Publications
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Journal Articles
2024 | Human Brain Mapping
Distinct oscillatory patterns differentiate between segregation and integration processes in perceptual grouping
G. N. Costa, M. Schaum, J. V. Duarte, R. Martins, I. C. Duarte, J. Castelhano, M. Wibral, M. Castelo-Branco
2023 | Journal of Clinical Medicine
Brain Hemispheric Asymmetry in Schizophrenia and Bipolar Disorder
D. Pinto, R. Martins, A. Macedo, M. Castelo-Branco, J. V. Duarte, N. Madeira
2023 | Brain Communications
Textural properties of microglial activation in Alzheimer’s disease as measured by (R)-[11C]PK11195 PET
M. L. Pais, L. Jorge, R. Martins, N. Canário, A. C. Xavier, R. Bernardes, A. Abrunhosa, I. Santana, M. Castelo-Branco
2023 | Hippocampus
Associations between cortical β-amyloid burden, fornix microstructure and cognitive processing of faces, places, bodies and other visual objects in early Alzheimer's disease
J. Bourbon-Teles, L. Jorge, N. Canário, R. Martins, I. Santana, M. Castelo-Branco
2022 | Communications Biology
Dual PET-fMRI reveals a link between neuroinflammation, amyloid binding and compensatory task-related brain activity in Alzheimer’s disease
N. Canário*, L. Jorge*, R. Martins, I. Santana, M. Castelo-Branco
2021 | NeuroImage Clinical
A Fundamental Distinction in Early Neural Processing of Implicit Social Interpretation in Schizophrenia and Bipolar Disorder
N. Madeira*, R. Martins*, J. V. Duarte, G. N. Costa, A. Macedo, M. Castelo-Branco
2021 | Journal of Neural Engineering
Automatic classification of idiopathic Parkinson's disease and atypical parkinsonian syndromes combining [11C]raclopride PET uptake and MRI grey matter morphometry
R. Martins, F. Oliveira, F. Moreira, A. P. Moreira, A. Abrunhosa, C. Januário, M. Castelo-Branco
2021 | Human Brain Mapping
The dual nature of the BOLD signal - Responses in visual area hMT+ reflect both input properties and perceptual decision
T. Sousa, J. V. Duarte, G. N. Costa, V. Kemper, R. Martins, R. Goebel, M. Castelo-Branco
2021 | Journal of Alzheimer's Disease
Investigating the Spatial Associations Between Amyloid-β Deposition, Grey Matter Volume, and Neuroinflammation in Alzheimer’s Disease
L. Jorge, R. Martins, N. Canário, C. Xavier, A. Abrunhosa, I. Santana, M. Castelo-Branco
2020 | Neural Plasticity
The Retinal Inner Plexiform Synaptic Layer Mirrors Grey Matter Thickness of Primary Visual Cortex with Increased Amyloid β Load in Early Alzheimer’s Disease
L. Jorge, N. Canário, R. Martins, B. Santiago, I. Santana, H. Quental, F. Ambrósio, R. Bernardes, M. Castelo-Branco
2020 | NeuroImage
Identification of competing neural mechanisms underlying positive and negative perceptual hysteresis in the human visual system
A. S. Campos*, T. Sousa*, J.V. Duarte, G.N. Costa, R. Martins, M. Castelo-Branco
2020 | NeuroImage Clinical
Morphometry and gyrification in bipolar disorder and schizophrenia - a comparative MRI study
J.V. Duarte*, N. Madeira*, R. Martins, G.N. Costa, A. Macedo, M. Castelo-Branco
2019 | Scientific Reports
Tracking perceptual decision mechanisms through changes in interhemispheric functional connectivity in human visual cortex
T. Sousa, J. V. Duarte, G. N. Costa, V. Kemper, R. Martins, R. Goebel, M. Castelo-Branco
2018 | NeuroImage
Evidence for distinct levels of neural adaptation to both coherent and incoherently moving visual surfaces in visual area hMT+
T. Sousa*, A. S. Campos*, J.V. Duarte, G.N. Costa, R. Martins, M. Castelo-Branco
2017 | Human Brain Mapping
Pivotal role of hMT+ in long‐range disambiguation of interhemispheric bistable surface motion
J.V. Duarte, G.N. Costa, R. Martins, M. Castelo-Branco
2017 | Journal of Cognitive Neuroscience
Interhemispheric binding of ambiguous visual motion is associated with changes in beta oscillatory activity but not with gamma range synchrony
G.N. Costa, J.V. Duarte, R. Martins, M. Wibral, M. Castelo-Branco
2017 | Neurocomputing
Integration of touch attention mechanisms to improve the robotic haptic exploration of surfaces
R. Martins, J. F. Ferreira, M. Castelo-Branco, J. Dias
2014 | Robotics and Autonomous Systems
Extracting Data from Human Manipulation of Objects Towards Improving Autonomous Robotic Grasping
Diego R. Faria, Ricardo Martins, Jorge Lobo, Jorge Dias
Book Chapters
2021 | Progress in Brain Research
Effects of anodal multichannel transcranial direct current stimulation (tDCS) on social-cognitive performance in healthy subjects - A randomized sham-controlled crossover pilot study
