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Valdebenito-Oyarzo G, Martínez-Molina MP, Soto-Icaza P, Zamorano F, Figueroa-Vargas A, Larraín-Valenzuela J, Stecher X, Salinas C, Bastin J, Valero-Cabré A, Polania R, Billeke P. The parietal cortex has a causal role in ambiguity computations in humans. PLoS Biol 2024; 22:e3002452. [PMID: 38198502 PMCID: PMC10824459 DOI: 10.1371/journal.pbio.3002452] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 01/23/2024] [Accepted: 11/28/2023] [Indexed: 01/12/2024] Open
Abstract
Humans often face the challenge of making decisions between ambiguous options. The level of ambiguity in decision-making has been linked to activity in the parietal cortex, but its exact computational role remains elusive. To test the hypothesis that the parietal cortex plays a causal role in computing ambiguous probabilities, we conducted consecutive fMRI and TMS-EEG studies. We found that participants assigned unknown probabilities to objective probabilities, elevating the uncertainty of their decisions. Parietal cortex activity correlated with the objective degree of ambiguity and with a process that underestimates the uncertainty during decision-making. Conversely, the midcingulate cortex (MCC) encodes prediction errors and increases its connectivity with the parietal cortex during outcome processing. Disruption of the parietal activity increased the uncertainty evaluation of the options, decreasing cingulate cortex oscillations during outcome evaluation and lateral frontal oscillations related to value ambiguous probability. These results provide evidence for a causal role of the parietal cortex in computing uncertainty during ambiguous decisions made by humans.
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Affiliation(s)
- Gabriela Valdebenito-Oyarzo
- Laboratorio de Neurociencia Social y Neuromodulación, Centro de Investigación en Complejidad Social, (neuroCICS), Facultad de Gobierno, Universidad del Desarrollo, Santiago, Chile
| | - María Paz Martínez-Molina
- Laboratorio de Neurociencia Social y Neuromodulación, Centro de Investigación en Complejidad Social, (neuroCICS), Facultad de Gobierno, Universidad del Desarrollo, Santiago, Chile
| | - Patricia Soto-Icaza
- Laboratorio de Neurociencia Social y Neuromodulación, Centro de Investigación en Complejidad Social, (neuroCICS), Facultad de Gobierno, Universidad del Desarrollo, Santiago, Chile
| | - Francisco Zamorano
- Unidad de Neuroimágenes Cuantitativas avanzadas (UNICA), Departamento de Imágenes, Clínica Alemana de Santiago, Santiago, Chile
- Facultad de Ciencias para el Cuidado de la Salud, Campus Los Leones, Universidad San Sebastián, Santiago, Chile
| | - Alejandra Figueroa-Vargas
- Laboratorio de Neurociencia Social y Neuromodulación, Centro de Investigación en Complejidad Social, (neuroCICS), Facultad de Gobierno, Universidad del Desarrollo, Santiago, Chile
| | - Josefina Larraín-Valenzuela
- Laboratorio de Neurociencia Social y Neuromodulación, Centro de Investigación en Complejidad Social, (neuroCICS), Facultad de Gobierno, Universidad del Desarrollo, Santiago, Chile
| | - Ximena Stecher
- Unidad de Neuroimágenes Cuantitativas avanzadas (UNICA), Departamento de Imágenes, Clínica Alemana de Santiago, Santiago, Chile
| | - César Salinas
- Unidad de Neuroimágenes Cuantitativas avanzadas (UNICA), Departamento de Imágenes, Clínica Alemana de Santiago, Santiago, Chile
| | - Julien Bastin
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, Grenoble, France
| | - Antoni Valero-Cabré
- Causal Dynamics, Plasticity and Rehabilitation Group, FRONTLAB team, Institut du Cerveau et de la Moelle Epinière (ICM), CNRS UMR 7225, INSERM U 1127 and Sorbonne Université, Paris, France
- Cognitive Neuroscience and Information Technology Research Program, Open University of Catalonia (UOC), Barcelona, Spain
- Laboratory for Cerebral Dynamics Plasticity and Rehabilitation, Boston University, School of Medicine, Boston, Massachusetts, United States of America
| | - Rafael Polania
- Decision Neuroscience Lab, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Pablo Billeke
- Laboratorio de Neurociencia Social y Neuromodulación, Centro de Investigación en Complejidad Social, (neuroCICS), Facultad de Gobierno, Universidad del Desarrollo, Santiago, Chile
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Gunia A, Moraresku S, Janča R, Ježdík P, Kalina A, Hammer J, Marusič P, Vlček K. The brain dynamics of visuospatial perspective-taking captured by intracranial EEG. Neuroimage 2024; 285:120487. [PMID: 38072339 DOI: 10.1016/j.neuroimage.2023.120487] [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: 02/05/2023] [Revised: 09/18/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
Visuospatial perspective-taking (VPT) is the ability to imagine a scene from a position different from the one used in self-perspective judgments (SPJ). We typically use VPT to understand how others see the environment. VPT requires overcoming the self-perspective, and impairments in this process are implicated in various brain disorders, such as schizophrenia and autism. However, the underlying brain areas of VPT are not well distinguished from SPJ-related ones and from domain-general responses to both perspectives. In addition, hierarchical processing theory suggests that domain-specific processes emerge over time from domain-general ones. It mainly focuses on the sensory system, but outside of it, support for this hypothesis is lacking. Therefore, we aimed to spatiotemporally distinguish brain responses domain-specific to VPT from the specific ones to self-perspective, and domain-general responses to both perspectives. In particular, we intended to test whether VPT- and SPJ specific responses begin later than the general ones. We recorded intracranial EEG data from 30 patients with epilepsy who performed a task requiring laterality judgments during VPT and SPJ, and analyzed the spatiotemporal features of responses in the broad gamma band (50-150 Hz). We found VPT-specific processing in a more extensive brain network than SPJ-specific processing. Their dynamics were similar, but both differed from the general responses, which began earlier and lasted longer. Our results anatomically distinguish VPT-specific from SPJ-specific processing. Furthermore, we temporally differentiate between domain-specific and domain-general processes both inside and outside the sensory system, which serves as a novel example of hierarchical processing.
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Affiliation(s)
- Anna Gunia
- Laboratory of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic; Charles University, Third Faculty of Medicine, Prague, Czech Republic.
| | - Sofiia Moraresku
- Laboratory of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic; Charles University, Third Faculty of Medicine, Prague, Czech Republic
| | - Radek Janča
- Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Petr Ježdík
- Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Adam Kalina
- Department of Neurology, Second Faculty of Medicine, Charles University, Motol University Hospital, Prague, Czech Republic
| | - Jiří Hammer
- Department of Neurology, Second Faculty of Medicine, Charles University, Motol University Hospital, Prague, Czech Republic
| | - Petr Marusič
- Department of Neurology, Second Faculty of Medicine, Charles University, Motol University Hospital, Prague, Czech Republic
| | - Kamil Vlček
- Laboratory of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic.
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Guo X, Wang S, Lin X, Wang Z, Dou Y, Cao Y, Zhang Y, Luo X, Kang L, Yu T, Wang Z, Tan Y, Gao S, Zheng H, Zhao F, Wang H, Wang K, Xie F, Chen W, Luo X. A novel risk variant block across introns 36-45 of CACNA1C for schizophrenia: a cohort-wise replication and cerebral region-wide validation study. Psychiatr Genet 2023; 33:182-190. [PMID: 37706495 PMCID: PMC10502955 DOI: 10.1097/ypg.0000000000000344] [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] [Indexed: 09/15/2023]
Abstract
OBJECTIVES Numerous genome-wide association studies have identified CACNA1C as one of the top risk genes for schizophrenia. As a necessary post-genome-wide association study (GWAS) follow-up, here, we focused on this risk gene, carefully investigated its novel risk variants for schizophrenia, and explored their potential functions. METHODS We analyzed four independent samples (including three European and one African-American) comprising 5648 cases and 6936 healthy subjects to identify replicable single nucleotide polymorphism-schizophrenia associations. The potential regulatory effects of schizophrenia-risk alleles on CACNA1C mRNA expression in 16 brain regions (n = 348), gray matter volumes (GMVs) of five subcortical structures (n = 34 431), and surface areas and thickness of 34 cortical regions (n = 36 936) were also examined. RESULTS A novel 17-variant block across introns 36-45 of CACNA1C was significantly associated with schizophrenia in the same effect direction across at least two independent samples (1.8 × 10-4 ≤ P ≤ 0.049). Most risk variants within this block showed significant associations with CACNA1C mRNA expression (1.6 × 10-3 ≤ P ≤ 0.050), GMVs of subcortical structures (0.016 ≤ P ≤ 0.048), cortical surface areas (0.010 ≤ P ≤ 0.050), and thickness (0.004 ≤ P ≤ 0.050) in multiple brain regions. CONCLUSION We have identified a novel and functional risk variant block at CACNA1C for schizophrenia, providing further evidence for the important role of this gene in the pathogenesis of schizophrenia.
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Affiliation(s)
- Xiaoyun Guo
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of medicine, Shanghai 200030, China
| | - Shibin Wang
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of medicine, Shanghai 200030, China
| | - Xiandong Lin
- Laboratory of Radiation Oncology and Radiobiology, Fujian Provincial Cancer Hospital, the Teaching Hospital of Fujian Medical University, Fuzhou, Fujian 350014, China
| | - Zuxing Wang
- Sichuan Provincial Center for Mental Health, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu, China
| | - Yikai Dou
- Mental Health Center and Psychiatric Laboratory, the State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, Chengdu, China
- Huaxi Brain Research Center, West China Hospital of Sichuan University, Chengdu, China
| | - Yuping Cao
- Department of Psychiatry, and National Clinical Research Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha 410011, Hunan, China
| | - Yong Zhang
- Tianjin Mental Health Center, Tianjin, China
| | - Xinqun Luo
- Department of Clinical Medicine, College of Integrated Traditional Chinese and Western Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350004, China
| | - Longli Kang
- Key Laboratory for Molecular Genetic Mechanisms and Intervention Research on High Altitude Diseases of Tibet Autonomous Region, Xizang Minzu University School of Medicine, Xiangyang, Shaanxi 712082, China
| | - Ting Yu
- Beijing Huilongguan Hospital, Peking University Huilongguan School of Clinical Medicine, Beijing, China
| | - Zhiren Wang
- Beijing Huilongguan Hospital, Peking University Huilongguan School of Clinical Medicine, Beijing, China
| | - Yunlong Tan
- Beijing Huilongguan Hospital, Peking University Huilongguan School of Clinical Medicine, Beijing, China
| | - Shenshen Gao
- Shanghai Shenkang Hospital Development Center established the Clinical Research and Development Center of Shanghai Municipal Hospitals, Shanghai, China
| | - Hangxiao Zheng
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of medicine, Shanghai 200030, China
| | - Fen Zhao
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of medicine, Shanghai 200030, China
| | - Huifen Wang
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of medicine, Shanghai 200030, China
| | - Kesheng Wang
- Department of Family and Community Health, School of Nursing, Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Fan Xie
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of medicine, Shanghai 200030, China
| | - Wenzhong Chen
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of medicine, Shanghai 200030, China
| | - Xingguang Luo
- Beijing Huilongguan Hospital, Peking University Huilongguan School of Clinical Medicine, Beijing, China
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
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4
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Mao Q, Lin X, Yin Q, Liu P, Zhang Y, Qu S, Xu J, Cheng W, Luo X, Kang L, Taximaimaiti R, Zheng C, Zhang H, Wang X, Ren H, Cao Y, Lin J, Luo X. A significant, functional and replicable risk KTN1 variant block for schizophrenia. Sci Rep 2023; 13:3890. [PMID: 36890161 PMCID: PMC9995530 DOI: 10.1038/s41598-023-27448-z] [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: 10/12/2022] [Accepted: 01/02/2023] [Indexed: 03/10/2023] Open
Abstract
Cortical and subcortical structural alteration has been extensively reported in schizophrenia, including the unusual expansion of gray matter volumes (GMVs) of basal ganglia (BG), especially putamen. Previous genome-wide association studies pinpointed kinectin 1 gene (KTN1) as the most significant gene regulating the GMV of putamen. In this study, the role of KTN1 variants in risk and pathogenesis of schizophrenia was explored. A dense set of SNPs (n = 849) covering entire KTN1 was analyzed in three independent European- or African-American samples (n = 6704) and one mixed European and Asian Psychiatric Genomics Consortium sample (n = 56,418 cases vs. 78,818 controls), to identify replicable SNP-schizophrenia associations. The regulatory effects of schizophrenia-associated variants on the KTN1 mRNA expression in 16 cortical or subcortical regions in two European cohorts (n = 138 and 210, respectively), the total intracranial volume (ICV) in 46 European cohorts (n = 18,713), the GMVs of seven subcortical structures in 50 European cohorts (n = 38,258), and the surface areas (SA) and thickness (TH) of whole cortex and 34 cortical regions in 50 European cohorts (n = 33,992) and eight non-European cohorts (n = 2944) were carefully explored. We found that across entire KTN1, only 26 SNPs within the same block (r2 > 0.85) were associated with schizophrenia across ≥ 2 independent samples (7.5 × 10-5 ≤ p ≤ 0.048). The schizophrenia-risk alleles, which increased significantly risk for schizophrenia in Europeans (q < 0.05), were all minor alleles (f < 0.5), consistently increased (1) the KTN1 mRNA expression in 12 brain regions significantly (5.9 × 10-12 ≤ p ≤ 0.050; q < 0.05), (2) the ICV significantly (6.1 × 10-4 ≤ p ≤ 0.008; q < 0.05), (3) the SA of whole (9.6 × 10-3 ≤ p ≤ 0.047) and two regional cortices potentially (2.5 × 10-3 ≤ p ≤ 0.042; q > 0.05), and (4) the TH of eight regional cortices potentially (0.006 ≤ p ≤ 0.050; q > 0.05), and consistently decreased (1) the BG GMVs significantly (1.8 × 10-19 ≤ p ≤ 0.050; q < 0.05), especially putamen GMV (1.8 × 10-19 ≤ p ≤ 1.0 × 10-4; q < 0.05, (2) the SA of four regional cortices potentially (0.010 ≤ p ≤ 0.048), and (3) the TH of four regional cortices potentially (0.015 ≤ p ≤ 0.049) in Europeans. We concluded that we identified a significant, functional, and robust risk variant block covering entire KTN1 that might play a critical role in the risk and pathogenesis of schizophrenia.
