Joao Ricardo Sato

Summary

Publications

  1. ncbi request reprint Frequency domain connectivity identification: an application of partial directed coherence in fMRI
    Joao R Sato
    Department of Statistics, Institute of Mathematics and Statistics, University of Sao Paulo, Brazil
    Hum Brain Mapp 30:452-61. 2009
  2. ncbi request reprint A method to produce evolving functional connectivity maps during the course of an fMRI experiment using wavelet-based time-varying Granger causality
    Joao Ricardo Sato
    Institute of Mathematics and Statistics, University of Sao Paulo, Rua do Matao, 1010, Cidade Universitaria, CEP 05508 090, Sao Paulo, S P, Brazil
    Neuroimage 31:187-96. 2006
  3. pmc Evaluating different methods of microarray data normalization
    Andre Fujita
    Institute of Mathematics and Statistics, University of Sao Paulo, Rua do Matao, 1010 São Paulo, 05508 090 SP, Brazil
    BMC Bioinformatics 7:469. 2006
  4. ncbi request reprint DWT-CEM: an algorithm for scale-temporal clustering in fMRI
    Joao Ricardo Sato
    Institute of Mathematics and Statistics, University of Sao Paulo, Rua do Matao, 1010, Cidade Universitria, CEP 05508 090, Sao Paulo, S P, Brazil
    Biol Cybern 97:33-45. 2007
  5. doi request reprint An fMRI normative database for connectivity networks using one-class support vector machines
    Joao Ricardo Sato
    Department of Statistics, Institute of Mathematics and Statistics, University of Sao Paulo, Brazil
    Hum Brain Mapp 30:1068-76. 2009
  6. pmc Abnormal brain connectivity patterns in adults with ADHD: a coherence study
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Santo Andre, Brazil
    PLoS ONE 7:e45671. 2012
  7. doi request reprint Can neuroimaging be used as a support to diagnosis of borderline personality disorder? An approach based on computational neuroanatomy and machine learning
    Joao Ricardo Sato
    Universidade Federal do ABC, Santo Andre, Brazil
    J Psychiatr Res 46:1126-32. 2012
  8. pmc Multivariate gene expression analysis reveals functional connectivity changes between normal/tumoral prostates
    Andre Fujita
    Human Genome Center, Institute of Medical Science, University of Tokyo, Minato ku, Tokyo, Japan
    BMC Syst Biol 2:106. 2008
  9. doi request reprint The impact of functional connectivity changes on support vector machines mapping of fMRI data
    Joao Ricardo Sato
    Department of Statistics, Institute of Mathematics and Statistics, University of Sao Paulo, Brazil
    J Neurosci Methods 172:94-104. 2008
  10. doi request reprint Hyperplane navigation: a method to set individual scores in fMRI group datasets
    Joao Ricardo Sato
    NIF LIM44 Institute of Radiology, Hospital das Clinicas, University of Sao Paulo, Brazil
    Neuroimage 42:1473-80. 2008

Collaborators

Detail Information

Publications37

  1. ncbi request reprint Frequency domain connectivity identification: an application of partial directed coherence in fMRI
    Joao R Sato
    Department of Statistics, Institute of Mathematics and Statistics, University of Sao Paulo, Brazil
    Hum Brain Mapp 30:452-61. 2009
    ..Real fMRI dataset of six subjects executing a language processing protocol was used for the analysis of connectivity...
  2. ncbi request reprint A method to produce evolving functional connectivity maps during the course of an fMRI experiment using wavelet-based time-varying Granger causality
    Joao Ricardo Sato
    Institute of Mathematics and Statistics, University of Sao Paulo, Rua do Matao, 1010, Cidade Universitaria, CEP 05508 090, Sao Paulo, S P, Brazil
    Neuroimage 31:187-96. 2006
    ..Simulation results show a good performance of this approach even using short time intervals. The application of this new approach is illustrated with fMRI data from a simple AB motor task experiment...
  3. pmc Evaluating different methods of microarray data normalization
    Andre Fujita
    Institute of Mathematics and Statistics, University of Sao Paulo, Rua do Matao, 1010 São Paulo, 05508 090 SP, Brazil
    BMC Bioinformatics 7:469. 2006
    ..Due to technical biases, normalization of the intensity levels is a pre-requisite to performing further statistical analyses. Therefore, choosing a suitable approach for normalization can be critical, deserving judicious consideration...
