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File207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making2017-11

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology
DocumentThe role of prefrontal cortex in a battle of the sexes dilemma involving a conflict between tribal and romantic love2018

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.02
Location: BF-GMS
Title:
The role of prefrontal cortex in a battle of the sexes dilemma involving a conflict between tribal and romantic love
Publication year: 2018
URL:
https://www.nature.com/articles/s41598-018-30611-6
Abstract/Results: ABSTRACT:
The neural basis of dilemmas involving decisions with profound affective impact, such as in romantic life, remains to be understood. The “Battle of the Sexes” is a paradigm from Game Theory that can be used to experimentally address such dilemmas. A form of in-group love, tribal love in football fans, provides the opportunity to study strong affective dilemmas when tribal and romantic love compete for hedonic decision-making. Here, we used for the first time a “Battle of the Sexes” dilemma using fMRI. We investigated, in 44 male football fans, the neural correlates of cooperative behaviour under conflicting choices in the context of romantic versus tribal love. We identified a critical functional segregation of prefrontal regions in affective decision-making. The orbitofrontal cortex signalled emotional appraisal of the dilemma. The medial anterolateral and the ventromedial prefrontal cortices reflected reciprocal cooperation instead of selfish engagement in football-related activities. The lateral portion of anterolateral prefrontal cortex was recruited during ultimate deliberation. In sum, emotional appraisal and rational choice reflected a contiguous functional parcellation in anterolateral prefrontal cortex: appraisal (medial) vs. choice (lateral region).
Accessibility: Document exists in file
Language:
eng
Related objects:
BL-2014-373.20
Author: Duarte, I. C.
Secondary author(s):
Brito-Costa, S., Cayolla, R., Castelo-Branco, M.
Document type:
Article-d
Number of reproductions:
1
Reference:
Duarte, I. C., Brito-Costa, S., Cayolla, R., & Castelo-Branco, M. (2018). The role of prefrontal cortex in a battle of the sexes dilemma involving a conflict between tribal and romantic love. Scientific Reports, 8: 12133.
2-year Impact Factor: 4.011|2018
Times cited: 4|2024-02-09
Indexed document: Yes
Quartile: Q1

The role of prefrontal cortex in a battle of the sexes dilemma involving a conflict between tribal and romantic love

The role of prefrontal cortex in a battle of the sexes dilemma involving a conflict between tribal and romantic love
DocumentEvidence for distinct levels of neural adaptation to both coherent and incoherently moving visual surfaces in visual area hMT+2018

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.03
Location: BF-GMS
Title:
Evidence for distinct levels of neural adaptation to both coherent and incoherently moving visual surfaces in visual area hMT+
Publication year: 2018
URL:
https://www.sciencedirect.com/science/article/pii/S1053811918305822?via%3Dihub
Abstract/Results: ABSTRACT:
Visual adaptation describes the processes by which the visual system alters its operating properties in response to changes in the environment. It is one of the mechanisms controlling visual perceptual bistability – when two perceptual solutions are available – by controlling the duration of each percept. Moving plaids are an example of such ambiguity. They can be perceived as two surfaces sliding incoherently over each other or as a single coherent surface.
Here, we investigated, using fMRI, whether activity in the human motion complex (hMT+), a region tightly related to the perceptual integration of visual motion, is modulated by distinct forms of visual adaptation to coherent or incoherent perception of moving plaids. Our hypothesis is that exposure to global coherent or incoherent moving stimuli leads to different levels of measurable adaptation, reflected in hMT+ activity. We found that the strength of the measured visual adaptation effect depended on whether subjects integrated (coherent percept) or segregated (incoherent percept) surface motion signals.
Visual motion adaptation was significant both for coherent motion and globally incoherent surface motion. Although not as strong as to the coherent percept, visual adaptation due to the incoherent percept also affects hMT+. This shows that adaptation can contribute to regulate percept duration during visual bistability, with distinct weights, depending on the type of percept. Our findings suggest a link between bistability and adaptation mechanisms, both due to coherent and incoherent motion percepts, but in an asymmetric manner. These asymmetric adaptation weights have strong implications in models of perceptual decision and may explain asymmetry of perceptual interpretation periods.
Accessibility: Document does not exist in file
Language:
eng
Author:
Sousa, T.
Secondary author(s):
Sayal, A., Duarte, J. V., Costa, G., Martins, R., Castelo-Branco, M.
Document type:
Article
Number of reproductions:
1
Percentiles:
7
Reference:
Sousa, T., Sayal, A., Duarte, J. V., Costa, G., Martins, R., Castelo-Branco, M. (2018). Evidence for distinct levels of neural adaptation to both coherent and incoherently moving visual surfaces in visual area hMT+. NeuroImage, 179, 540-547. https://doi.org/10.1016/j.neuroimage.2018.06.075
2-year Impact Factor: 5.812|2018
Times cited: 4|2024-02-09
Indexed document: Yes
Quartile: Q1
Keywords: Bistable visual motion / Perceptual decision / Adaptation / Plaids / hMT+
DocumentTracking perceptual decision mechanisms through changes in interhemispheric functional connectivity in human visual cortex2019