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Affiliation(s)
- Qiao Mao
- Department of Psychosomatic Medicine, People's Hospital of Deyang City, Deyang, 618000, Sichuan, China
| | - Xiandong Lin
- Laboratory of Radiation Oncology and Radiobiology, Fujian Provincial Cancer Hospital, the Teaching Hospital of Fujian Medical University, Fuzhou, 350014, Fujian, China
| | - Qin Yin
- Department of Respiratory and Critical Care Medicine, Hubei Provincial Hospital of Integrated Chinese and Western Medicine, Wuhan, 430000, Hubei, China
| | - Ping Liu
- Department of Psychosomatic Medicine, People's Hospital of Deyang City, Deyang, 618000, Sichuan, China
| | - Yong Zhang
- Tianjin Mental Health Center, Tianjin, 300222, China
| | - Shihao Qu
- Zhuhai Center for Maternal and Child Health Care, Zhuhai, Guangdong, 519001, China
| | - Jianying Xu
- Zhuhai Center for Maternal and Child Health Care, Zhuhai, Guangdong, 519001, China
| | - Wenhong Cheng
- Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Xinqun Luo
- Department of Neurosurgery, The First Hospital, Fujian Medical University, Fuzhou, 350004, Fujian, China
| | - Longli Kang
- Key Laboratory for Molecular Genetic Mechanisms and Intervention Research On High Altitude Diseases of Tibet Autonomous Region, Xizang Minzu University School of Medicine, Xiangyang, 712082, Shaanxi, China
| | - Reyisha Taximaimaiti
- Department of Neurology, Shanghai Tongren Hospital, Shanghai Jiao Tong University, Shanghai, 200080, China
| | - Chengchou Zheng
- Minqing Psychiatric Hospital, Minqing, 350800, Fujian, China
| | - Huihao Zhang
- The First Affiliated Hospital, Fujian Medical University, Fuzhou, 350001, China
| | - Xiaoping Wang
- Department of Neurology, The 1st People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 201620, USA
| | - Honggang Ren
- Department of Internal Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuping Cao
- Department of Psychiatry, Second Xiangya Hospital, Central South University, China National Clinical Research Center On Mental Disorders, China National Technology Institute On Mental Disorders, Changsha, 410011, Hunan, China.
| | - Jie Lin
- Fujian Center for Disease Control and Prevention, Fuzhou, 350012, Fujian, China.
- Fujian Institute of Preventive Medicine, Fuzhou, 350012, Fujian, China.
| | - Xingguang Luo
- Beijing Huilongguan Hospital, Peking University Huilongguan School of Clinical Medicine, Beijing, 100096, China.
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Zhang K, Du X, Liu X, Su W, Sun Z, Wang M, Du X. Gender differences in brain response to infant emotional faces. BMC Neurosci 2022; 23:79. [PMID: 36575370 PMCID: PMC9793562 DOI: 10.1186/s12868-022-00761-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/30/2022] [Indexed: 12/28/2022] Open
Abstract
Infant emotional stimuli can preferentially engage adults' attention and provide valuable information essential for successful interaction between adults and infants. Exploring the neural processes of recognizing infant stimuli promotes better understandings of the mother-infant attachment mechanisms. Here, combining task-functional magnetic resonance imaging (Task-fMRI) and resting-state fMRI (rs-fMRI), we investigated the effects of infants' faces on the brain activity of adults. Two groups including 26 women and 25 men were recruited to participate in the current study. During the task-fMRI, subjects were exposed to images of infant emotional faces (including happy, neutral, and sad) randomly. We found that the brains of women and men reacted differently to infants' faces, and these differential areas are in facial processing, attention, and empathetic networks. The rs-fMRI further showed that the connectivity of the default-mode network-related regions increased in women than in men. Additionally, brain activations in regions related to emotional networks were associated with the empathetic abilities of women. These differences in women might facilitate them to more effective and quick adjustments in behaviors and emotions during the nurturing infant period. The findings provide special implications and insights for understanding the neural processing of reacting to infant cues in adults.
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Affiliation(s)
- Kaihua Zhang
- grid.410585.d0000 0001 0495 1805School of Psychology, Shandong Normal University, Jinan, 250358 Shandong China
| | - Xiaoyu Du
- grid.1008.90000 0001 2179 088XFaculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Victoria, 3010 Australia
| | - Xianling Liu
- grid.411634.50000 0004 0632 4559Department of Medicine Imaging, The People’s Hospital of Jinan Central District, Jinan, 250014 Shandong China
| | - Wei Su
- grid.410585.d0000 0001 0495 1805School of Psychology, Shandong Normal University, Jinan, 250358 Shandong China
| | - Zhenhua Sun
- grid.410747.10000 0004 1763 3680School of Information Science and Engineering, Linyi University, Linyi, 276000 Shandong China
| | - Mengxing Wang
- grid.507037.60000 0004 1764 1277College of Medical Imaging, Shanghai University of Medicine and Health Sciences, Shanghai, 201318 China
| | - Xiaoxia Du
- grid.412543.50000 0001 0033 4148Department of Psychology, Shanghai University of Sport, No.399 Shanghai Road, Yangpu District, Shanghai, 200438 China
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Harrington DL, Shen Q, Wei X, Litvan I, Huang M, Lee RR. Functional topologies of spatial cognition predict cognitive and motor progression in Parkinson’s. Front Aging Neurosci 2022; 14:987225. [PMID: 36299614 PMCID: PMC9589098 DOI: 10.3389/fnagi.2022.987225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 09/12/2022] [Indexed: 11/23/2022] Open
Abstract
Background Spatial cognition deteriorates in Parkinson’s disease (PD), but the neural substrates are not understood, despite the risk for future dementia. It is also unclear whether deteriorating spatial cognition relates to changes in other cognitive domains or contributes to motor dysfunction. Objective This study aimed to identify functional connectivity abnormalities in cognitively normal PD (PDCN) in regions that support spatial cognition to determine their relationship to interfacing cognitive functions and motor disability, and to determine if they predict cognitive and motor progression 2 years later in a PDCN subsample. Methods Sixty-three PDCN and 43 controls underwent functional MRI while judging whether pictures, rotated at various angles, depicted the left or right hand. The task activates systems that respond to increases in rotation angle, a proxy for visuospatial difficulty. Angle-modulated functional connectivity was analyzed for frontal cortex, posterior cortex, and basal ganglia regions. Results Two aberrant connectivity patterns were found in PDCN, which were condensed into principal components that characterized the strength and topology of angle-modulated connectivity. One topology related to a marked failure to amplify frontal, posterior, and basal ganglia connectivity with other brain areas as visuospatial demands increased, unlike the control group (control features). Another topology related to functional reorganization whereby regional connectivity was strengthened with brain areas not recruited by the control group (PDCN features). Functional topologies correlated with diverse cognitive domains at baseline, underscoring their influences on spatial cognition. In PDCN, expression of topologies that were control features predicted greater cognitive progression longitudinally, suggesting inefficient communications within circuitry normally recruited to handle spatial demands. Conversely, stronger expression of topologies that were PDCN features predicted less longitudinal cognitive decline, suggesting functional reorganization was compensatory. Parieto-occipital topologies (control features) had different prognostic implications for longitudinal changes in motor disability. Expression of one topology predicted less motor decline, whereas expression of another predicted increased postural instability and gait disturbance (PIGD) feature severity. Concurrently, greater longitudinal decline in spatial cognition predicted greater motor and PIGD feature progression, suggesting deterioration in shared substrates. Conclusion These novel discoveries elucidate functional mechanisms of visuospatial cognition in PDCN, which foreshadow future cognitive and motor disability.
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Affiliation(s)
- Deborah L. Harrington
- Research Service, VA San Diego Healthcare System, San Diego, CA, United States
- Department of Radiology, University of California, San Diego, La Jolla, CA, United States
- *Correspondence: Deborah L. Harrington,
| | - Qian Shen
- Research Service, VA San Diego Healthcare System, San Diego, CA, United States
- Department of Radiology, University of California, San Diego, La Jolla, CA, United States
| | - Xiangyu Wei
- Research Service, VA San Diego Healthcare System, San Diego, CA, United States
- Revelle College, University of California, San Diego, La Jolla, CA, United States
| | - Irene Litvan
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, United States
| | - Mingxiong Huang
- Department of Radiology, University of California, San Diego, La Jolla, CA, United States
- Radiology Service, VA San Diego Healthcare System, San Diego, CA, United States
| | - Roland R. Lee
- Department of Radiology, University of California, San Diego, La Jolla, CA, United States
- Radiology Service, VA San Diego Healthcare System, San Diego, CA, United States
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Grooms DR, Diekfuss JA, Slutsky-Ganesh AB, Ellis JD, Criss CR, Thomas SM, DiCesare CA, Wong P, Anand M, Lamplot J, Simon JE, Myer GD. Preliminary Report on the Train the Brain Project, Part I: Sensorimotor Neural Correlates of Anterior Cruciate Ligament Injury Risk Biomechanics. J Athl Train 2022; 57:902-910. [PMID: 35271712 PMCID: PMC9842115 DOI: 10.4085/1062-6050-0547.21] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
CONTEXT Anterior cruciate ligament injury commonly occurs via noncontact motor coordination errors that result in excessive multiplanar loading during athletic movements. Preventing motor coordination errors requires neural sensorimotor integration activity to support knee-joint neuromuscular control, but the underlying neural mechanisms driving injury-risk motor control are not well understood. OBJECTIVE To evaluate brain activity differences for knee sensorimotor control between athletes with high or low injury-risk mechanics. DESIGN Case-control study. SETTING Research laboratory. PATIENTS OR OTHER PARTICIPANTS Of 38 female high school soccer players screened, 10 were selected for analysis based on magnetic resonance imaging compliance, injury-risk classification via 3-dimensional biomechanics during a drop vertical jump, and matching criteria to complete neuroimaging during knee motor tasks. MAIN OUTCOME MEASURE(S) Peak knee-abduction moment during landing was used for group allocation into the high (≥21.74 newton meters [Nm], n = 9) or low (≤10.6 Nm, n = 11) injury-risk classification (n = 11 uncategorized, n = 7 who were not compliant with magnetic resonance imaging). Ten participants (5 high risk, 5 low risk) with adequate data were matched and compared across 2 neuroimaging paradigms: unilateral knee-joint control and unilateral multijoint leg press against resistance. RESULTS Athletes with high injury-risk biomechanics had less neural activity in 1 sensory-motor cluster for isolated knee-joint control (precuneus, peak Z score = 4.14, P ≤ .01, 788 voxels) and greater brain activity for the multijoint leg press in 2 cognitive-motor clusters: the frontal cortex (peak Z score = 4.71, P < .01, 1602 voxels) and posterior cingulate gyrus (peak Z score = 4.43, P < .01, 725 voxels) relative to the low injury-risk group. CONCLUSIONS The high injury-risk group's lower relative engagement of neural sensory resources controlling the knee joint may elevate demand on cognitive motor resources to control loaded multijoint action. The neural activity profile in the high injury-risk group may manifest as a breakdown in neuromuscular coordination, resulting in elevated knee-abduction moments during landing.