  4. ncbi request reprint DWT-CEM: an algorithm for scale-temporal clustering in fMRI
    Joao Ricardo Sato
    Institute of Mathematics and Statistics, University of Sao Paulo, Rua do Matao, 1010, Cidade Universitria, CEP 05508 090, Sao Paulo, S P, Brazil
    Biol Cybern 97:33-45. 2007
    ..We also provide examples of the technique applied to simulated and real fMRI datasets...
  5. doi request reprint An fMRI normative database for connectivity networks using one-class support vector machines
    Joao Ricardo Sato
    Department of Statistics, Institute of Mathematics and Statistics, University of Sao Paulo, Brazil
    Hum Brain Mapp 30:1068-76. 2009
    ..An application of this approach is illustrated using an fMRI dataset of 43 healthy subjects performing a visual working memory task. In addition, the relationships between the results obtained and behavioral data are explored...
  6. pmc Abnormal brain connectivity patterns in adults with ADHD: a coherence study
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Santo Andre, Brazil
    PLoS ONE 7:e45671. 2012
    ....
  7. doi request reprint Can neuroimaging be used as a support to diagnosis of borderline personality disorder? An approach based on computational neuroanatomy and machine learning
    Joao Ricardo Sato
    Universidade Federal do ABC, Santo Andre, Brazil
    J Psychiatr Res 46:1126-32. 2012
    ..The findings suggest that this new methodology can add clinical and potential diagnostic value to neuroimaging of psychiatric disorders...
  8. pmc Multivariate gene expression analysis reveals functional connectivity changes between normal/tumoral prostates
    Andre Fujita
    Human Genome Center, Institute of Medical Science, University of Tokyo, Minato ku, Tokyo, Japan
    BMC Syst Biol 2:106. 2008
    ..In order to understand the biological process behind potential biomarkers, we have analyzed a set of 57 cDNA microarrays containing approximately 25,000 genes...
  9. doi request reprint The impact of functional connectivity changes on support vector machines mapping of fMRI data
    Joao Ricardo Sato
    Department of Statistics, Institute of Mathematics and Statistics, University of Sao Paulo, Brazil
    J Neurosci Methods 172:94-104. 2008
    ..In the application to a visual working memory fMRI data, we demonstrated that the interaction among brain regions play a role in SDM's power to detect discriminative voxels...
  10. doi request reprint Hyperplane navigation: a method to set individual scores in fMRI group datasets
    Joao Ricardo Sato
    NIF LIM44 Institute of Radiology, Hospital das Clinicas, University of Sao Paulo, Brazil
    Neuroimage 42:1473-80. 2008
    ..e., an index quantifying the distance between the states of a subject from predefined groups. We validate and illustrate this approach using a motor block design fMRI experiment data with 35 subjects...
  11. doi request reprint Evaluating SVM and MLDA in the extraction of discriminant regions for mental state prediction
    Joao Ricardo Sato
    NIF LIM44, Institute of Radiology, Hospital das Clinicas, University of Sao Paulo, Brazil
    Neuroimage 46:105-14. 2009
    ..In conclusion, MLDA is mostly focused on extracting all discriminative information available, while SVM extracts the information which is sufficient for classification...
  12. doi request reprint Analyzing the connectivity between regions of interest: an approach based on cluster Granger causality for fMRI data analysis
    Joao R Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Sao Paulo, Brazil
    Neuroimage 52:1444-55. 2010
    ..With this data set, the proposed approach suggested the presence of significantly more connections between the ROIs than were detected using a single representative time series in each ROI...
  13. doi request reprint Connectome hubs at resting state in children and adolescents: Reproducibility and psychopathological correlation
    Joao Ricardo Sato
    Centro de Matemática, Computação e Cognição, Universidade Federal do ABC, Santo Andre, Brazil Interdisciplinary Lab for Clinical Neurosciences LiNC, Universidade Federal de Sao Paulo UNIFESP, Sao Paulo, Brazil Department of Radiology, School of Medicine, University of Sao Paulo, Brazil National Institute of Developmental Psychiatry for Children and Adolescents, CNPq, Brazil Electronic address
    Dev Cogn Neurosci 20:2-11. 2016
    ..The identification of critical and replicable hubs in functional cortical networks in children and adolescents can foster understanding of the mechanisms underlying mental disorders. ..