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.04
Location: BF-GMS
Title:
Tracking perceptual decision mechanisms through changes in interhemispheric functional connectivity in human visual cortex
Publication year: 2019
URL:
https://www.nature.com/articles/s41598-018-37822-x
Abstract/Results: ABSTRACT:
The role of long-range integration mechanisms underlying visual perceptual binding and their link to interhemispheric functional connectivity, as measured by fMRI, remains elusive. Only inferences on anatomical organization from resting state data paradigms not requiring coherent binding have been achieved. Here, we used a paradigm that allowed us to study such relation between perceptual interpretation and functional connectivity under bistable interhemispheric binding vs. non-binding of visual surfaces. Binding occurs by long-range perceptual integration of motion into a single object across hemifields and non-binding reflects opponent segregation of distinct moving surfaces into each hemifield. We hypothesized that perceptual integration vs. segregation of surface motion, which is achieved in visual area hMT+, is modulated by changes in interhemispheric connectivity in this region. Using 7T fMRI, we found that perceptual long-range integration of bistable motion can be tracked by changes in interhemispheric functional connectivity between left/right hMT+. Increased connectivity was tightly related with long-range perceptual integration. Our results indicate that hMT+ interhemispheric functional connectivity reflects perceptual decision, suggesting its pivotal role on long-range disambiguation of bistable physically constant surface motion. We reveal for the first time, at the scale of fMRI, a relation between interhemispheric functional connectivity and decision based perceptual binding.
Accessibility: Document exists in file
Language:
eng
Related objects:
BL-2014-373.21
Author: Sousa, T.
Secondary author(s):
Duarte, J., Costa, G. N., Kemper, V. G., Martins, R., Goebel, R., Castelo-Branco, M
Document type:
Article-d
Number of reproductions:
1
Reference:
Sousa, T., Duarte, J., Costa, G. N., Kemper, V. G., Martins, R., Goebel, R., & Castelo-Branco, M. (2019). Tracking perceptual decision mechanisms through changes in interhemispheric functional connectivity in human visual cortex. Scientific Reports, 9, Article number: 1242. https://doi.org/10.1038/s41598-018-37822-x
2-year Impact Factor: 3.998|2019
Times cited: 2|2024-02-12
Indexed document: Yes
Quartile: Q1
Keywords: Functional connectivity / Binding / Integration / Motion

Tracking perceptual decision mechanisms through changes in interhemispheric functional connectivity in human visual cortex

Tracking perceptual decision mechanisms through changes in interhemispheric functional connectivity in human visual cortex
DocumentFinal report - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making2019