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Affiliation(s)
- Dustin R. Grooms
- Ohio Musculoskeletal and Neurological Institute, Cincinnati Children's Hospital Medical Center, OH
- Division of Physical Therapy, School of Rehabilitation and Communication Sciences, College of Health Sciences and Professions, Ohio University, Athens
- Division of Athletic Training, School of Applied Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens
| | - Jed A. Diekfuss
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
| | - Alexis B. Slutsky-Ganesh
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
- Division of Musculoskeletal Imaging, Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, GA
| | | | - Cody R. Criss
- Ohio Musculoskeletal and Neurological Institute, Cincinnati Children's Hospital Medical Center, OH
| | | | | | | | - Manish Anand
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
| | - Joseph Lamplot
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
| | - Janet E. Simon
- Ohio Musculoskeletal and Neurological Institute, Cincinnati Children's Hospital Medical Center, OH
- Division of Athletic Training, School of Applied Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens
| | - Gregory D. Myer
- Exponent, Inc, Farmington Hills, MI
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
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Grooms DR, Diekfuss JA, Slutsky-Ganesh AB, DiCesare CA, Bonnette S, Riley MA, Kiefer AW, Wohl TR, Criss CR, Lamplot J, Thomas SM, Foss KDB, Faigenbaum AD, Wong P, Simon JE, Myer GD. Preliminary Report on the Train the Brain Project, Part II: Neuroplasticity of Augmented Neuromuscular Training and Improved Injury-Risk Biomechanics. J Athl Train 2022; 57:911-920. [PMID: 35271709 PMCID: PMC9842124 DOI: 10.4085/1062-6050-0548.21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
CONTEXT Neuromuscular training (NMT) facilitates the acquisition of new movement patterns that reduce the anterior cruciate ligament injury risk. However, the neural mechanisms underlying these changes are unknown. OBJECTIVE To determine the relationship between brain activation and biomechanical changes after NMT with biofeedback. DESIGN Cohort study. SETTING Research laboratory. PATIENTS OR OTHER PARTICIPANTS Twenty female high school soccer athletes, with 10 in an augmented NMT group and 10 in a control (no training) group. MAIN OUTCOME MEASURE(S) Ten participants completed 6 weeks of NMT augmented with real-time biofeedback to reduce knee injury-risk movements, and 10 participants pursued no training. Augmented neuromuscular training (aNMT) was implemented with visual biofeedback that responded in real time to injury-risk biomechanical variables. A drop vertical jump with 3-dimensional motion capture was used to assess injury-risk neuromuscular changes before and after the 6-week intervention. Brain-activation changes were measured using functional magnetic resonance imaging during unilateral knee and multijoint motor tasks. RESULTS After aNMT, sensory (precuneus), visual-spatial (lingual gyrus), and motor-planning (premotor) brain activity increased for knee-specific movement; sensorimotor cortex activity for multijoint movement decreased. The knee-abduction moment during landing also decreased (4.66 ± 5.45 newton meters; P = .02; Hedges g = 0.82) in the aNMT group but did not change in the control group (P > .05). The training-induced increased brain activity with isolated knee movement was associated with decreases in knee-abduction moment (r = 0.67; P = .036) and sensorimotor cortex activity for multijoint movement (r = 0.87; P = .001). No change in brain activity was observed in the control group (P > .05). CONCLUSIONS The relationship between neural changes observed across tasks and reduced knee abduction suggests that aNMT facilitated recruitment of sensory integration centers to support reduced injury-risk mechanics and improve sensorimotor neural efficiency for multijoint control. Further research is warranted to determine if this training-related multimodal neuroplasticity enhances neuromuscular control during more complex sport-specific activities.
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Affiliation(s)
- Dustin R. Grooms
- Ohio Musculoskeletal and Neurological Institute, Waltham, MA
- Division of Physical Therapy, School of Rehabilitation and Communication Sciences, College of Health Sciences and Professions, Ohio University, Athens
- Division of Athletic Training, School of Applied Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens
| | - Jed A. Diekfuss
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
| | - Alexis B. Slutsky-Ganesh
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
- Department of Kinesiology, University of North Carolina Greensboro
| | | | - Scott Bonnette
- Division of Sports Medicine, Cincinnati Children's Hospital Medical Center, OH
| | - Michael A. Riley
- Department of Rehabilitation, Exercise, and Nutrition Sciences, University of Cincinnati, OH
| | - Adam W. Kiefer
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill
| | - Timothy R. Wohl
- Ohio Musculoskeletal and Neurological Institute, Waltham, MA
| | - Cody R. Criss
- Ohio Musculoskeletal and Neurological Institute, Waltham, MA
| | - Joseph Lamplot
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
| | - Staci M. Thomas
- Division of Sports Medicine, Cincinnati Children's Hospital Medical Center, OH
| | - Kim D. Barber Foss
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
| | | | - Phil Wong
- Department of Diagnostic Radiology and Imaging Sciences, Division of Musculoskeletal Imaging, Emory University School of Medicine, Atlanta, GA
| | - Janet E. Simon
- Ohio Musculoskeletal and Neurological Institute, Waltham, MA
- Division of Athletic Training, School of Applied Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Athens
| | - Gregory D. Myer
- Emory Sports Performance And Research Center (SPARC), Flowery Branch, GA
- Emory Sports Medicine Center, Atlanta, GA
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, GA
- The Micheli Center for Sports Injury Prevention, Waltham, MA
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9
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Weng Y, Lin J, Ahorsu DK, Tsang HWH. Neuropathways of theory of mind in schizophrenia: A systematic review and meta-analysis. Neurosci Biobehav Rev 2022; 137:104625. [PMID: 35339482 DOI: 10.1016/j.neubiorev.2022.104625] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 03/11/2022] [Accepted: 03/14/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND Social cognition is significantly associated with daily functioning in patients with schizophrenia. Its neural basis remains unknown. METHODS A systematic literature search was performed. Studies using imaging to measure theory of mind (ToM) in schizophrenia were identified. Imaging data were synthesized using the seed-based d mapping approach. Potential neuropathways were hypothesized based on the identified brain regions activated during ToM tasks. RESULTS A total of 25 studies were included in the present study. Compared with healthy people, patients with schizophrenia showed hyperactivations in superior longitudinal fasciculus II and hypoactivations in superior frontal gyrus, precuneus and cuneus, and precentral gyrus during ToM tasks. The primary brain regions involved in the potential neuropathways in schizophrenia were the middle temporal gyrus, superior and inferior frontal gyrus, and supplementary motor areas. CONCLUSION Deactivated brain regions in schizophrenia overlapped with the default mode and salience networks. Our findings shed light on how to develop a diagnostic tool for deficits in social cognition using neuroimaging techniques and effective therapeutic interventions to rectify dysfunction in schizophrenia.
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Affiliation(s)
- Yiting Weng
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, People's Republic of China
| | - Jingxia Lin
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, People's Republic of China; Mental Health Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon, People's Republic of China
| | - Daniel Kwasi Ahorsu
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, People's Republic of China
| | - Hector W H Tsang
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, People's Republic of China; Mental Health Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon, People's Republic of China.
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10
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Disrupting Short-Term Memory Maintenance in Premotor Cortex Affects Serial Dependence in Visuomotor Integration. J Neurosci 2021; 41:9392-9402. [PMID: 34607968 DOI: 10.1523/jneurosci.0380-21.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 09/13/2021] [Accepted: 09/19/2021] [Indexed: 11/21/2022] Open
Abstract
Human behavior is biased by past experience. For example, when intercepting a moving target, the speed of previous targets will bias responses in future trials. Neural mechanisms underlying this so-called serial dependence are still under debate. Here, we tested the hypothesis that the previous trial leaves a neural trace in brain regions associated with encoding task-relevant information in visual and/or motor regions. We reasoned that injecting noise by means of transcranial magnetic stimulation (TMS) over premotor and visual areas would degrade such memory traces and hence reduce serial dependence. To test this hypothesis, we applied bursts of TMS pulses to right visual motion processing region hV5/MT+ and to left dorsal premotor cortex (PMd) during intertrial intervals of a coincident timing task performed by twenty healthy human participants (15 female). Without TMS, participants presented a bias toward the speed of the previous trial when intercepting moving targets. TMS over PMd decreased serial dependence in comparison to the control Vertex stimulation, whereas TMS applied over hV5/MT+ did not. In addition, TMS seems to have specifically affected the memory trace that leads to serial dependence, as we found no evidence that participants' behavior worsened after applying TMS. These results provide causal evidence that an implicit short-term memory mechanism in premotor cortex keeps information from one trial to the next, and that this information is blended with current trial information so that it biases behavior in a visuomotor integration task with moving objects.SIGNIFICANCE STATEMENT Human perception and action are biased by the recent past. The origin of such serial bias is still not fully understood, but a few components seem to be fundamental for its emergence: the brain needs to keep previous trial information in short-term memory and blend it with incoming information. Here, we present evidence that a premotor area has a potential role in storing previous trial information in short-term memory in a visuomotor task and that this information is responsible for biasing ongoing behavior. These results corroborate the perspective that areas associated with processing information of a stimulus or task also participate in maintaining that information in short-term memory even when this information is no longer relevant for current behavior.
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11
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White matter microarchitecture and structural network integrity correlate with children intelligence quotient. Sci Rep 2020; 10:20722. [PMID: 33244043 PMCID: PMC7691327 DOI: 10.1038/s41598-020-76528-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 10/26/2020] [Indexed: 11/17/2022] Open
Abstract
The neural substrate of high intelligence performances remains not well understood. Based on diffusion tensor imaging (DTI) which provides microstructural information of white matter fibers, we proposed in this work to investigate the relationship between structural brain connectivity and intelligence quotient (IQ) scores. Fifty-seven children (8–12 y.o.) underwent a MRI examination, including conventional T1-weighted and DTI sequences, and neuropsychological testing using the fourth edition of Wechsler Intelligence Scale for Children (WISC-IV), providing an estimation of the Full-Scale Intelligence Quotient (FSIQ) based on four subscales: verbal comprehension index (VCI), perceptual reasoning index (PRI), working memory index (WMI), and processing speed index (PSI). Correlations between the IQ scores and both graphs and diffusivity metrics were explored. First, we found significant correlations between the increased integrity of WM fiber-bundles and high intelligence scores. Second, the graph theory analysis showed that integration and segregation graph metrics were positively and negatively correlated with WISC-IV scores, respectively. These results were mainly driven by significant correlations between FSIQ, VCI, and PRI and graph metrics in the temporal and parietal lobes. In conclusion, these findings demonstrated that intelligence performances are related to the integrity of WM fiber-bundles as well as the density and homogeneity of WM brain networks.
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12
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Srivastava A, Sharma R, Goyal V, Chaudhary S, Sood SK, Kumaran SS. Saccadic Eye Movements in Young-Onset Parkinson's Disease - A BOLD fMRI Study. Neuroophthalmology 2020; 44:89-99. [PMID: 32395155 DOI: 10.1080/01658107.2019.1652656] [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: 05/22/2019] [Revised: 07/19/2019] [Accepted: 08/02/2019] [Indexed: 10/25/2022] Open
Abstract
The objective of the present study was to understand control of saccadic eye movements in patients with young onset Parkinson's disease (YOPD) where onset of disease symptoms appears early in life (<40 years of age). Functional magnetic resonance imaging (fMRI) was performed in patients with YOPD and control subjects while they performed saccadic tasks, which consisted of a reflexive task and another task that required inhibitory control of eye movements (Go-NoGo task). Functional imaging related to saccadic eye movements in this group of patients has not been widely reported. A 1.5T MR scanner was used for structural and functional imaging. Analysis of blood-oxygen-level-dependent (BOLD) fMRI was performed using Statistical Parametric Mapping (SPM) software and compared in patients and controls. In patients with YOPD greater activation was seen significantly in the middle frontal gyrus, medial frontal gyrus, angular gyrus, cingulate gyrus, precuneus and cerebellum, when compared with the control group, during the saccadic tasks. Gap and overlap protocols revealed differential activation patterns. The abnormal activation during reflexive saccades was observed in the overlap condition, while during Go-NoGo saccades in the gap condition. The results suggest that impaired circuitry in patients with YOPD results in recruitment of more cortical areas. This increased frontal and parietal cortical activity possibly reflects compensatory mechanisms for impaired cognitive and saccadic circuitry.