  14. doi request reprint Decreased centrality of subcortical regions during the transition to adolescence: a functional connectivity study
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Santo Andre, Brazil Interdisciplinary Lab for Clinical Neurosciences LiNC, Universidade Federal de Sao Paulo UNIFESP, Sao Paulo, Brazil National Institute of Developmental Psychiatry for Children and Adolescents, CNPq, Brazil Electronic address
    Neuroimage 104:44-51. 2015
    ..In conclusion, we report a novel finding of an increasing centrality of the angular gyrus during the transition to adolescence, with a decreasing centrality of many subcortical and cerebellar regions. ..
  15. pmc An integrative approach to investigate the respective roles of single-nucleotide variants and copy-number variants in Attention-Deficit/Hyperactivity Disorder
    Leandro de Araújo Lima
    Inter institutional Grad Program on Bioinformatics, University of Sao Paulo, Sao Paulo, SP, Brazil
    Sci Rep 6:22851. 2016
    ....
  16. doi request reprint Temporal stability of network centrality in control and default mode networks: Specific associations with externalizing psychopathology in children and adolescents
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Santo Andre, Brazil
    Hum Brain Mapp 36:4926-37. 2015
    ..Taken together, these results suggest that changes in functional network dynamics during neurodevelopment may provide unique insights regarding pathophysiology...
  17. doi request reprint Age-effects in white matter using associated diffusion tensor imaging and magnetization transfer ratio during late childhood and early adolescence
    Luciana Monteiro Moura
    Department of Psychiatry, Federal University of Sao Paulo, Sao Paulo, Brazil Interdisciplinary Lab of Clinical Neurosciences LiNC, Federal University of Sao Paulo UNIFESP, Sao Paulo, Brazil Institute of Psychiatry, Psychology and Neurosciences, King s College, London, UK Electronic address
    Magn Reson Imaging 34:529-34. 2016
    ..In addition, a significant age-effect was detected for DTI data but was not visible for MTR data. Thereby, changes in white matter at this age might be primarily correlated with microstructural changes. ..
  18. doi request reprint Relationship Between Surface-Based Brain Morphometric Measures and Intelligence in Autism Spectrum Disorders: Influence of History of Language Delay
    Joana Bisol Balardin
    Department of Neurology and NIF LIM44, FMUSP, University of Sao Paulo, Sao Paulo, Brazil
    Autism Res 8:556-66. 2015
    ....
  19. doi request reprint Measuring network's entropy in ADHD: a new approach to investigate neuropsychiatric disorders
    Joao Ricardo Sato
    Center of Mathematics, Computation, and Cognition, Federal University of ABC, Rua Santa Adelia 166, Santo Andre, SP, Brazil
    Neuroimage 77:44-51. 2013
    ..We conclude that analysis of topological organization of brain sub-networks based on GSE can identify networks between brain regions previously unobserved to be in association with ADHD...
  20. pmc Identification of segregated regions in the functional brain connectome of autistic patients by a combination of fuzzy spectral clustering and entropy analysis
    Joao Ricardo Sato
    From the Center of Mathematics, Computation, and Cognition, Universidade Federal do ABC, Santo Andre, SP, Brazil Sato, Balardin and the Department of Computer Science, Institute of Mathematics and Statistics, University of Sao Paulo, Sao Paulo, SP, Brazil Vidal, Fujita
    J Psychiatry Neurosci 41:124-32. 2016
    ..In this study, we aimed to test the hypothesis of reduced functional network segregation in autistic patients compared with controls...
  21. doi request reprint Is there an association between cortical thickness, age of onset, and duration of illness in schizophrenia?
    Idaiane Batista Assunção Leme
    1 Laboratório Interdisciplinar de Neurociências Clínicas LiNC, Universidade Federal de Sao Paulo UNIFESP, Sao Paulo, Brazil
    CNS Spectr 18:315-21. 2013
    ..The aim of this study was to investigate possible cortical thickness correlations in frontotemporal regions in relation to age at onset and duration of illness...