H. C. Pereira, D. Sousa, M. Simões, R. Martins, C. Amaral, V. Lopes, J. Crisóstomo, M. Castelo-Branco
2012 | IFAC Proceedings Volumes (10th IFAC Symposium on Robot Control)
A Probabilistic Framework to Detect Suitable Grasping Regions on Objects
D. R. Faria, R. Martins, J. Lobo, J. Dias
2011 | IFIP Advances in Information and Communication Technology (DoCEIS 2011)
Manipulative Tasks Identification by Learning and Generalizing Hand Motions
Diego Faria, Ricardo Martins, Jorge Lobo, Jorge Dias
2010 | IFIP Advances in Information and Communication Technology (DoCEIS 2010)
Grasp Exploration for 3D Object Shape Representation using Probabilistic Map
Diego R. Faria, Ricardo Martins, Jorge Dias
2008 | Lecture Notes in Computer Science (ICANN 2008)
Towards Personalized Neural Networks for Epileptic Seizure Prediction
António Dourado, Ricardo Martins, João Duarte, Bruno Direito
Conference Papers
2014 | IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2014)
Touch attention Bayesian models for robotic active haptic exploration of heterogeneous surfaces
R. Martins, J. F. Ferreira, J. Dias
2012 | ACM/IEEE International Conference on Human Robot Interaction (HRI2012)
Representation framework of perceived object softness characteristics for active robotic hand exploration
Ricardo Martins, Diego R. Faria, Jorge Dias
2012 | International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering (MaxEnt 2012)
Touch attention Bayesian models for object feature extraction in robotic blind manipulation
R. Martins, J. F. Ferreira, J. Dias
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2010 | IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2010)
Probabilistic Representation of 3D Object Shape by In-Hand Exploration
Diego R. Faria, Ricardo Martins, Jorge Lobo, Jorg
2010 | IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2010 - Workshop on Grasping Planning and Task Learning by Imitation)
Symbolic Level Generalization of In-hand Manipulation Tasks from Human Demonstrations using Tactile Data Information
Ricardo Martins, Diego R. Faria, Jorge Dias
2010 | IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2010 - Workshop on Grasping Planning and Task Learning by Imitation)
Learning Motion Patterns from Multiple Observations along the Actions Phases of Manipulative Tasks
Diego R. Faria, Ricardo Martins, Jorge Dia
2009 | Robotics Science and Systems (RSS 2009, Workshop Understanding the Human Hand for Advancing Robotic Manipulation)
Human reach-to-grasp generalization strategies - a Bayesian approach
Diego R. Faria, Ricardo Martins, Jorge Dias
2008 | Epilepsia (8th European Congress on Epileptology)
Computational Intelligence Algorithms for Seizure Prediction
Bruno Direito, Ricardo Martins, Rui Costa, António Dourado, Francisco Sales, Marco Vieira
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Conference Abstracts
November 22 - November 25, 2023 | XVII Portuguese National Congress of Psychiatry
Teoria da Mente implícita na Esquizofrenia e Doença Bipolar - padrões cerebrais distintivos de conetividade funcional
R. Martins, N. Madeira, J. V. Duarte, A. Macedo, M. Castelo-Branco
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October 24 - October 27, 2023 | CRSy23 - Champalimaud Research Symposium 2023
Distinct functional connectivity patterns in dopaminergic and limbic pathways underlying task-based implicit Theory of Mind in Schizophrenia and Bipolar Disorder
R. Martins, J. V. Duarte, N. Madeira, A. Macedo, M. Castelo-Branco
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October 24 - October 27, 2023 | CRSy23 - Champalimaud Research Symposium 2023
Distinct oscillatory patterns differentiate between segregation and integration processes in perceptual grouping
G. N. Costa, M. Schaum, J. V. Duarte, R. Martins, J. Castelhano, M. Wibral, M. Castelo-Branco
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May 3 - May 6, 2023 | INSAR meeting 2023 - International Society for Autism Research
Synaptic density marker, SV2A, is reduced in autistic adults
C. Mehra, E. Onwordi; B. Kowalewska, T. Whitehurst, E. Shatalina, G. Griffioen, R. Martins, M. Petrinovic, S. Mouga, A. Abrunhosa, A. Rodrigues, I. Kadiu, J. Borg, M. Castelo-Branco, S. Natesan, J. Muircheartaigh, O. Howes, D. Murphy
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May 3 - May 5, 2023 | FRM 2023 - Federation of European Neuroscience Societies, Regional Meeting