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.01
Title: Final report - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Publication year: 2019
Abstract/Results:
ABSTRACT
BACKGROUND AND AIMS
Studying the human brain response to shifts in perception provides an insight on the neuronal processes which underlie perceptual decision. Visual ambiguous stimuli are a powerful tool to investigate such processes, since perception varies over time despite the physically unchanging properties of stimuli.
A classic example of an ambiguous visual stimulus is when two moving gratings are superimposed to form a plaid. The perception of a moving plaid switches back and forth between two interpretations: it can be perceived as a single surface with coherent motion or as two surfaces sliding one over the other (incoherent motion). It has been suggested that this phenomenon arises from competition between opposing percepts, which might be influenced by mechanisms such as neuronal adaptation, inhibition, and memory. Current perceptual stability models consider bistable perception as a result of the interaction between these mechanisms, but the relative contribution of each one is still under debate.
METHODS
Here, using fMRI, EEG and behavioral approaches, we explore how each of these contributes to perceptual decision during bistable visual perception of moving plaids, taking into account the possible interaction between them. We hypothesized that the crucial role of adaptation in perceptual bistability arises from its influence on other mechanisms, such as perceptual persistence (a special form of short term visual memory) and inhibition.
Based on a set of three experiments, we first tested for distinct levels of adaptation during visual motion perceptual bistability. Then, we investigated how such adaptation competes with persistence to influence perceptual experience. Finally, we tested whether cross-inhibitory effects occur between bistable percepts of a moving plaid, elicited by adaptation.
RESULTS
We found that adaptation can contribute to regulating percept duration during visual bistability, with distinct weights, depending on the type of percept. Our results provide further evidence for continuous competition between adaptation and persistence, the first leading to negative and the second to positive hysteresis, with a relevant role for perceptual experience. Finally, we demonstrated, both at the behavioral and neuronal level, that inhibition across neural populations plays a key role in the disambiguation of moving plaids.
CONCLUSION
Taken together, our findings add to the understanding of how the visual system achieves perceptual decisions based on interactions between low and high-level neuronal mechanisms, one based on adaptation and the second on short-term visual memory (persistence).
Accessibility: Document exist in file
Language:
eng
Author:
Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Document type:
Final report
Number of reproductions:
1
Reference:
Castelo-Branco, M., Duarte, J., Martins, R., Sousa, T., & Costa, G. (2019). Final report - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making.
Indexed document: No
Keywords: Adaptation / Short-term memory / Ambiguous visual motion / Perceptual bistability / Perceptual decision / Visual motion integration / fMRI
DocumentThe role of the insula in intuitive expert bug detection in computer code: an fMRI study2019

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.05
Location: BF-GMS
Title:
The role of the insula in intuitive expert bug detection in computer code: an fMRI study
Publication year: 2019
URL:
https://link.springer.com/article/10.1007/s11682-018-9885-1#citeas
Abstract/Results: ABSTRACT:
Software programming is a complex and relatively recent human activity, involving the integration of mathematical, recursive thinking and language processing. The neural correlates of this recent human activity are still poorly understood. Error monitoring during this type of task, requiring the integration of language, logical symbol manipulation and other mathematical skills, is particularly challenging. We therefore aimed to investigate the neural correlates of decision-making during source code understanding and mental manipulation in professional participants with high expertise. The present fMRI study directly addressed error monitoring during source code comprehension, expert bug detection and decision-making. We used C code, which triggers the same sort of processing irrespective of the native language of the programmer. We discovered a distinct role for the insula in bug monitoring and detection and a novel connectivity pattern that goes beyond the expected activation pattern evoked by source code understanding in semantic language and mathematical processing regions. Importantly, insula activity levels were critically related to the quality of error detection, involving intuition, as signalled by reported initial bug suspicion, prior to final decision and bug detection. Activity in this salience network (SN) region evoked by bug suspicion was predictive of bug detection precision, suggesting that it encodes the quality of the behavioral evidence. Connectivity analysis provided evidence for top-down circuit “reutilization” stemming from anterior cingulate cortex (BA32), a core region in the SN that evolved for complex error monitoring such as required for this type of recent human activity. Cingulate (BA32) and anterolateral (BA10) frontal regions causally modulated decision processes in the insula, which in turn was related to activity of math processing regions in early parietal cortex. In other words, earlier brain regions used during evolution for other functions seem to be reutilized in a top-down manner for a new complex function, in an analogous manner as described for other cultural creations such as reading and literacy.
Accessibility: Document exists in file
Language:
eng
Author:
Castelhano, J.
Secondary author(s):
Duarte, I. C., Ferreira, C., Duraes, J., Madeira, H., Castelo-Branco, M.
Document type:
Article
Number of reproductions:
1
Percentiles:
5
Reference:
Castelhano, J., Duarte, I. C., Ferreira, C., Duraes, J., Madeira, H., & Castelo-Branco, M. (2019). The role of the insula in intuitive expert bug detection in computer code: an fMRI study. Brain Imaging and Behavior, 3(3), 623-637. https://doi.org/10.1007/s11682-018-9885-1
2-year Impact Factor: 3.391|2019
Times cited: 34|2024-02-12
Indexed document: Yes
Quartile: Q2
Keywords: fMRI / Brain mapping / Insula / Informatics / Error monitoring / Salience network / Computer code understanding