  22. doi request reprint Personality traits in juvenile myoclonic epilepsy: evidence of cortical abnormalities from a surface morphometry study
    Gerardo Maria de Araújo Filho
    Laboratório Interdisciplinar de Neurociências Clínicas LiNC, Department of Psychiatry, Universidade Federal de Sao Paulo UNIFESP, Sao Paulo, Brazil
    Epilepsy Behav 27:385-92. 2013
    ....
  23. doi request reprint Inter-regional cortical thickness correlations are associated with autistic symptoms: a machine-learning approach
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Rua Santa Adelia, 166, Bairro Bangu, CEP 09 210 170 Santo André, SP, Brazil
    J Psychiatr Res 47:453-9. 2013
    ..Finally, we identified several brain areas containing relevant information, such as frontal and temporal regions. This study provides evidence for the usefulness of this new tool to characterize neuropsychiatric disorders...
  24. doi request reprint Children with Poor Reading Skills at the Word Level Show Reduced Fractional Anisotropy in White Matter Tracts of Both Hemispheres
    Luciana Monteiro de Moura
    1 Department of Psychiatry, Federal University of Sao Paulo, Sao Paulo, Brazil
    Brain Connect 6:519-23. 2016
    ....
  25. pmc Functional clustering of time series gene expression data by Granger causality
    Andre Fujita
    Institute of Mathematics and Statistics, University of Sao Paulo, Rua do Matao, 1010, São Paulo 05508 090, Brazil
    BMC Syst Biol 6:137. 2012
    ..However, since genes belong to intricate networks, other features, besides comparable expression patterns, should provide additional information for the identification of functionally similar genes...
  26. pmc Stroke lesion in cortical neural circuits and post-stroke incidence of major depressive episode: a 4-month prospective study
    Luisa Terroni
    Liaison Psychiatry Group, Department and Institute of Psychiatry, Clinical Hospital, Medical School, University of Sao Paulo, Sao Paulo, Brazil
    World J Biol Psychiatry 12:539-48. 2011
    ..We investigated the association between lesion stroke size in the limbic-cortical-striatal-pallidal-thalamic (LCSPT) circuit and incidence of major depressive episode (MDE)...
  27. doi request reprint Decreased centrality of cortical volume covariance networks in autism spectrum disorders
    Joana Bisol Balardin
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Santo Andre, Brazil
    J Psychiatr Res 69:142-9. 2015
    ..These findings provide further evidence for the altered network-level connectivity model of ASD. ..
  28. doi request reprint Age effects on the default mode and control networks in typically developing children
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Santo Andre, Brazil Interdisciplinary Lab for Clinical Neurosciences LiNC, Universidade Federal de Sao Paulo UNIFESP, Sao Paulo, Brazil National Institute of Developmental Psychiatry for Children and Adolescents, CNPq, Brazil Electronic address
    J Psychiatr Res 58:89-95. 2014
    ....
  29. doi request reprint High risk cohort study for psychiatric disorders in childhood: rationale, design, methods and preliminary results
    Giovanni Abrahão Salum
    National Institute of Developmental Psychiatry for Children and Adolescents INCT CNPq, Sao Paulo, Brazil Department of Psychiatry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
    Int J Methods Psychiatr Res 24:58-73. 2015
    ..The screening instrument was successful in selecting a sub-sample with "high risk" for developing mental disorders. This study may help advance the field of child psychiatry and ultimately provide useful clinical information...
  30. pmc Evaluation of pattern recognition and feature extraction methods in ADHD prediction
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC Santo Andre, Brazil Laboratório Interdisciplinar de Neurociências Clínicas, Department of Psychiatry, Universidade Federal de São Paulo São Paulo, Brazil Instituto Nacional de Psiquiatria do Desenvolvimento São Paulo, Brazil
    Front Syst Neurosci 6:68. 2012
    ..TD controls and combined vs. inattentive), the relevant information is not confined only to a small set of regions but it is spatially distributed across the whole brain...