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Affiliation(s)
- Anshul Srivastava
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
| | - Ratna Sharma
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
| | - Vinay Goyal
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Shefali Chaudhary
- Department of NMR, All India Institute of Medical Sciences, New Delhi, India
| | | | - S Senthil Kumaran
- Department of NMR, All India Institute of Medical Sciences, New Delhi, India
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13
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Helmchen C, Machner B, Rother M, Spliethoff P, Göttlich M, Sprenger A. Effects of galvanic vestibular stimulation on resting state brain activity in patients with bilateral vestibulopathy. Hum Brain Mapp 2020; 41:2527-2547. [PMID: 32103579 PMCID: PMC7267973 DOI: 10.1002/hbm.24963] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 02/03/2020] [Accepted: 02/11/2020] [Indexed: 01/04/2023] Open
Abstract
We examined the effect of galvanic vestibular stimulation (GVS) on resting state brain activity using fMRI (rs‐fMRI) in patients with bilateral vestibulopathy. Based on our previous findings, we hypothesized that GVS, which excites the vestibular nerve fibers, (a) increases functional connectivity in temporoparietal regions processing vestibular signals, and (b) alleviates abnormal visual–vestibular interaction. Rs‐fMRI of 26 patients and 26 age‐matched healthy control subjects was compared before and after GVS. The stimulation elicited a motion percept in all participants. Using different analyses (degree centrality, DC; fractional amplitude of low frequency fluctuations [fALFF] and seed‐based functional connectivity, FC), group comparisons revealed smaller rs‐fMRI in the right Rolandic operculum of patients. After GVS, rs‐fMRI increased in the right Rolandic operculum in both groups and in the patients' cerebellar Crus 1 which was related to vestibular hypofunction. GVS elicited a fALFF increase in the visual cortex of patients that was inversely correlated with the patients' rating of perceived dizziness. After GVS, FC between parietoinsular cortex and higher visual areas increased in healthy controls but not in patients. In conclusion, short‐term GVS is able to modulate rs‐fMRI in healthy controls and BV patients. GVS elicits an increase of the reduced rs‐fMRI in the patients' right Rolandic operculum, which may be an important contribution to restore the disturbed visual–vestibular interaction. The GVS‐induced changes in the cerebellum and the visual cortex were associated with lower dizziness‐related handicaps in patients, possibly reflecting beneficial neural plasticity that might subserve visual–vestibular compensation of deficient self‐motion perception.
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Affiliation(s)
- Christoph Helmchen
- Department of Neurology, University Hospitals Schleswig-Holstein, Lübeck, Germany
| | - Björn Machner
- Department of Neurology, University Hospitals Schleswig-Holstein, Lübeck, Germany
| | - Matthias Rother
- Department of Neurology, University Hospitals Schleswig-Holstein, Lübeck, Germany
| | - Peer Spliethoff
- Department of Neurology, University Hospitals Schleswig-Holstein, Lübeck, Germany
| | - Martin Göttlich
- Department of Neurology, University Hospitals Schleswig-Holstein, Lübeck, Germany
| | - Andreas Sprenger
- Department of Neurology, University Hospitals Schleswig-Holstein, Lübeck, Germany.,Institute of Psychology II, University of Lübeck, Lübeck, Germany
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14
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Lou Y, Zhao L, Yu S, Sun B, Hou Z, Zhang Z, Tang Y, Liu S. Brain asymmetry differences between Chinese and Caucasian populations: a surface-based morphometric comparison study. Brain Imaging Behav 2019; 14:2323-2332. [PMID: 31435899 DOI: 10.1007/s11682-019-00184-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Asymmetry has been proved to exist in the human brain structure, function and behavior. Most of the existing brain asymmetry findings are originated from the western populations, while studies about the brain structural and functional asymmetries in East Asians are limited. Extensive evidence suggested that cultural differences, e.g. education and language, may lead to differences in brain structure and function between races. Therefore, we hypothesized that differences in brain structural asymmetries exist between East Asians and Westerners. In this study, we performed a comprehensive surface-based morphometric (SBM) analysis of brain asymmetries in cortical thickness, volume and surface area in two well-matched groups of right-handed, Chinese (n = 45) and Caucasian (n = 45) young male adults (age = 22-29 years). Our results showed consistent inter-hemispheric asymmetries in the three brain morphological measures in multiple brain regions in the Chinese young adults, including the temporal, frontal, parietal, occipital, insular cortices and the cingulate gyrus. Comparing with the Caucasians, the Chinese group showed greater structural asymmetry in the frontal, temporal, occipital and insular cortices, and smaller asymmetry in the parietal cortex and cingulate gyrus. These findings could provide a new neuroanatomical basis for understanding the distinctions between East Asian and Caucasian in brain functional lateralization.
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Affiliation(s)
- Yunxia Lou
- Research Center for Sectional and Imaging Anatomy, Shandong University Cheeloo College of Medicine, Jinan, China.,School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Lu Zhao
- Laboratory of Neuro Imaging (LONI), Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USC, Los Angeles, CA, USA
| | - Shui Yu
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, China
| | - Bo Sun
- Research Center for Sectional and Imaging Anatomy, Shandong University Cheeloo College of Medicine, Jinan, China.,Shandong Medical Imaging Research Institute, Jinan, China
| | - Zhongyu Hou
- Research Center for Sectional and Imaging Anatomy, Shandong University Cheeloo College of Medicine, Jinan, China.,Department of Medical Imaging, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Zhonghe Zhang
- Research Center for Sectional and Imaging Anatomy, Shandong University Cheeloo College of Medicine, Jinan, China.,Department of Medical Imaging, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Yuchun Tang
- Research Center for Sectional and Imaging Anatomy, Shandong University Cheeloo College of Medicine, Jinan, China. .,School of Basic Medical Sciences, Shandong University, Jinan, China.
| | - Shuwei Liu
- Research Center for Sectional and Imaging Anatomy, Shandong University Cheeloo College of Medicine, Jinan, China.,School of Basic Medical Sciences, Shandong University, Jinan, China
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15
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Neural underpinnings of numerical and spatial cognition: An fMRI meta-analysis of brain regions associated with symbolic number, arithmetic, and mental rotation. Neurosci Biobehav Rev 2019; 103:316-336. [DOI: 10.1016/j.neubiorev.2019.05.007] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 05/03/2019] [Accepted: 05/09/2019] [Indexed: 11/20/2022]
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16
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Suran T, Rumiati RI, Piretti L. The contribution of the left inferior frontal gyrus in affective processing of social groups. Cogn Neurosci 2019; 10:186-195. [PMID: 30913979 DOI: 10.1080/17588928.2019.1593127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We investigated the contribution of the pars opercularis of the left inferior frontal gyrus (LIFGop) in representing knowledge about social groups. We asked healthy individuals to categorize words preceded by semantically congruent or incongruent primes while stimulating the LIFGop. Previous studies showing an involvement of the LIFGop both in processing social stimuli and negative valence words led us to predict that its stimulation would affect responses to negative social category words. Compared to the Vertex as control site, the stimulation of the LIFGop increased the speed of categorization of negative social groups, and disrupted the semantic priming effect for negative words overall. Within the framework of recent theories of semantic memory, we argue that the present results provide initial evidence of the representation of social groups being characterized by affective properties, whose processing is supported by the LIFGop.
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Affiliation(s)
| | | | - Luca Piretti
- a Area of Neuroscience, SISSA , Trieste , Italy.,c Department of Psychology and Cognitive Sciences, University of Trento , Rovereto , Italy.,d Fondazione ONLUS Marica De Vincenzi , Rovereto , Italy
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17
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Abnormal intrinsic functional network hubs and connectivity following peripheral visual loss because of inherited retinal degeneration. Neuroreport 2019; 30:295-304. [DOI: 10.1097/wnr.0000000000001200] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Potok W, Maskiewicz A, Króliczak G, Marangon M. The temporal involvement of the left supramarginal gyrus in planning functional grasps: A neuronavigated TMS study. Cortex 2019; 111:16-34. [DOI: 10.1016/j.cortex.2018.10.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/04/2018] [Accepted: 10/02/2018] [Indexed: 01/01/2023]
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19
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Zhu F, Tang L, Zhu P, Lin Q, Yuan Q, Shi W, Li B, Ye L, Min Y, Su T, Shao Y. Resting-state functional magnetic resonance imaging (fMRI) and functional connectivity density mapping in patients with corneal ulcer. Neuropsychiatr Dis Treat 2019; 15:1833-1844. [PMID: 31308676 PMCID: PMC6617566 DOI: 10.2147/ndt.s210658] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 06/10/2019] [Indexed: 12/13/2022] Open
Abstract
PURPOSE To investigate alternations in spontaneous brain activities reflected by functional connectivity density (FCD) in patients with corneal ulcer (CU) using resting-state functional connectivity (rsFC). METHODS We recruited 24 patients with CU (12 males, 12 females), and 24 healthy controls (HCs; 12 males, 12 females) matched for age, gender and education status. Functional magnetic resonance imaging examinations were performed on all subjects in a resting state and the following parameters determined: rsFC, long-range FCD (longFCD) and short-range FCD (IFCD). Receiver operating characteristic (ROC) curves were then used to differentiate patients with CU from HCs. RESULTS Compared with HCs, CU patients showed significantly reduced rsFC values in the right cerebellum posterior lobe gyrus, right middle frontal gyrus/inferior frontal gyrus/superior frontal gyrus and left inferior parietal lobule/precuneus. Significantly reduced longFCD values were found in the right hippocampus/inferior temporal gyrus and the left inferior temporal gyrus. Moreover, compared with HCs, IFCD values were significantly reduced in the left inferior temporal gyrus/middle temporal gyrus, left limbic lobe/medial frontal gyrus, and left precuneus/limbic lobe, but were significantly increased in the right insula/superior temporal gyrus, left superior temporal gyrus/inferior frontal gyrus/insula, right superior temporal gyrus/postcentral gyrus, and left precentral gyrus. CONCLUSIONS Patients with CU exhibited alterations in spontaneous brain activities in several brain areas. These novel findings may help to reveal the neuropathological mechanisms underlying CU. UNLABELLED This study provides a direction for further exploration of underlying neural mechanisms of CU and facilitate the clinical diagnosis and treatment of CU.
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Affiliation(s)
- Feiyin Zhu
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China.,Department of Clinical Medicine, Queen Mary College of Nanchang University, Nanchang, Jiangxi 330031, People's Republic of China
| | - Liying Tang
- Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, Fujian 361102, People's Republic of China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science , Xiamen, Fujian 361102, People's Republic of China.,Eye Institute of Xiamen University , Xiamen, Fujian 361102, People's Republic of China.,School of Medicine, Xiamen University , Xiamen, Fujian 361102, People's Republic of China
| | - Peiwen Zhu
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
| | - Qi Lin
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
| | - Qing Yuan
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
| | - Wenqing Shi
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
| | - Biao Li
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
| | - Lei Ye
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
| | - Youlan Min
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
| | - Ting Su
- Department of Ophthalmology, Xiang'an Hospital of Xiamen University, Xiamen, Fujian 361102, People's Republic of China.,Fujian Provincial Key Laboratory of Ophthalmology and Visual Science , Xiamen, Fujian 361102, People's Republic of China.,Eye Institute of Xiamen University , Xiamen, Fujian 361102, People's Republic of China.,School of Medicine, Xiamen University , Xiamen, Fujian 361102, People's Republic of China
| | - Yi Shao
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, People's Republic of China
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20
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Kocevar G, Suprano I, Stamile C, Hannoun S, Fourneret P, Revol O, Nusbaum F, Sappey-Marinier D. Brain structural connectivity correlates with fluid intelligence in children: A DTI graph analysis. INTELLIGENCE 2019. [DOI: 10.1016/j.intell.2018.12.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Neuroergonomics of car driving: A critical meta-analysis of neuroimaging data on the human brain behind the wheel. Neurosci Biobehav Rev 2018; 95:464-479. [PMID: 30442593 DOI: 10.1016/j.neubiorev.2018.10.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 07/26/2018] [Accepted: 10/23/2018] [Indexed: 12/16/2022]
Abstract
Car driving, an everyday life activity, has been under the scope of investigation for long. Neurosciences and psychology have contributed to better understand the human processes engaged while driving, to such an extent that a meta-analysis of all available fMRI data is now possible to extract the most relevant information. Using the Activation Likelihood Estimation method, we therefore conducted such a meta-analysis on 9 studies, representing 27 neuroimaging contrasts and 131 participants. We identified a network composed of brain areas underlying the cognitive abilities required for driving: sensorimotor coordination, sensory and attentional processing, high-level cognitive control and allocation of attentional resources. We complemented this meta-analysis with a neuroergonomics approach combining driving control knowledge, distinguishing the strategical, tactical and operational levels, with neuroscientific knowledge and models on cognitive control operated by the prefrontal cortex. The results exposed the distinct neural circuits engaged behind the wheel depending on the task performed. Based on the combination of neuroscientific and ergonomic knowledge, a hybrid car driving framework is also proposed.