A structural MRI study of cortical complexity features of major depression, schizophrenia, and bipolar disorder
J. V. Duarte, R. Martins, N. Madeira, K. Young, A. Macedo, M. Castelo-Branco
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December 16, 2022 | CIBIT meeting 2022 - Coimbra Institute for Biomedical Imaging and Translational Research
Nervous system plasticity in stroke - functional magnetic resonance and PET
M. S. Ferreira, O. C. d'Almeida, H. Quental, R. Martins, J. Lemos, A. Jorge, M. Castelo-Branco
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April 6 - April 9, 2022 | 13th Symposium of the BIAL Foundation “Behind and Beyond the Brain”
The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
M. Castelo-Branco, T. Sousa, J. V. Duarte, R. Martins, G. Costa
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October 20 - October 23, 2021 | European Journal of Nuclear Medicine and Molecular Imaging - Conference Abstract - Annual Congress of the European Association of Nuclear Medicine (EANM2021), online
Texture Quantification Parameters for Alzheimer's disease diagnosis measured by 11C- (R)- PK11195 PET images
M. Lapo Pais, L. Jorge, R. Martins, N. Canário, C. Xavier, A. Abrunhosa, I. Santana, R. Bernardes, M. Castelo-Branco
May 30 - June 1, 2019 | Frontiers in Cellular Neuroscience - Conference Abstract - XVI Meeting of the Portuguese Society for Neuroscience (SPN2019), Lisbon, Portugal
Studying the neuronal mechanisms underlying bistable perception - the role of adaptation, persistence, and inhibition on perceptual decision
T. Sousa, A. S. Campos, J. V. Duarte, G. N. Costa, R. Martins, M. Castelo-Branco
May 30 - June 1, 2019 | Frontiers in Cellular Neuroscience - Conference Abstract - XVI Meeting of the Portuguese Society for Neuroscience (SPN2019), Lisbon, Portugal
Investigating whole-brain MRI markers in neuropsychiatric disorders – separating disease duration from medication effects in schizophrenia and bipolar disorder
J.V. Duarte, N. Madeira, R. Martins, G.N. Costa, A. Macedo, M. Castelo-Branco
July 10-13, 2019 | Federation of European Neuroscience Societies Regional meeting (FRM 2019), Belgrade, Serbia
Distinct roles of beta and gamma oscillations during integration of ambiguous motion
G.N. Costa, Schaum, R. Martins, J.V. Duarte, J. Castelhano, M. Wibral, M. Castelo-Branco
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July 10-13, 2019 | Federation of European Neuroscience Societies Regional meeting (FRM 2019), Belgrade, Serbia
Investigating whole-brain MRI markers in neuropsychiatric disorders – emerging dimensions in morphometric space
J.V. Duarte, N. Madeira, R. Martins, G.N. Costa, A. Macedo, M. Castelo-Branco
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June 17-21, 2018 | 24th Annual Meeting of the Organization for Human Brain Mapping (OHBM 2018), Singapore
Evidence for asymmetric perceptual adaptation to coherent and incoherent moving plaids
T. Sousa, A. S. Campos, J. V. Duarte, G. N. Costa, R. Martins, M. Castelo-Branco
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July 7-11, 2018 | 11th FENS Forum of Neuroscience (FENS 2018), Berlin, Germany
Unraveling the neural correlates of perceptual hysteresis - the effects of perceptual history on the visual perception of an ambiguous stimulus
A. S. Campos, T. Sousa, J.V. Duarte, G.N. Costa, R. Martins, M. Castelo-Branco
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July 12-13, 2018 | Salzburg Mind-Brain Annual Meeting (SAMBA 2018), Salzburg, Austria
Unraveling the neural correlates of perceptual hysteresis - the effects of perceptual history on the visual perception of an ambiguous stimulus
A. S. Campos, T. Sousa, J.V. Duarte, G.N. Costa, R. Martins, M. Castelo-Branco
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July 12-13, 2018 | Salzburg Mind-Brain Annual Meeting (SAMBA 2018), Salzburg, Austria
Evidence for distinct levels of neural adaptation to both coherent and incoherently moving visual surfaces in visual area hMT+
T. Sousa, A. S. Campos, J.V. Duarte, G.N. Costa, R. Martins, M. Castelo-Branco
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August 5-8, 2017 | 13th International Conference for Cognitive Neuroscience, Amsterdam, Netherland
Long-range interhemispheric binding of bistable surface motion reflects bottom-up processes generated within hMT+
J. V. Duarte, G. N. Costa, R. Martins, M. Castelo-Branco
