, corpus callosum, fornix, caudate nucleus, thalamus, stria terminalis, and stria medullaris thalami were defined anatomically and radiologically. These fibers and structures have a consistent relationship to the lateral ventricles. CONCLUSIONS Knowledge of the relationship of the white matter tracts of the cerebrum to the lateral ventricles should aid in planning more accurate surgery for lesions within the lateral ventricles.
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Affiliation(s)
| | | | - Erik H Middlebrooks
- Radiology, and the.,K. Scott and E. R. Andrew Advanced Neuroimaging Lab, College of Medicine, University of Florida, Gainesville, Florida; and
| | - Necmettin Tanriover
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Cihan Isler
- Department of Neurosurgery, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
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Kim YJ, Kwon HK, Lee JM, Cho H, Kim HJ, Park HK, Jung NY, San Lee J, Lee J, Jang YK, Kim ST, Lee KH, Choe YS, Kim YJ, Na DL, Seo SW. Gray and white matter changes linking cerebral small vessel disease to gait disturbances. Neurology 2016; 86:1199-207. [PMID: 26935893 DOI: 10.1212/wnl.0000000000002516] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 11/06/2015] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To investigate the topographic changes of white matter (WM) integrity and cortical thickness related to gait disturbances and determine whether these neural correlates mediate the association between cerebral small vessel disease (CSVD) and gait disturbances. METHODS A total of 129 patients with subcortical vascular cognitive impairment were included. CSVD severity was quantified as global and regional WM hyperintensities (WMH) volume and lacune and microbleed numbers. Amyloid burdens were assessed using Pittsburgh compound B (PiB)-PET scanning. Gait score was measured using a standardized scale. WM integrity was assessed by applying tract-based spatial statistics. Cortical thickness was measured using surface-based methods. Path analysis for gait score was performed using regional CSVD markers as predictors and fractional anisotropy (FA) and cortical thickness as mediators. RESULTS Periventricular WMH (PWMH) volume was associated with gait score, regardless of other CSVD. PiB retention ratio was not associated with gait score. Gait score was correlated with FA in the frontal and parietal WM and bilateral corpus callosum and with cortical thinning in the bilateral frontal and lateral temporo-parieto-occipital regions. Path analysis for gait score showed that PWMH contributed to gait disturbances with the mediation of mean FA or cortical thickness. CONCLUSIONS Our findings suggest that WMH-related cortical thinning as well as disrupted integrity of periventricular WM is linked to gait disturbances.
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Affiliation(s)
- Yeo Jin Kim
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Hun Ki Kwon
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Jong Min Lee
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Hanna Cho
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Hee Jin Kim
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Hee Kyung Park
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Na-Yeon Jung
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Jin San Lee
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Juyoun Lee
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Young Kyoung Jang
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Sung Tae Kim
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Kyung Han Lee
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Yearn Seong Choe
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Yun Joong Kim
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Duk L Na
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea
| | - Sang Won Seo
- From the Department of Neurology (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), Neuroscience Center (Y.J.K., H.J.K., N.-Y.J., J.S.L., J.L., Y.K.J., D.L.N., S.W.S.), and Nuclear Medicine (K.H.L., Y.S.C.), Samsung Medical Center, Sungkyunkwan University School of Medicine; Department of Biomedical Engineering (H.K.K., J.M.L.), Hanyang University; Department of Neurology (H.C.), Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul; Department of Neurology (H.K.P.), Inje University Ilsan Paik Hospital, Goyang; and Radiology (S.T.K.) and Department of Neurology (Y.J.K.), Hallym University, Gangwon-do,Korea.
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Ten Brink AF, Biesbroek JM, Kuijf HJ, Van der Stigchel S, Oort Q, Visser-Meily JMA, Nijboer TCW. The right hemisphere is dominant in organization of visual search-A study in stroke patients. Behav Brain Res 2016; 304:71-9. [PMID: 26876010 DOI: 10.1016/j.bbr.2016.02.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/14/2016] [Accepted: 02/04/2016] [Indexed: 11/18/2022]
Abstract
Cancellation tasks are widely used for diagnosis of lateralized attentional deficits in stroke patients. A disorganized fashion of target cancellation has been hypothesized to reflect disturbed spatial exploration. In the current study we aimed to examine which lesion locations result in disorganized visual search during cancellation tasks, in order to determine which brain areas are involved in search organization. A computerized shape cancellation task was administered in 78 stroke patients. As an index for search organization, the amount of intersections of paths between consecutive crossed targets was computed (i.e., intersections rate). This measure is known to accurately depict disorganized visual search in a stroke population. Ischemic lesions were delineated on CT or MRI images. Assumption-free voxel-based lesion-symptom mapping and region of interest-based analyses were used to determine the grey and white matter anatomical correlates of the intersections rate as a continuous measure. The right lateral occipital cortex, superior parietal lobule, postcentral gyrus, superior temporal gyrus, middle temporal gyrus, supramarginal gyrus, inferior longitudinal fasciculus, first branch of the superior longitudinal fasciculus (SLF I), and the inferior fronto-occipital fasciculus, were related to search organization. To conclude, a clear right hemispheric dominance for search organization was revealed. Further, the correlates of disorganized search overlap with regions that have previously been associated with conjunctive search and spatial working memory. This suggests that disorganized visual search is caused by disturbed spatial processes, rather than deficits in high level executive function or planning, which would be expected to be more related to frontal regions.
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Affiliation(s)
- Antonia F Ten Brink
- Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, University Medical Center Utrecht and De Hoogstraat Rehabilitation, Utrecht, The Netherlands
| | - J Matthijs Biesbroek
- Department of Neurology, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Hugo J Kuijf
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Stefan Van der Stigchel
- Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands
| | - Quirien Oort
- Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, University Medical Center Utrecht and De Hoogstraat Rehabilitation, Utrecht, The Netherlands
| | - Johanna M A Visser-Meily
- Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, University Medical Center Utrecht and De Hoogstraat Rehabilitation, Utrecht, The Netherlands
| | - Tanja C W Nijboer
- Brain Center Rudolf Magnus and Center of Excellence for Rehabilitation Medicine, University Medical Center Utrecht and De Hoogstraat Rehabilitation, Utrecht, The Netherlands; Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands.
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