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Holmes NP, Meteyard L. Subjective Discomfort of TMS Predicts Reaction Times Differences in Published Studies. Front Psychol 2018; 9:1989. [PMID: 30405482 PMCID: PMC6200894 DOI: 10.3389/fpsyg.2018.01989] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 09/27/2018] [Indexed: 12/01/2022] Open
Affiliation(s)
| | - Lotte Meteyard
- School of Psychology and Clinical Language Sciences, University of Reading, Reading, United Kingdom
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Kiortsis DN, Spyridonos P, Margariti PN, Xydis V, Alexiou G, Astrakas LG, Argyropoulou MI. Brain activation during repeated imagining of chocolate consumption: a functional magnetic resonance imaging study. Hormones (Athens) 2018; 17:367-371. [PMID: 30105568 DOI: 10.1007/s42000-018-0053-1] [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: 07/23/2018] [Accepted: 07/31/2018] [Indexed: 10/28/2022]
Abstract
OBJECTIVE To assess brain activation during mental visualization of eating chocolate. DESIGN Twenty-one subjects were included. FMRI was acquired with a single-shot, multislice, gradient echo-planar sequence, while subjects were performing two specific imaginary tasks. RESULTS Activation of motor-associated brain areas was observed during both mental visualization tasks. Increased activation of the right dorsolateral prefrontal cortex, the thalamus, the postcentral gyrus and the left anterior cingulate cortex, and the precuneus was observed during imagining eating chocolate. CONCLUSIONS Repeated imagination of chocolate consumption results in activation of brain areas associated with hedonic effects of food and satiety and inhibition of orexigenic areas.
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Affiliation(s)
- Dimitrios N Kiortsis
- Department of Nuclear Medicine, Medical School, University of Ioannina, Ioannina, Greece
| | - Panagiota Spyridonos
- Department of Medical Physics, Medical School, University of Ioannina, Ioannina, Greece
| | | | - Vassileios Xydis
- Department of Radiology, Medical School, University of Ioannina, Ioannina, Greece
| | - George Alexiou
- Department of Neurosurgery, Medical School, University of Ioannina, PO BOX 103, Neohoropoulo, 45500, Ioannina, Greece.
| | - Loukas G Astrakas
- Department of Medical Physics, Medical School, University of Ioannina, Ioannina, Greece
| | - Maria I Argyropoulou
- Department of Radiology, Medical School, University of Ioannina, Ioannina, Greece
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Shokouhi M, Clarke C, Morley-Forster P, Moulin DE, Davis KD, St. Lawrence K. Structural and Functional Brain Changes at Early and Late Stages of Complex Regional Pain Syndrome. THE JOURNAL OF PAIN 2018; 19:146-157. [DOI: 10.1016/j.jpain.2017.09.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 09/12/2017] [Accepted: 09/30/2017] [Indexed: 01/21/2023]
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Wang H, Chen T, Ye L, Yang QC, Wei R, Zhang Y, Jiang N, Shao Y. Network centrality in patients with acute unilateral open globe injury: A voxel‑wise degree centrality study. Mol Med Rep 2017; 16:8295-8300. [PMID: 28983610 DOI: 10.3892/mmr.2017.7635] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 08/01/2017] [Indexed: 11/06/2022] Open
Abstract
The present study aimed to investigate functional networks underlying brain‑activity alterations in patients with acute unilateral open globe injury (OGI) and associations with their clinical features using the voxel‑wise degree centrality (DC) method. In total, 18 patients with acute OGI (16 males and 2 females), and 18 healthy subjects (16 males and 2 females), closely matched in age, sex and education, participated in the present study. Each subject underwent a resting‑state functional magnetic resonance imaging scan. The DC method was used to assess local features of spontaneous brain activity. Receiver operating characteristic curve analysis was used to distinguish OGIs from healthy controls (HCs). Correlation analysis was used to examine the association between the observed mean DC values of different brain areas and behavioral performance. Compared with HCs, patients with acute unilateral OGI had significantly increased DC values in the bilateral primary visual cortex (V1/V2) and left precuneus (PCUN), and significantly decreased DC values in the right insula, left insula, right inferior parietal lobule (IPL)/supramarginal gyrus (SMG), IPL/SMG, right supplementary motor area and right postcentral gyrus. Additionally, in the acute OGI group, it was observed that the duration of OGI was negatively correlated with the DC signal value of the bilateral V1/V2 (r=‑0.581; P=0.011) and left PCUN (r=‑0.508; P=0.031). Acute OGI led to brain functional network dysfunction in a number of brain regions, which may indicate impairment of the visual cortex and other vision‑associated brain regions in OGI.
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Affiliation(s)
- Hua Wang
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Ting Chen
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Lei Ye
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Qi-Chen Yang
- Eye Institute of Xiamen University, Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen, Fujian 361102, P.R. China
| | - Rong Wei
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Ying Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Nan Jiang
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Yi Shao
- Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
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26
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Ouyang J, Yang L, Huang X, Zhong YL, Hu PH, Zhang Y, Pei CG, Shao Y. The atrophy of white and gray matter volume in patients with comitant strabismus: Evidence from a voxel-based morphometry study. Mol Med Rep 2017; 16:3276-3282. [PMID: 28713925 PMCID: PMC5547961 DOI: 10.3892/mmr.2017.7006] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 05/11/2017] [Indexed: 01/25/2023] Open
Abstract
To compare the difference in white matter volume (WMV) and gray matter volume (GMV) between the comitant strabismus (CS) patients and health controls by voxel-based morphometry (VBM) and the relationship with behavioral performance. A total of 20 patients with comitant strabismus (10 males and 10 females), and 20 healthy subjects (10 males and 10 females) with matched age, sex status underwent magnetic resonance examination. The authors analyzed the original 3D T1 brain images using the VBM module. The comitant strabismus groups were compared with the control groups for the GMW and WMV of the entire brain. Correlation analysis was performed to investigate the relationship between the GMV and WMV altered areas and the behavioral performance in comitant strabismus. CS patients were distinguishable from the healthy controls (HCs) by receiver operating characteristic curves. Results of the VBM analysis demonstrated that the CS groups had decreased GMV in the brain regions of the left middle temporal pole, left cerebellum posterior lobe, right posterior cingulate cortex, left cuneus and right premotor cortex. Meanwhile, the WMV was significantly decreased in the brain regions of the left middle temporal gyrus, right middle temporal gyrus, left middle temporal gyrus, right precuneus and right premotor cortex in the comitant strabismus patients compared with HCs. Furthermore, the duration of CS was negatively correlated with the GMV values of the left middle temporal pole (r=-0.486, P=0.030). CS caused GMV and WMV atrophy in many brain regions, which may indicate the neural mechanisms of the ocular motility disorders in CS patients.
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Affiliation(s)
- Jun Ouyang
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Lu Yang
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Xin Huang
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Yu-Lin Zhong
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Pei-Hong Hu
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Ying Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Chong-Gang Pei
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
| | - Yi Shao
- Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute and Oculopathy Research Centre, Nanchang, Jiangxi 330006, P.R. China
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The role of dorsal premotor cortex in mental rotation: A transcranial magnetic stimulation study. Brain Cogn 2017; 116:71-78. [PMID: 28606388 DOI: 10.1016/j.bandc.2017.06.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 04/26/2017] [Accepted: 06/06/2017] [Indexed: 11/24/2022]
Abstract
Although activation of dorsal premotor cortex (PMd) has been consistently observed in the neuroimaging studies of mental rotation, the functional meaning of PMd activation is still unclear and multiple alternative explanations have been suggested. The present study used repetitive transcranial magnetic stimulation (rTMS) to investigate the role of PMd in mental rotation. Two tasks were used, involving mental rotation of hands and abstract objects, with either matching (same stimuli) or mirror stimuli. Compared to sham stimulation, TMS over right and left PMd regions significantly affected accuracy in the object task, specifically for the same stimuli. Furthermore, response times were longer following right PMd stimulation in both the object and the hand tasks, but again, selectively for the same stimuli. The effect of rotational angle on response times and accuracies was greater for the same stimuli. Moreover TMS over PMd impaired the performance accuracy selectively in these stimuli, mainly in a task that included abstract objects. For these reasons, the present findings indicate a contribution of PMd to mental rotation.
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28
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Hashiguchi R, Otsubo K, Maesato M, Sugimoto K, Fujiwara A, Kitagawa H. Mixed-Valence Nickel Bis(azamacrocycle) Compounds with Ghost-Leg-type Sheets. Angew Chem Int Ed Engl 2017; 56:3838-3841. [PMID: 28000324 DOI: 10.1002/anie.201610515] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/28/2016] [Indexed: 01/30/2023]
Abstract
The fabrication of so-called ghost-leg sheets and their electronic properties is reported. This unique sheet structure is composed of one-dimensional mixed-valence nickel chains, which are linked with one another by bis(azamacrocycle) ligands. They are also topologically unique NiII /NiIII mixed-valence complexes, as confirmed by X-ray and optical measurements. Moreover, their magnetic susceptibilities indicated two-dimensional antiferromagnetic behavior following the Fisher 1D chain model with interchain interactions, where spins on NiIII sites mutually interact antiferromagnetically in the sheets.
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Affiliation(s)
- Ryota Hashiguchi
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Kazuya Otsubo
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Mitsuhiko Maesato
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Kunihisa Sugimoto
- Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Akihiko Fujiwara
- Department of Nanotechnology for Sustainable Energy, Graduate School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan.,INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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29
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Vividness of Visual Imagery Depends on the Neural Overlap with Perception in Visual Areas. J Neurosci 2017; 37:1367-1373. [PMID: 28073940 DOI: 10.1523/jneurosci.3022-16.2016] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/20/2016] [Accepted: 12/29/2016] [Indexed: 11/21/2022] Open
Abstract
Research into the neural correlates of individual differences in imagery vividness point to an important role of the early visual cortex. However, there is also great fluctuation of vividness within individuals, such that only looking at differences between people necessarily obscures the picture. In this study, we show that variation in moment-to-moment experienced vividness of visual imagery, within human subjects, depends on the activity of a large network of brain areas, including frontal, parietal, and visual areas. Furthermore, using a novel multivariate analysis technique, we show that the neural overlap between imagery and perception in the entire visual system correlates with experienced imagery vividness. This shows that the neural basis of imagery vividness is much more complicated than studies of individual differences seemed to suggest. SIGNIFICANCE STATEMENT Visual imagery is the ability to visualize objects that are not in our direct line of sight: something that is important for memory, spatial reasoning, and many other tasks. It is known that the better people are at visual imagery, the better they can perform these tasks. However, the neural correlates of moment-to-moment variation in visual imagery remain unclear. In this study, we show that the more the neural response during imagery is similar to the neural response during perception, the more vivid or perception-like the imagery experience is.