The role of the insula in intuitive expert bug detection in computer code: an fMRI study

The role of the insula in intuitive expert bug detection in computer code: an fMRI study
DocumentHow positive emotional content overrules perceptual history effects: Hysteresis in emotion recognition2020

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.10
Location: BF-GMS
Title:
How positive emotional content overrules perceptual history effects: Hysteresis in emotion recognition
Publication year: 2020
URL:
https://jov.arvojournals.org/article.aspx?articleid=2770662
Abstract/Results: ABSTRACT:
The human visual system is constantly processing multiple and often conflicting sensory cues to make perceptual decisions. Given the nonlinear nature of emotion recognition, this often leads to different percepts of the same physical facial expression. Moreover, the state of the emotion recognition system might depend on the trajectory of temporal context, potentially leading to a phenomenon known as perceptual hysteresis. Here, we aimed to explore temporal context-related mechanisms underlying perceptual hysteresis during emotion recognition. We hypothesized that dependence on recent perceptual experience might reveal important clues about the role of short-term memory on the perception of emotional stimuli. Behavioral data were acquired using reality-based, changing emotion expressions morphed from a source to a target emotion with different valences, always passing through a neutral expression. Participants identified the onset and offset of what they perceived as the neutral expression interval. Our results showed that current perception of emotional expression is affected by recent temporal context, thus revealing perceptual hysteresis. We also found a relation between recent perceptual history effects and stimulus emotional Content: The positive valence of the stimulus emotional content appeared to abolish perceptual history effects, whereas negatively loaded stimuli induced clear short-term memory effects and positive hysteresis. Our findings show direct competition between recent perceptual experience and stimulus emotional content during decision making, which affects the formation of current percepts in emotion recognition.
Accessibility: Document exists in file
Language:
eng
Author:
Verdade, A.
Secondary author(s):
Castelhano, J., Sousa, T., Castelo-Branco, M.
Document type:
Article
Number of reproductions:
1
Percentiles:
7
Reference:
Verdade, A., Castelhano, J., Sousa, T., & Castelo-Branco, M. (2020). How positive emotional content overrules perceptual history effects: Hysteresis in emotion recognition. Journal of Vision, 20(8):19. https://doi.org/10.1167/jov.20.8.19
2-year Impact Factor: 2.240|2020
Times cited: 3|2024-02-12
Indexed document: Yes
Quartile: Q3
Keywords: Dynamic emotion recognition / Temporal context / Perceptual hysteresis / Perceptual memory / Emotional valence

How positive emotional content overrules perceptual history effects: Hysteresis in emotion recognition

How positive emotional content overrules perceptual history effects: Hysteresis in emotion recognition
DocumentThe role of the insula in intuitive expert bug detection in computer code: an fMRI study2019