  31. doi request reprint Gene-Environment Interaction in Youth Depression: Replication of the 5-HTTLPR Moderation in a Diverse Setting
    Thiago Botter Maio Rocha
    From the Department of Psychiatry, Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Brazil the Department of Genetics, Universidade Federal do Rio Grande do Sul, Brazil the Department of Basic Health Sciences Universidade Federal de Ciências da Saúde de Porto Alegre the Department of Psychiatry, Universidade de Sao Paulo, Brazil the Center of Mathematics Computation and Cognition, Universidade Federal do ABC, Brazil the Postgraduate Program in Epidemiology, Universidade Federal de Pelotas, Brazil and the National Institute for Developmental Psychiatry for Children and Adolescents, Brazil
    Am J Psychiatry 172:978-85. 2015
    ..The authors sought to replicate a 2003 study on G×E in youth depression in a large birth cohort from a diverse setting...
  32. doi request reprint Motor Readiness Increases Brain Connectivity Between Default-Mode Network and Motor Cortex: Impact on Sampling Resting Periods from fMRI Event-Related Studies
    Paulo Rodrigo Bazán
    1 NIF LIM 44, Departamento de Radiologia, Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo, Sao Paulo, Brazil
    Brain Connect 5:631-40. 2015
    ..Therefore, connectivity studies using task-based fMRI to probe DMN should consider the influence of motor system modulation when interpreting the results. ..
  33. doi request reprint ACE I/D genotype-related increase in ACE plasma activity is a better predictor for schizophrenia diagnosis than the genotype alone
    Ary Gadelha
    Programa de Esquizofrenia PROESQ Departamento de Psiquiatria, UNIFESP, Sao Paulo, Brazil
    Schizophr Res 164:109-14. 2015
    ..Here the ACE activity of SCZ patients and healthy controls (HCs), and its possible correlations with the ACE polymorphism genotype and symptomatic dimensions, was investigated...
  34. pmc Abnormal functional resting-state networks in ADHD: graph theory and pattern recognition analysis of fMRI data
    Anderson dos Santos Siqueira
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC, Avenida dos Estados 5001, 09210 580 Santo André, SP, Brazil
    Biomed Res Int 2014:380531. 2014
    ..We concluded that the functional connectivity estimations are strongly dependent on the sample characteristics. Thus different acquisition protocols and clinical heterogeneity decrease the predictive values of the graph descriptors. ..
  35. doi request reprint Evaluation of neurotransmitter receptor gene expression identifies GABA receptor changes: a follow-up study in antipsychotic-naïve patients with first-episode psychosis
    Vanessa Kiyomi Ota
    Genetics Division, Department of Morphology and Genetics, Universidade Federal de Sao Paulo UNIFESP, Rua Botucatu, 740, Edifício Leitão da Cunha, 1 andar, CEP 04023 900, Sao Paulo, Brazil LiNC Interdisciplinary Laboratory of Clinical Neurosciences, Universidade Federal de Sao Paulo UNIFESP, Rua Pedro de Toledo, 669, 3 andar fundos, CEP 05039 032, Sao Paulo, Brazil Electronic address
    J Psychiatr Res 56:130-6. 2014
    ..Thus, it is important to consider that antipsychotics or the progression of psychotic disorders might interfere with gene expression...
  36. pmc Measuring abnormal brains: building normative rules in neuroimaging using one-class support vector machines
    Joao Ricardo Sato
    Center of Mathematics, Computation and Cognition, Universidade Federal do ABC Santo Andre, Brazil
    Front Neurosci 6:178. 2012
    ..We provide an intuitive description of basic concepts in one-class classification, the foundations of OC-SVM, current applications, and discuss how this tool can bring new insights to neuroimaging studies...
  37. doi request reprint Improved detection of incipient vascular changes by a biotechnological platform combining post mortem MRI in situ with neuropathology
    Lea Tenenholz Grinberg
    Aging Brain Project, Department of Pathology, University of Sao Paulo Medical School, Av Dr Arnaldo 455, sala 1353 01246903, Sao Paulo, SP, Brazil
    J Neurol Sci 283:2-8. 2009
    ..This protocol will greatly facilitate a systematic study of the location, pathogenesis, clinical impact, prognosis and prevention of WMHs...