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30
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Hashiguchi R, Otsubo K, Maesato M, Sugimoto K, Fujiwara A, Kitagawa H. Mixed-Valence Nickel Bis(azamacrocycle) Compounds with Ghost-Leg-type Sheets. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ryota Hashiguchi
- Division of Chemistry; Graduate School of Science; Kyoto University; Kitashirakawa-Oiwakecho, Sakyo-ku Kyoto 606-8502 Japan
| | - Kazuya Otsubo
- Division of Chemistry; Graduate School of Science; Kyoto University; Kitashirakawa-Oiwakecho, Sakyo-ku Kyoto 606-8502 Japan
| | - Mitsuhiko Maesato
- Division of Chemistry; Graduate School of Science; Kyoto University; Kitashirakawa-Oiwakecho, Sakyo-ku Kyoto 606-8502 Japan
| | - Kunihisa Sugimoto
- Japan Synchrotron Radiation Research Institute (JASRI); SPring-8, 1-1-1 Kouto Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Akihiko Fujiwara
- Department of Nanotechnology for Sustainable Energy; Graduate School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hiroshi Kitagawa
- Division of Chemistry; Graduate School of Science; Kyoto University; Kitashirakawa-Oiwakecho, Sakyo-ku Kyoto 606-8502 Japan
- INAMORI Frontier Research Center; Kyushu University; 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- Institute for Integrated Cell-Material Sciences (iCeMS); Kyoto University; Yoshida, Sakyo-ku Kyoto 606-8501 Japan
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31
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Ranjbar Pouya O, Byagowi A, Kelly DM, Moussavi Z. Introducing a new age-and-cognition-sensitive measurement for assessing spatial orientation using a landmark-less virtual reality navigational task. Q J Exp Psychol (Hove) 2016; 70:1406-1419. [PMID: 27156658 DOI: 10.1080/17470218.2016.1187181] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Age-related impairments during spatial navigation have been widely reported in egocentric and allocentric paradigms. However, the effect of age on more specific navigational components such as the ability to drive or update directional information has not received enough attention. In this study we investigated the effect of age on spatial updating of a visual target after a series of whole-body rotations and transitions using a novel landmark-less virtual reality (VR) environment. Moreover, a significant number of previous studies focused on measures susceptible to a general decline in motor skills such as the spent time navigating, the distance traversed. The current paper proposes a new compound spatial measure to assess navigational performance, examines its reliability and compares its power with those of the measures of duration and traversed distance in predicting participants' age and cognitive groups assessed by Montreal Cognitive Assessment (MoCA) scores. Using data from 319 adults (20-83 years), our results confirm the reliability, the age sensitivity, and the cognitive validity of the designed spatial measure as well as its superiority to the measures of duration and traversed distance in predicting age and MoCA score. In addition, the results show the significant effect of age cognitive status on spatial updating.
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Affiliation(s)
- Omid Ranjbar Pouya
- a Biomedical Engineering program , University of Manitoba , Winnipeg , MB , Canada
| | - Ahmad Byagowi
- b Department of Electrical and Computer Engineering , University of Manitoba , Winnipeg , MB , Canada
| | - Debbie M Kelly
- c Department of Psychology , University of Manitoba , Winnipeg , MB , Canada
| | - Zahra Moussavi
- a Biomedical Engineering program , University of Manitoba , Winnipeg , MB , Canada.,d Research Affiliate , Riverview Health Center , Winnipeg , MB , Canada
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32
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Entrainment of chaotic activities in brain and heart during MBSR mindfulness training. Neurosci Lett 2016; 616:218-23. [DOI: 10.1016/j.neulet.2016.01.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 11/12/2015] [Accepted: 01/04/2016] [Indexed: 12/25/2022]
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33
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Zeng LL, Long L, Shen H, Fang P, Song Y, Zhang L, Xu L, Gong J, Zhang Y, Zhang Y, Xiao B, Hu D. Gray Matter Loss and Related Functional Connectivity Alterations in A Chinese Family With Benign Adult Familial Myoclonic Epilepsy. Medicine (Baltimore) 2015; 94:e1767. [PMID: 26496303 PMCID: PMC4620778 DOI: 10.1097/md.0000000000001767] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Benign adult familial myoclonic epilepsy (BAFME) is a non-progressive monogenic epilepsy syndrome. So far, the structural and functional brain reorganizations in BAFME remain uncharacterized. This study aims to investigate gray matter atrophy and related functional connectivity alterations in patients with BAFME using magnetic resonance imaging (MRI).Eleven BAFME patients from a Chinese pedigree and 15 matched healthy controls were enrolled in the study. Optimized voxel-based morphometric and resting-state functional MRI approaches were performed to measure gray matter atrophy and related functional connectivity, respectively. The Trail-Making Test-part A and part B, Digit Symbol Test (DST), and Verbal Fluency Test (VFT) were carried out to evaluate attention and executive functions.The BAFME patients exhibited significant gray matter loss in the right hippocampus, right temporal pole, left orbitofrontal cortex, and left dorsolateral prefrontal cortex. With these regions selected as seeds, the voxel-wise functional connectivity analysis revealed that the right hippocampus showed significantly enhanced connectivity with the right inferior parietal lobule, bilateral middle cingulate cortex, left precuneus, and left precentral gyrus. Moreover, the BAFME patients showed significant lower scores in DST and VFT tests compared with the healthy controls. The gray matter densities of the right hippocampus, right temporal pole, and left orbitofrontal cortex were significantly positively correlated with the DST scores. In addition, the gray matter density of the right temporal pole was significantly positively correlated with the VFT scores, and the gray matter density of the right hippocampus was significantly negatively correlated with the duration of illness in the patients.The current study demonstrates gray matter loss and related functional connectivity alterations in the BAFME patients, perhaps underlying deficits in attention and executive functions in the BAFME.
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Affiliation(s)
- Ling-Li Zeng
- From the College of Mechatronics and Automation (Ling-Li Zeng, Hui Shen, Peng Fang, Dewen Hu), National University of Defense Technology, Changsha, Hunan 410073; Department of Neurology (Lili Long, Yanmin Song, Lin Xu, Bo Xiao), Xiangya Hospital, Central South University, Changsha, Hunan 410000; Fuyang People's Hospital (Linlin Zhang, Jian Gong, Yunci Zhang, Yong Zhang), Fuyang, Anhui 236000, People's Republic of China
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Hougaard A, Jensen BH, Amin FM, Rostrup E, Hoffmann MB, Ashina M. Cerebral Asymmetry of fMRI-BOLD Responses to Visual Stimulation. PLoS One 2015; 10:e0126477. [PMID: 25985078 PMCID: PMC4436141 DOI: 10.1371/journal.pone.0126477] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 04/02/2015] [Indexed: 11/18/2022] Open
Abstract
Hemispheric asymmetry of a wide range of functions is a hallmark of the human brain. The visual system has traditionally been thought of as symmetrically distributed in the brain, but a growing body of evidence has challenged this view. Some highly specific visual tasks have been shown to depend on hemispheric specialization. However, the possible lateralization of cerebral responses to a simple checkerboard visual stimulation has not been a focus of previous studies. To investigate this, we performed two sessions of blood-oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) in 54 healthy subjects during stimulation with a black and white checkerboard visual stimulus. While carefully excluding possible non-physiological causes of left-to-right bias, we compared the activation of the left and the right cerebral hemispheres and related this to grey matter volume, handedness, age, gender, ocular dominance, interocular difference in visual acuity, as well as line-bisection performance. We found a general lateralization of cerebral activation towards the right hemisphere of early visual cortical areas and areas of higher-level visual processing, involved in visuospatial attention, especially in top-down (i.e., goal-oriented) attentional processing. This right hemisphere lateralization was partly, but not completely, explained by an increased grey matter volume in the right hemisphere of the early visual areas. Difference in activation of the superior parietal lobule was correlated with subject age, suggesting a shift towards the left hemisphere with increasing age. Our findings suggest a right-hemispheric dominance of these areas, which could lend support to the generally observed leftward visual attentional bias and to the left hemifield advantage for some visual perception tasks.
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Affiliation(s)
- Anders Hougaard
- Danish Headache Center and Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, DK-2600, Denmark
| | - Bettina Hagström Jensen
- Danish Headache Center and Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, DK-2600, Denmark
| | - Faisal Mohammad Amin
- Danish Headache Center and Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, DK-2600, Denmark
| | - Egill Rostrup
- Functional Imaging Unit and Department of Diagnostics, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, DK-2600, Denmark
| | - Michael B. Hoffmann
- Visual Processing Laboratory, Ophthalmic Department, Otto-von-Guericke-University, Magdeburg, 39106, Germany
| | - Messoud Ashina
- Danish Headache Center and Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, DK-2600, Denmark
- * E-mail:
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Kerr MSD, Kahn K, Thompson S, Hao S, Bulacio J, Gonzalez-Martinez JA, Gale J, Sarma SV. High frequency activity correlates of robust movement in humans. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2014:4391-4. [PMID: 25570965 DOI: 10.1109/embc.2014.6944597] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The neural circuitry underlying fast robust human motor control is not well understood. In this study we record neural activity from multiple stereotactic encephalograph (SEEG) depth electrodes in a human subject while he/she performs a center-out reaching task holding a robotic manipulandum that occasionally introduces an interfering force field. Collecting neural data from humans during motor tasks is rare, and SEEG provides an unusual opportunity to examine neural correlates of movement at a millisecond time scale in multiple brain regions. Time-frequency analysis shows that high frequency activity (50-150 Hz) increases significantly in the left precuneus and left hippocampus when the subject is compensating for a perturbation to their movement. These increases in activity occur with different durations indicating differing roles in the motor control process.
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36
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Ashizuka A, Mima T, Sawamoto N, Aso T, Oishi N, Sugihara G, Kawada R, Takahashi H, Murai T, Fukuyama H. Functional relevance of the precuneus in verbal politeness. Neurosci Res 2014; 91:48-56. [PMID: 25455744 DOI: 10.1016/j.neures.2014.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 10/08/2014] [Accepted: 10/08/2014] [Indexed: 11/19/2022]
Abstract
Non-competitive and non-threatening aspects of social hierarchy, such as politeness, are universal among human cultures, and might have evolved from ritualized submission in primates; however, these behaviors have rarely been studied. Honorific language is a type of polite linguistic communication that plays an important role in human social interactions ranging from everyday conversation to international diplomacy. Here, functional magnetic resonance imaging (fMRI) revealed selective precuneus activation during a verbal politeness judgment task, but not other linguistic-judgment or social-status recognition tasks. The magnitude of the activation was correlated with the task performance. Functional suppression of the activation using cathodal transcranial direct-current stimulation reduced performance in the politeness task. These results suggest that the precuneus is an essential hub of the verbal politeness judgment.
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Affiliation(s)
- Aoi Ashizuka
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Tatsuya Mima
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan.
| | - Nobukatsu Sawamoto
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Toshihiko Aso
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Naoya Oishi
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Genichi Sugihara
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Ryosaku Kawada
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Hidehiko Takahashi
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Toshiya Murai
- Department of Psychiatry, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara, Sakyo, Kyoto 606-8507, Japan
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Lee JS, Choi J, Yoo JH, Kim M, Lee S, Kim JW, Jeong B. The effect of word imagery on priming effect under a preconscious condition: an fMRI study. Hum Brain Mapp 2014; 35:4795-804. [PMID: 24692197 PMCID: PMC4312897 DOI: 10.1002/hbm.22512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 02/03/2014] [Accepted: 03/18/2014] [Indexed: 11/18/2022] Open
Abstract
Semantic priming is affected by the degree of association and how readily a word is imagined. In the association effect, activity in the perisylvian structures including the bilateral inferior frontal gyrus, the left middle temporal gyrus, and the supramarginal gyrus was correlated. However, little is known about the brain regions related to the effect of imagery word under the preconscious condition. Forty word pairs for high (HA)‐, low (LA)‐, and nonassociation (NA), nonword (NW) conditions were presented. Each 40 association word pairs (HA and LA) included 20 high (HI) and 20 low (LI) imagery prime stimuli, using a visually presented lexical decision task. A trial consisted of 30 ms prime, 30 ms mask, 500 ms probe, and 2–8 s stimulus onset asynchrony. Brain activation was measured using functional magnetic resonance imaging during word discrimination. Behavioral data indicated that the shortest response time (RT) was given for HA words, followed by LA and NA, and NW showed the longest RT (P < 0.01). RT was faster in HI than LI within HA, but not LA conditions (P < 0.01). Functional neuroimaging showed that differential brain regions for high imagery (HI) and low imagery (LI) words within low prime‐target word association were observed in the left precuneus, left posterior cingulate gyrus, and right cuneal cortex. The present findings demonstrate that the effect of the degree of imagery on semantic priming occurs during the early stage of language processing, indicating an “automatic imagery priming effect.” Our paradigm may be useful to explore semantic deficit related to imagery in various psychiatric disorders. Hum Brain Mapp 35:4795–4804, 2014. © 2014 The Authors. Human Brain Mapping Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Jong-Sun Lee
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea
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Bruner E, Rangel de Lázaro G, de la Cuétara JM, Martín-Loeches M, Colom R, Jacobs HIL. Midsagittal brain variation and MRI shape analysis of the precuneus in adult individuals. J Anat 2014; 224:367-76. [PMID: 24397462 DOI: 10.1111/joa.12155] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2013] [Indexed: 11/29/2022] Open
Abstract
Recent analyses indicate that the precuneus is one of the main centres of integration in terms of functional and structural processes within the human brain. This neuroanatomical element is formed by different subregions, involved in visuo-spatial integration, memory and self-awareness. We analysed the midsagittal brain shape in a sample of adult humans (n = 90) to evidence the patterns of variability and geometrical organization of this area. Interestingly, the major brain covariance pattern within adult humans is strictly associated with the relative proportions of the precuneus. Its morphology displays a marked individual variation, both in terms of geometry (mostly in its longitudinal dimensions) and anatomy (patterns of convolution). No patent differences are evident between males and females, and the allometric effect of size is minimal. However, in terms of morphology, the precuneus does not represent an individual module, being influenced by different neighbouring structures. Taking into consideration the apparent involvement of the precuneus in higher-order human brain functions and evolution, its wide variation further stresses the important role of these deep parietal areas in modern neuroanatomical organization.