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August 5-8, 2017 | 13th International Conference for Cognitive Neuroscience, Amsterdam, Netherland
Beta oscillations reflect perceptual experience under ambiguous stimulation but not in the absence of conflict
G. N. Costa, J. V. Duarte, R. Martins, M. Castelo-Branco
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August 5-8, 2017 | 13th International Conference for Cognitive Neuroscience, Amsterdam, Netherland
The Perceptual Integration of Visual Motion Revealed by hMT+ Interhemispheric Connectivity - a 7 Tesla study
T. Sousa, V. Kemper, G. N. Costa, J. V. Duarte, R. Martins, R. Goebel, M. Castelo-Branco
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July 6-7, 2017 | 7th Iberian Congress on Perception, Coimbra, Portugal
Maintenance of perceptual stability of interhemispheric surface motion is associated with bottom-up influences generated within hMT+
João V. Duarte, Gabriel N. Costa, Ricardo Martins, Miguel Castelo-Branco
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July 6-7, 2017 | 7th Iberian Congress on Perception, Coimbra, Portugal
High-resolution 7T fMRI data on the perceptual long-range segregation vs. integration of bistable moving stimuli
T. Sousa, J. V. Duarte, G. N. Costa, V. Kemper, R. Martins, R. Goebel, M. Castelo-Branco
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July 6-7, 2017 | 7th Iberian Congress on Perception, Coimbra, Portugal
Study of motion adaptation and its role in deciding between competing surface representations
A. S. Campos, T. Sousa, J. V. Duarte, G. N. Costa, R. Martins, M. Castelo-Branco
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July 6-7, 2017 | 7th Iberian Congress on Perception, Coimbra, Portugal
Beta oscillations during motion integration and segmentation - evidence of binding or perceptual bias?
Gabriel N. Costa, João V. Duarte, Ricardo Martins, Michael Wibral, Miguel Castelo-Branco
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June 26-30, 2016 | 22nd Annual Meeting of the Organization for Human Brain Mapping (OHBM 2016), Geneva, Switzerland
Binding of ambiguous visual stimuli is associated with changes in beta power but not with synchrony
G. N. Costa, J. V. Duarte, R. Martins, M. Wibral, M. Castelo-Branco
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June 26-30, 2016 | 22nd Annual Meeting of the Organization for Human Brain Mapping (OHBM 2016), Geneva, Switzerland
Long-range perceptual integration of visual motion revealed at high resolution 7T fMRI
T. Sousa, V. Kemper, G. Costa, J. V. Duarte, R. Martins, R. Goebel, M. Castelo-Branco
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December 3-4, 2015 | V IBILI Meeting, Coimbra, Portugal
Perceptual interpretation of visual motion revealed at high resolution 7T fMRI - differential modulation of neural population activity
T. Sousa, G.N. Costa, J. V. Duarte, R. Martins, V. Kemper, R. Goebel, M. Castelo-Branco
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September 10-12, 2015 | Annual Conference on Clinical Neurophysiology and Neuroimaging, Munich, Germany
Increased synchrony correlates with visual binding - a study on visual integration on healthy subjects and schizophrenic patients
G.N. Costa, J. V. Duarte, R. Martins, N. Madeira, M. Castelo-Branco
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December 11-12, 2014 | IV IBILI meeting, Coimbra, Portugal
Perceptual motion integration correlates with long range neural synchrony - a study on the temporal binding hypothesis
G.N. Costa, J. V. Duarte, M.Intaite, R. Martins, M. Castelo-Branco
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August 30, 2013 | 2nd Workshop on Recognition and Action for Scene Understanding (REACTS) 2013, York, UK
Touch attention Bayesian models for robotic active haptic exploration
Ricardo Martins, J. F. Ferreira, J. Dias
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Thesis and Dissertations
2017 | PhD thesis, University of Coimbra
Development of techniques for haptic exploration and recognition of objects - a contribution to autonomous robotic hands
R. Martins
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2008 | MSc Thesis, University of Coimbra, Internship at Blueworks Lda
BW-Eye - Ophthalmologic decision support system based on clinical workflow and data mining techniques-image registration algorithm
R. Martins
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