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BIAL Foundation
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DE:"Granger causality analysis"
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DocumentFinal report - Multimodal mapping of visual motion perceptual decision: Dissecting the role of different motion integration areas in visual surface reconstruction2017

Reference code: PT/FB
Entity holding: BIAL Foundation
Location: S. Mamede do Coronado
Title:
BIAL Foundation Archive
Start date: 1994
History:
The BIAL Foundation was created in 1994 by Laboratórios BIAL in conjunction with the Council of Rectors of Portuguese Universities. BIAL’s Foundation mission is to foster the scientific study of Man from both the physical and spiritual perspectives.
Along the years the BIAL Foundation has developed an important relationship with the scientific community, first in Portugal and after worldwide. Today it is an institution of reference which aims to stimulate new researches that may help people, promote more health and contribute to new milestones to gain access to knowledge.
Among its activities the BIAL Foundation manages the BIAL Award, created in 1984, one of the most important awards in the Health field in Europe. The BIAL Award rewards both the basic and the clinical research distinguishing works of major impact in medical research.
The BIAL Foundation also assigns Scientific Research Scholarships for the study of neurophysiological and mental health in people, arousing the interest of researchers in the areas of Psychophysiology and Parapsychology.
To date the BIAL Foundation has supported 461 projects, more than 1000 researchers, with research groups in twenty-seven countries, resulting, until April 2013, in about 600 full papers, out of which 172 published in indexed international journals with an average impact factor of 3.6 and a substantial number of citations (1665).
Since 1996 the BIAL Foundation organizes the Symposia entitled "Behind and Beyond the Brain", a Forum that gathers well renowned neurosciences speakers and the BIAL Foundation Fellows which are spread around the world.
Classified as an institution of public utility, the BIAL Foundation includes among its patrons the Portuguese President, the Portuguese Universities Rectors' Council and the Portuguese Medical Association.
URL: http://www.bial.com/pt/
Accessibility: By permission

Reference code: PT/FB/BL
Entity holding: BIAL Foundation
Title: BIAL Grants
Start date: 1994
History:
In 1994 the BIAL Foundation launched a programme of science research grants with the aim of encouraging the research into Man’s physical and mental processes, namely in fields still largely unexplored but which warrant further scientific analysis, as Psychophysiology and Parapsychology.
Since its launch, applications to the BIAL grants have been increasing. Up to now 461 projects have been supported, involving more than 1000 researchers from 27 countries.
The approved applications have benefited from grants in amounts comprised between €5,000 and €50, 000. The amount to be granted is fixed by the Scientific board according to the needs of each project.
The supported projects have originated, until April 2013, in about 600 full papers, 172 out of which were published in indexed international journals with an average impact factor of 3.6 and a substantial number of citations (1665).
Among the BIAL Foundation fellows is worth highlighting the presence of scientists from prestigious universities from the United States, United Kingdom, Australia, Russia, Germany, Japan, France, Canada, and many others.
The BIAL grants are promoted biannually.

Reference code: PT/FB/BL-2014
Location: BF-GMS
Title:
2014 Grants
Start date: 2015-01

Reference code: PT/FB/BL-2014-373
Location: BF-GMS
Title:
373 - Multimodal Mapping of Visual Motion Perceptual Decision: Dissecting the Role of Different Motion Integration Areas in Visual Surface Reconstruction
Duration: 2016-02 - 2017-10
Researcher(s):
Miguel de Sá e Sousa de Castelo Branco, Gabriel Nascimento Ferreira da Costa, Gilberto Silva, João Valente Duarte, Ricardo Martins
Institution(s): ICNAS - Institute for Nuclear Sciences Applied to Health, Coimbra, Portugal; IBILI - Institute for Biomedical Imaging and Life Sciences, Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Progress report
Final report
Articles
Author: Castelo-Branco, M.
Secondary author(s):
Costa, G., Silva, G., Duarte, J., Martins, R.
Number of reproductions:
1
Keywords:
Motion perception / Decision-making / Perceptual Ambiguity / Decision Models / Psychophysiology

Reference code: PT/FB/BL-2014-373.01
Location: BF-GMS
Title:
Final report - Multimodal mapping of visual motion perceptual decision: Dissecting the role of different motion integration areas in visual surface reconstruction
Publication year: 2017
URL:
https://www.bial.com/imagem/Grant_37314.pdf
Abstract/Results: ABSTRACT:
BACKGROUND
Neural models of perceptual decision are often studied using bistable perceptual decision paradigms. Causal bottom vs top-down mechanisms remain to be elucidated.
AIMS
We asked whether hMT+ is pivotal for perceptual integration of motion signals in terms of bottom-up vs top-down interactions. Moreover, if middle temporal cortex (hMT+) is indeed a causal hub in the decision-making network, then it should also provide long range integration at the interhemispheric level, which is a testable prediction. We tested whether one can find fingerprints of perception related to neural coherence. Finally, we aimed to elucidate the general relation between sensory and decision modules within saliency and frontoparietal networks.
METHOD
We combined EEG and fMRI methods, to understand perceptual decision mechanisms, their neural correlates and functional connectivity (with a focus on interhemispheric interactions).
RESULTS
We found out that human hMT+ is a causal hub which contributes to maintain perceptual representations when other competing percepts are available for cognition. We further confirmed the prediction that it should also subserve long range perceptual integration, through increased interhemispheric connectivity between left/right hMT+. EEG data revealed that bound perceptual interpretations relate with parietal beta power under ambiguous conditions. Together with our findings using other decision paradigms inside and outside the visual domain, we showed a modular architecture of perceptual decision-making network.
CONCLUSION
Our work provides a clear-cut functional segregation at different time scales between sensory representations, and the role of the general decision modules within saliency and frontoparietal networks.
Accessibility: Document exists in file
Language:
eng
Author:
Castelo-Branco, M.
Document type:
Final report
Number of reproductions:
1
Indexed document:
No
Keywords: Perception / Decision-making / Electroencephalogram (EEG) / Functional magnetic resonance imaging (fMRI) / Granger causality analysis / Visual motion / Bistability

Final report - Multimodal mapping of visual motion perceptual decision: Dissecting the role of different motion integration areas in visual surface reconstruction

Final report - Multimodal mapping of visual motion perceptual decision: Dissecting the role of different motion integration areas in visual surface reconstruction