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Affiliation(s)
- Emiliano Bruner
- Centro Nacional de Investigación sobre la Evolución Humana, Burgos, Spain
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39
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Atmaca S, Stadler W, Keitel A, Ott DVM, Lepsien J, Prinz W. Prediction processes during multiple object tracking (MOT): involvement of dorsal and ventral premotor cortices. Brain Behav 2013; 3:683-700. [PMID: 24363971 PMCID: PMC3868173 DOI: 10.1002/brb3.180] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 08/22/2013] [Accepted: 09/02/2013] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The multiple object tracking (MOT) paradigm is a cognitive task that requires parallel tracking of several identical, moving objects following nongoal-directed, arbitrary motion trajectories. AIMS The current study aimed to investigate the employment of prediction processes during MOT. As an indicator for the involvement of prediction processes, we targeted the human premotor cortex (PM). The PM has been repeatedly implicated to serve the internal modeling of future actions and action effects, as well as purely perceptual events, by means of predictive feedforward functions. MATERIALS AND METHODS Using functional magnetic resonance imaging (fMRI), BOLD activations recorded during MOT were contrasted with those recorded during the execution of a cognitive control task that used an identical stimulus display and demanded similar attentional load. A particular effort was made to identify and exclude previously found activation in the PM-adjacent frontal eye fields (FEF). RESULTS We replicated prior results, revealing occipitotemporal, parietal, and frontal areas to be engaged in MOT. DISCUSSION The activation in frontal areas is interpreted to originate from dorsal and ventral premotor cortices. The results are discussed in light of our assumption that MOT engages prediction processes. CONCLUSION We propose that our results provide first clues that MOT does not only involve visuospatial perception and attention processes, but prediction processes as well.
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Affiliation(s)
- Silke Atmaca
- Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany
| | - Waltraud Stadler
- Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany
- Technische Universität MünchenMunich, Germany
| | - Anne Keitel
- Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany
| | - Derek V M Ott
- Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany
- Evangelisches Krankenhaus Königin Elisabeth Herzberge gGmbH, Institut für Diagnostik der EpilepsienBerlin, Germany
| | - Jöran Lepsien
- Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany
| | - Wolfgang Prinz
- Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany
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Suppa A, Li Voti P, Rocchi L, Papazachariadis O, Berardelli A. Early Visuomotor Integration Processes Induce LTP/LTD-Like Plasticity in the Human Motor Cortex. Cereb Cortex 2013; 25:703-12. [PMID: 24057659 DOI: 10.1093/cercor/bht264] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Suppa
- IRCCS Neuromed Institute, Pozzilli (IS), Italy
| | - P Li Voti
- IRCCS Neuromed Institute, Pozzilli (IS), Italy
| | - L Rocchi
- Department of Neurology and Psychiatry
| | - O Papazachariadis
- Department of Physiology and Pharmacology, "Sapienza" University of Rome, 00185 Rome, Italy
| | - A Berardelli
- IRCCS Neuromed Institute, Pozzilli (IS), Italy Department of Neurology and Psychiatry
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Novembre G, Ticini LF, Schütz-Bosbach S, Keller PE. Motor simulation and the coordination of self and other in real-time joint action. Soc Cogn Affect Neurosci 2013; 9:1062-8. [PMID: 23709353 DOI: 10.1093/scan/nst086] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Joint actions require the integration of simultaneous self- and other-related behaviour. Here, we investigated whether this function is underpinned by motor simulation, that is the capacity to represent a perceived action in terms of the neural resources required to execute it. This was tested in a music performance experiment wherein on-line brain stimulation (double-pulse transcranial magnetic stimulation, dTMS) was employed to interfere with motor simulation. Pianists played the right-hand part of piano pieces in synchrony with a recording of the left-hand part, which had (Trained) or had not (Untrained) been practiced beforehand. Training was assumed to enhance motor simulation. The task required adaptation to tempo changes in the left-hand part that, in critical conditions, were preceded by dTMS delivered over the right primary motor cortex. Accuracy of tempo adaptation following dTMS or sham stimulations was compared across Trained and Untrained conditions. Results indicate that dTMS impaired tempo adaptation accuracy only during the perception of trained actions. The magnitude of this interference was greater in empathic individuals possessing a strong tendency to adopt others' perspectives. These findings suggest that motor simulation provides a functional resource for the temporal coordination of one's own behaviour with others in dynamic social contexts.
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Affiliation(s)
- Giacomo Novembre
- Research Group 'Music Cognition and Action', Research Group 'Body and Self', Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, and The MARCS Institute, University of Western Sydney, Australia
| | - Luca F Ticini
- Research Group 'Music Cognition and Action', Research Group 'Body and Self', Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, and The MARCS Institute, University of Western Sydney, Australia
| | - Simone Schütz-Bosbach
- Research Group 'Music Cognition and Action', Research Group 'Body and Self', Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, and The MARCS Institute, University of Western Sydney, Australia
| | - Peter E Keller
- Research Group 'Music Cognition and Action', Research Group 'Body and Self', Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, and The MARCS Institute, University of Western Sydney, AustraliaResearch Group 'Music Cognition and Action', Research Group 'Body and Self', Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, and The MARCS Institute, University of Western Sydney, Australia
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Mengotti P, Ticini LF, Waszak F, Schütz-Bosbach S, Rumiati RI. Imitating others' actions: transcranial magnetic stimulation of the parietal opercula reveals the processes underlying automatic imitation. Eur J Neurosci 2012; 37:316-22. [DOI: 10.1111/ejn.12019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 09/07/2012] [Accepted: 09/14/2012] [Indexed: 11/28/2022]
Affiliation(s)
- Paola Mengotti
- SISSA; Neuroscience Area; Via Bonomea 265; 34136; Trieste; Italy
| | - Luca F. Ticini
- Max Planck Institute for Human Cognitive and Brain Sciences; Leipzig; Germany
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Faget-Agius C, Boyer L, Padovani R, Richieri R, Mundler O, Lançon C, Guedj E. Schizophrenia with preserved insight is associated with increased perfusion of the precuneus. J Psychiatry Neurosci 2012; 37:297-304. [PMID: 22498076 PMCID: PMC3447128 DOI: 10.1503/jpn.110125] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 01/02/2012] [Accepted: 02/10/2012] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Preserved insight into illness has been suggested to be predictive of outcome in patients with schizophrenia. We aimed to investigate the functional substrate underlying preserved insight in these patients. METHODS We recruited patients with paranoid schizophrenia and healthy controls matched for age and sex. Patients were grouped according to preserved or impaired insight into illness using the Scale to assess Unawareness of Mental Disorder (SUMD). Whole-brain technetium-99m ethyl cysteinate dimer single photon emission computed tomography regional cerebral blood flow was compared at the voxel level between the 2 groups using a statistical parametric map (voxel-level significance of p < 0.001, uncorrected; cluster level significance of p < 0.05, uncorrected). RESULTS We enrolled 31 right-handed patients with schizophrenia and 18 controls in our study. Twenty-one (67.7%) patients had preserved insight. The 2 groups did not differ significantly in demographic and clinical characteristics or in treatment. Compared with controls, the whole group of patients showed bilateral frontotemporal hypoperfusions, with no statistical difference between patients with preserved or impaired insight for these areas. Patients with preserved insight showed significantly increased perfusion of the bilateral precuneus relative to those with impaired insight. LIMITATIONS Patients with subtypes other than paranoid schizophrenia have to be investigated to assess whether involvement of the precuneus in patients with preserved insight can be identified across the full spectrum of subtypes and symptoms of schizophrenia. Moreover, our study concerned only the central dimension (awareness of mental disorder) of 1 scale (SUMD); other dimensions of insight could be studied. CONCLUSION Our results show that schizophrenia with preserved insight is associated with greater perfusion of the precuneus, a brain area known to be involved in self- consciousness, suggesting a compensatory mechanism of fronto-temporal impairment.
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Affiliation(s)
| | | | - Romain Padovani
- Faget-Agius, Boyer, Padovani, Richieri, Lançon — Aix-Marseille University, Research Unit EA 3279, Marseille; Faget-Agius, Padovani, Richieri, Lançon — Hôpital Sainte Marguerite, Département de psychiatrie, Marseille; Boyer — Hôpital de la Timone, Département de santé publique, Marseille; Mundler, Guedj — Hôpital de la Timone, Service Central de Biophysique et Médecine Nucléaire, Aix-Marseille University and European Centre for Research on Medical Imaging (CERIMED), Marseille; Guedj — Aix-Marseille University and the Centre national de la recherche scientifique, Institut de Neurosciences de la Timone (INT), UMR CNRS 7289, Marseille, France
| | - Raphaëlle Richieri
- Faget-Agius, Boyer, Padovani, Richieri, Lançon — Aix-Marseille University, Research Unit EA 3279, Marseille; Faget-Agius, Padovani, Richieri, Lançon — Hôpital Sainte Marguerite, Département de psychiatrie, Marseille; Boyer — Hôpital de la Timone, Département de santé publique, Marseille; Mundler, Guedj — Hôpital de la Timone, Service Central de Biophysique et Médecine Nucléaire, Aix-Marseille University and European Centre for Research on Medical Imaging (CERIMED), Marseille; Guedj — Aix-Marseille University and the Centre national de la recherche scientifique, Institut de Neurosciences de la Timone (INT), UMR CNRS 7289, Marseille, France
| | - Olivier Mundler
- Faget-Agius, Boyer, Padovani, Richieri, Lançon — Aix-Marseille University, Research Unit EA 3279, Marseille; Faget-Agius, Padovani, Richieri, Lançon — Hôpital Sainte Marguerite, Département de psychiatrie, Marseille; Boyer — Hôpital de la Timone, Département de santé publique, Marseille; Mundler, Guedj — Hôpital de la Timone, Service Central de Biophysique et Médecine Nucléaire, Aix-Marseille University and European Centre for Research on Medical Imaging (CERIMED), Marseille; Guedj — Aix-Marseille University and the Centre national de la recherche scientifique, Institut de Neurosciences de la Timone (INT), UMR CNRS 7289, Marseille, France
| | - Christophe Lançon
- Faget-Agius, Boyer, Padovani, Richieri, Lançon — Aix-Marseille University, Research Unit EA 3279, Marseille; Faget-Agius, Padovani, Richieri, Lançon — Hôpital Sainte Marguerite, Département de psychiatrie, Marseille; Boyer — Hôpital de la Timone, Département de santé publique, Marseille; Mundler, Guedj — Hôpital de la Timone, Service Central de Biophysique et Médecine Nucléaire, Aix-Marseille University and European Centre for Research on Medical Imaging (CERIMED), Marseille; Guedj — Aix-Marseille University and the Centre national de la recherche scientifique, Institut de Neurosciences de la Timone (INT), UMR CNRS 7289, Marseille, France
| | - Eric Guedj
- Faget-Agius, Boyer, Padovani, Richieri, Lançon — Aix-Marseille University, Research Unit EA 3279, Marseille; Faget-Agius, Padovani, Richieri, Lançon — Hôpital Sainte Marguerite, Département de psychiatrie, Marseille; Boyer — Hôpital de la Timone, Département de santé publique, Marseille; Mundler, Guedj — Hôpital de la Timone, Service Central de Biophysique et Médecine Nucléaire, Aix-Marseille University and European Centre for Research on Medical Imaging (CERIMED), Marseille; Guedj — Aix-Marseille University and the Centre national de la recherche scientifique, Institut de Neurosciences de la Timone (INT), UMR CNRS 7289, Marseille, France
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Tanaka S, Seki K, Hanakawa T, Harada M, Sugawara SK, Sadato N, Watanabe K, Honda M. Abacus in the brain: a longitudinal functional MRI study of a skilled abacus user with a right hemispheric lesion. Front Psychol 2012; 3:315. [PMID: 22969743 PMCID: PMC3428809 DOI: 10.3389/fpsyg.2012.00315] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 08/10/2012] [Indexed: 11/13/2022] Open
Abstract
The abacus, a traditional physical calculation device, is still widely used in Asian countries. Previous behavioral work has shown that skilled abacus users perform rapid and precise mental arithmetic by manipulating a mental representation of an abacus, which is based on visual imagery. However, its neurophysiological basis remains unclear. Here, we report the case of a patient who was a good abacus user, but transiently lost her "mental abacus" and superior arithmetic performance after a stroke owing to a right hemispheric lesion including the dorsal premotor cortex (PMd) and inferior parietal lobule (IPL). Functional magnetic resonance imaging experiments were conducted 6 and 13 months after her stroke. In the mental calculation task, her brain activity was shifted from the language-related areas, including Broca's area and the left dorsolateral prefrontal and IPLs, to the visuospatial-related brain areas including the left superior parietal lobule (SPL), according to the recovery of her arithmetic abilities. In the digit memory task, activities in the bilateral SPL, and right visual association cortex were also observed after recovery. The shift of brain activities was consistent with her subjective report that she was able to shift the calculation strategy from linguistic to visuospatial as her mental abacus became stable again. In a behavioral experiment using an interference paradigm, a visual presentation of an abacus picture, but not a human face picture, interfered with the performance of her digit memory, confirming her use of the mental abacus after recovery. This is the first case report on the impairment of the mental abacus by a brain lesion and on recovery-related brain activity. We named this rare case "abacus-based acalculia." Together with previous neuroimaging studies, the present result suggests an important role for the PMd and parietal cortex in the superior arithmetic ability of abacus users.