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.06
Location: BF-GMS
Title:
The role of the insula in intuitive expert bug detection in computer code: an fMRI study
Publication year: 2019
URL:
https://www.abstractsonline.com/pp8/#!/4649/presentation/6935
Abstract/Results: ABSTRACT:
Perception of biological motion is important for daily life activities, such as non-verbal communication. Understanding how the visual system perceives biological motion, even from point-light displays depicting human activity, remains a neuroscientific challenge. The mechanisms that allow us to interpret biological motion from the local motion of individual dots, which is characteristic for the local motion of parts of living beings and can be defined as life motion, are largely unknown. The functional separation into distinct neural stages of the correlates of the perception of life motion from perception of global motion of a coherent body bearing multiple articulated joints remains to be achieved. We hypothesized that life motion processing can be separated, by using a single dot motion paradigm featuring the biomechanical details of local realistic motion of a single joint. Equipped with such a paradigm, we studied the neural correlates of life motion perception. Low level visual areas, such as the human hMT+ complex, are known to respond to simple and variable motion patterns. To investigate if this region also responds to biological motion paths that a given center of gravity undergoes through space, we manipulated the constraints imposed by gravity and inertial forces on acceleration/deceleration patterns of foot motion, by mapping realistic foot movement on a single dot motion stimulus. We therefore developed an event-related fMRI experiment to study the neural basis of life motion perception from a single moving dot embedding the kinematic properties of local feet motion that only contained local properties. We could isolate more low-level (life motion) aspects of biological motion processing from aspects related to social perception of animated shapes. We hypothesized that such local biological motion computation is achieved in hMT+ by assessing, using BOLD fMRI, the neural correlates underlying the decision the decision whether local instantaneous acceleration patterns were truly biological or not. We found that hMT+ is sensitive to signals that encode life motion (local biological motion), which places this region in the initial biological motion processing network.
Accessibility: Document does not exist in file
Language:
eng
Author:
Duarte, I. C.
Secondary author(s):
Aragão, B., Snatos, J. A., Castelo-Branco, M.
Document type:
Online abstract
Number of reproductions:
1
Reference:
Duarte, I. C., Aragão, B., Snatos, J. A., & Castelo-Branco, M. (2018, November). Human MT+ is sensitive to the dynamics of motion of a single dot representing or violating the biological motion of real human walkers. Program No. 307.04. 2018 Neuroscience Meeting Planner. San Diego, CA: Society for Neuroscience, 2018. Online.
Indexed document: No
Keywords: Life motion / fMRI
DocumentT2.07 The role of perceptual history and its interaction with stimulus valence on face emotion recognition2019

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.07
Location: BF-GMS
Title:
T2.07 The role of perceptual history and its interaction with stimulus valence on face emotion recognition
Publication year: 2019
Institution(s):
http://eventos.ucm.es/_files/_event/_26555/_editorFiles/file/Book%20CIP%202019.pdf
Contents: ABSTRACT:
The recognition of facial expressions in real-time contexts is inherently dynamic. Due to its nonlinear nature, the perception of emotions might lead to different perceptual interpretations of the same facial expression depending on the previous experience. We hypothesize that this timebased dependence of the emotion recognition system results from perceptual hysteresis. This theoretical account might provide an estimation of the contribution of memory mechanisms to the current percept at different time-scales. Here, we aimed to explore temporal context-related mechanisms underlying perceptual hysteresis on the recognition of dynamic emotional facial expressions. We used realistic expression transitions from a source to a target emotion with different valences, always passing through a neutral expression. Three pairs of emotions were used to design the dynamic transitions: anger-happiness, sadness-anger, and sadness-happiness. Psychophysical data were acquired from 20 participants, who were asked to identify the onset and offset of what they perceived as a neutral expression interval. Our results revealed the existence of temporal context effects on the recognition of dynamic emotions, thus revealing perceptual hysteresis. Importantly, we also found a relation between stimulus emotional content and perceptual history effects: negative valence stimulus content appeared to overrule recent perceptual experience effects, stored in short-term memory. As such, we suggest that recent perceptual experience affects the recognition of facial expressions by modulating short-term visual memory contributions to perceptual interpretation of emotional stimuli.
Abstract/Results: Document exists in file
Language: eng
Author:
Verdade, A.
Secondary author(s):
Castelhano, J., Sousa, T., Castelo-Branco, M.
Document type:
Abstract book
Number of reproductions:
1
Reference:
Verdade, A., Castelhano, J., Sousa, T., & Castelo-Branco, M. (2018, June). T2.07 The role of perceptual history and its interaction with stimulus valence on face emotion recognition. 8TH Iberian Conference on Perception (p. 32). San Lorenzo de El Escorial, Spain.
Indexed document: No
Keywords: Facial expressions / Recognition / Perceptual hysteresis

T2.07 The role of perceptual history and its interaction with stimulus valence on face emotion recognition