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Affiliation(s)
- Satoshi Tanaka
- Center for Fostering Young and Innovative Researchers, Nagoya Institute of TechnologyNagoya, Japan
| | - Keiko Seki
- Graduate School of Health Sciences, Kobe UniversityKobe, Japan
| | - Takashi Hanakawa
- Department of Functional Brain Research, National Institute of NeuroscienceKodaira, Japan
| | - Madoka Harada
- Department of Rehabilitation Medicine, Eisei HospitalHachioji, Japan
| | - Sho K. Sugawara
- Division of Cerebral Integration, National Institute for Physiological SciencesOkazaki, Japan
- School of Life Sciences, The Graduate University for Advanced Studies (SOKENDAI)Hayama, Japan
| | - Norihiro Sadato
- Division of Cerebral Integration, National Institute for Physiological SciencesOkazaki, Japan
- School of Life Sciences, The Graduate University for Advanced Studies (SOKENDAI)Hayama, Japan
| | - Katsumi Watanabe
- Research Center for Advanced Technology and Science, The University of TokyoKomaba, Japan
| | - Manabu Honda
- Department of Functional Brain Research, National Institute of NeuroscienceKodaira, Japan
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45
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Sequential neural processes in abacus mental addition: an EEG and FMRI case study. PLoS One 2012; 7:e36410. [PMID: 22574155 PMCID: PMC3344852 DOI: 10.1371/journal.pone.0036410] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 04/09/2012] [Indexed: 11/19/2022] Open
Abstract
Abacus experts are able to mentally calculate multi-digit numbers rapidly. Some behavioral and neuroimaging studies have suggested a visuospatial and visuomotor strategy during abacus mental calculation. However, no study up to now has attempted to dissociate temporally the visuospatial neural process from the visuomotor neural process during abacus mental calculation. In the present study, an abacus expert performed the mental addition tasks (8-digit and 4-digit addends presented in visual or auditory modes) swiftly and accurately. The 100% correct rates in this expert’s task performance were significantly higher than those of ordinary subjects performing 1-digit and 2-digit addition tasks. ERPs, EEG source localizations, and fMRI results taken together suggested visuospatial and visuomotor processes were sequentially arranged during the abacus mental addition with visual addends and could be dissociated from each other temporally. The visuospatial transformation of the numbers, in which the superior parietal lobule was most likely involved, might occur first (around 380 ms) after the onset of the stimuli. The visuomotor processing, in which the superior/middle frontal gyri were most likely involved, might occur later (around 440 ms). Meanwhile, fMRI results suggested that neural networks involved in the abacus mental addition with auditory stimuli were similar to those in the visual abacus mental addition. The most prominently activated brain areas in both conditions included the bilateral superior parietal lobules (BA 7) and bilateral middle frontal gyri (BA 6). These results suggest a supra-modal brain network in abacus mental addition, which may develop from normal mental calculation networks.
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46
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Stadler W, Ott DVM, Springer A, Schubotz RI, Schütz-Bosbach S, Prinz W. Repetitive TMS suggests a role of the human dorsal premotor cortex in action prediction. Front Hum Neurosci 2012; 6:20. [PMID: 22363279 PMCID: PMC3282473 DOI: 10.3389/fnhum.2012.00020] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Accepted: 02/02/2012] [Indexed: 11/17/2022] Open
Abstract
Predicting the actions of other individuals is crucial for our daily interactions. Recent evidence suggests that the prediction of object-directed arm and full-body actions employs the dorsal premotor cortex (PMd). Thus, the neural substrate involved in action control may also be essential for action prediction. Here, we aimed to address this issue and hypothesized that disrupting the PMd impairs action prediction. Using fMRI-guided coil navigation, rTMS (five pulses, 10 Hz) was applied over the left PMd and over the vertex (control region) while participants observed everyday actions in video clips that were transiently occluded for 1 s. The participants detected manipulations in the time course of occluded actions, which required them to internally predict the actions during occlusion. To differentiate between functional roles that the PMd could play in prediction, rTMS was either delivered at occluder-onset (TMS-early), affecting the initiation of action prediction, or 300 ms later during occlusion (TMS-late), affecting the maintenance of an ongoing prediction. TMS-early over the left PMd produced more prediction errors than TMS-early over the vertex. TMS-late had no effect on prediction performance, suggesting that the left PMd might be involved particularly during the initiation of internally guided action prediction but may play a subordinate role in maintaining ongoing prediction. These findings open a new perspective on the role of the left PMd in action prediction which is in line with its functions in action control and in cognitive tasks. In the discussion, the relevance of the left PMd for integrating external action parameters with the observer’s motor repertoire is emphasized. Overall, the results are in line with the notion that premotor functions are employed in both action control and action observation.
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Affiliation(s)
- Waltraud Stadler
- Department of Psychology, Max Planck Institute for Human Cognitive and Brain Sciences Leipzig, Germany
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47
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Effects of brain amyloid deposition and reduced glucose metabolism on the default mode of brain function in normal aging. J Neurosci 2011; 31:11193-9. [PMID: 21813680 DOI: 10.1523/jneurosci.2535-11.2011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Brain β-amyloid (Aβ) deposition during normal aging is highlighted as an initial pathogenetic event in the development of Alzheimer's disease. Many recent brain imaging studies have focused on areas deactivated during cognitive tasks [the default mode network (DMN), i.e., medial frontal gyrus/anterior cingulate cortex and precuneus/posterior cingulate cortex], where the strength of functional coordination was more or less affected by cerebral Aβ deposits. In the present positron emission tomography study, to investigate whether regional glucose metabolic alterations and Aβ deposits seen in nondemented elderly human subjects (n = 22) are of pathophysiological importance in changes of brain hemodynamic coordination in DMN during normal aging, we measured cerebral glucose metabolism with [(18)F]FDG, Aβ deposits with [(11)C]PIB, and regional cerebral blood flow during control and working memory tasks by H(2)(15)O on the same day. Data were analyzed using both region of interest and statistical parametric mapping. Our results indicated that the amount of Aβ deposits was negatively correlated with hemodynamic similarity between medial frontal and medial posterior regions, and the lower similarity was associated with poorer working memory performance. In contrast, brain glucose metabolism was not related to this medial hemodynamic similarity. These findings suggest that traceable Aβ deposition, but not glucose hypometabolism, in the brain plays an important role in occurrence of neuronal discoordination in DMN along with poor working memory in healthy elderly people.
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48
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Hanakawa T. Rostral premotor cortex as a gateway between motor and cognitive networks. Neurosci Res 2011; 70:144-54. [PMID: 21382425 DOI: 10.1016/j.neures.2011.02.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 01/31/2011] [Accepted: 02/24/2011] [Indexed: 11/30/2022]
Abstract
This article presents a hypothesis that the rostral premotor-subcortical networks may serve as a gateway between the cognitive and motor networks. Accumulating evidence has propelled an idea that motor and cognitive behaviors considerably share neural substrates and probably computational principles regardless of the species. Here I conducted a meta-analysis of previous neuroimaging studies on motor planning and different cognitive tasks (mental calculation, visuospatial processing and cognitive control), which showed overlap of all activations in the rostral premotor cortex, with a possible rostro-caudal functional gradient. It was also suggested that the rostral premotor areas might form circuits with specific portions of the cerebellum and the basal ganglia. The rostral premotor areas may provide context-dependent connectivity and mediate information flow between the cognitive and motor networks, thereby making the two networks operating interactively or independently.
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Affiliation(s)
- Takashi Hanakawa
- Department of Functional Brain Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Japan.
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Yang H, Yu T, Sun C, Meng XH, Yu YJ, Huo SJ, Zhang JQ. Spectral-domain optical coherence tomography in patients with congenital nystagmus. Int J Ophthalmol 2011; 4:627-30. [PMID: 22553733 DOI: 10.3980/j.issn.2222-3959.2011.06.10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Accepted: 11/18/2011] [Indexed: 11/02/2022] Open
Abstract
AIM To study macular features in patients with congenital nystagmus and to assess the utility of spectral-domain optical coherence tomography (SD-OCT) in nystagmus. METHODS The macular areas of 51 outpatients with congenital nystagmus were examined using SD-OCT. Morphological changes in the retinal layers of the macular area were analysed. RESULTS Macular images were successfully obtained with SD-OCT from 50 (98%) patients. Patients with ocular albinism mainly have macular hypoplasia, abnormal foveal depression, and increased foveal thickness with persistence of an inner nuclear layer, an inner plexiform layer, a ganglion cell layer and a nerve fiber layer. Macular morphology similar to albinism was observed in three patients with idiopathic macular hypoplasia. The OCT findings of cone dystrophy included unclear, disrupted or invisible photoreceptor outer segment/inner segment in the fovea; fusion, thickening and uneven reflection of the outer segment/inner segment with external limiting membrane. Some patients with congenital idiopathic nystagmus showed normal macular morphology and structure, and others showed indistinct macular external limiting membrane reflection. CONCLUSION SD-OCT is an effective and reliable method to detect the macular morphology of congenital nystagmus patients. This technique has diagnostic value in particular for patients with macular hypoplasia and cone cell dystrophy with no distinct abnormality on fundoscopy.
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Affiliation(s)
- Hong Yang
- Southwest Eye Hospital, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
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Lorey B, Pilgramm S, Walter B, Stark R, Munzert J, Zentgraf K. Your mind's hand: motor imagery of pointing movements with different accuracy. Neuroimage 2009; 49:3239-47. [PMID: 19948224 DOI: 10.1016/j.neuroimage.2009.11.038] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2009] [Revised: 11/04/2009] [Accepted: 11/15/2009] [Indexed: 11/20/2022] Open
Abstract
Jeannerod (2001) postulated that motor control and motor simulation states are functionally equivalent. If this is the case, the specifically relevant task parameters in online motor control should also be represented in motor imagery. We tested whether the different spatial accuracy demands of manual pointing movements are reflected on a neural level in motor imagery. During functional magnetic resonance imaging (fMRI) scanning, 23 participants imagined hand movements that differed systematically in terms of pointing accuracy needs (i.e., none, low, high). In a low-accuracy condition, two big squares were presented visually prior to the imagery phase. These squares had to be pointed at alternately on a mental level. In the high-accuracy condition, two little squares had to be hit. As expected on the basis of speed-accuracy trade-off principles, results showed that participants required more time when accuracy of the imagined movements increased. The fMRI results showed a stepwise increase in activation in the anterior cerebellum and the anterior part of the superior parietal lobe (SPL) with rising accuracy needs. Moreover, we found increased activation of the anterior part of the SPL and of the dorsal premotor cortex (dPMC) when imagery included a square (i.e., in the low- and high-accuracy conditions) compared to the no-square condition. These areas have also been discussed in relation to online motor control, suggesting that specific task parameters relevant in the domain of motor control are also coded in motor imagery. We suggest that the functional equivalence of action states is due mostly to internal estimations of the expected sensory feedback in both motor control and motor imagery.
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Affiliation(s)
- Britta Lorey
- University of Giessen, Germany, Institute for Sports Science, Germany.
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