T2.07 The role of perceptual history and its interaction with stimulus valence on face emotion recognition
DocumentT3.02 Neural responses underlying the interaction between competing perceptual states2019

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.08
Location: BF-GMS
Title:
T3.02 Neural responses underlying the interaction between competing perceptual states
Publication year: 2019
URL:
http://eventos.ucm.es/_files/_event/_26555/_editorFiles/file/Book%20CIP%202019.pdf
Abstract/Results: ABSTRACT:
We visually experience the world as stable and mostly unambiguous. However, afferent sensory information is often ambiguous, requiring perceptual interpretation to disambiguate the visual cues and construct relatively stable percepts. A moving plaid is an example of such ambiguity: the perceptual system spontaneously alternates between two interpretations while the stimulus remains unchanged. Reciprocal inhibition among visual cortex neurons has been postulated as one of the mechanisms accounting for perceptual bistability. The dominance of one percept over the competing one derives from the activation of a subset of neurons encoding that perceptual interpretation and the simultaneous suppression of those related to the opposing representations. Here, we aimed to test how these mechanisms work over time and whether the brain responses to one percept vary depending on adaptation to the previous one. We hypothesize an interaction between the neural populations responding to opposing percepts. We acquired fMRI data from 20 participants. Initially, one of three moving plaid configurations was presented: constantly coherent or incoherent, leading to adaptation; and non-adapting. Then, either coherent or incoherent motion was shown. hMT+ responded differently for the three motion patterns. Initially, we observed the expected adaptation induced difference in activation amplitude. However, contrasting with the response to non-adapting motion, the response to adapting stimuli gradually increased over time, challenging the theoretical expected sustained decrease in activity due to adaptation. Continuous adaptation of the stimulated population and the consequent gradual disinhibition of the adjacent ones might explain this late surprising increase of net activity. hMT+ activity peaked after the transition to the opposing percept, further corroborating a disinhibition effect. Our study reveals a likely inhibition mechanism varying over time as a function of adaptation, which affects neighboring neural populations tuned to distinct global motion representations. It further demonstrates a neural correlate underlying the interaction between competing perceptual states.
Accessibility: Document exists in file
Language:
eng
Author:
Sousa, T.
Secondary author(s):
Sayal, A., Duarte, J. V., Costa, G. N., Castelo-Branco, M.
Document type:
Abstract book
Number of reproductions:
1
Reference:
Sousa, T., Sayal, A., Duarte, J. V., Costa, G. N., & Castelo-Branco, M. (2019). T3.02 Neural responses underlying the interaction between competing perceptual states. 8TH Iberian Conference on Perception (p. 37). San Lorenzo de El Escorial, Spain.
Indexed document: No
Keywords: Perceptual bistability / Visual motion integration

T3.02 Neural responses underlying the interaction between competing perceptual states

T3.02 Neural responses underlying the interaction between competing perceptual states
DocumentThe dual nature of the BOLD signal: Responses in visual area hMT+ reflect both input properties and perceptual decision2021

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-2016
Location: BF-GMS
Title:
2016 Grants
Start date: 2017-01

Reference code: PT/FB/BL-2016-207
Location: BF-GMS
Title:
207 - The role of motion adaptation in bottom-up mechanisms of perceptual decision-making
Duration: 2017-11
Researcher(s):
Miguel Castelo-Branco, João Duarte, Ricardo Martins, Teresa Sousa, Gabriel Costa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Author: Castelo-Branco, M.
Secondary author(s):
Duarte, J., Martins, R., Sousa, T., Costa, G.
Number of reproductions:
1
Keywords:
Adaptation / Neuroimaging / Perceptual decision / Electroencephalogram (EEG) / Psychophysiology

Reference code: PT/FB/BL-2016-207.09
Location: BF-GMS
Title:
The dual nature of the BOLD signal: Responses in visual area hMT+ reflect both input properties and perceptual decision
Publication year: 2021
URL:
https://pubmed.ncbi.nlm.nih.gov/33576552/
Abstract/Results: ABSTRACT:
Neuroimaging studies have suggested that hMT+ encodes global motion interpretation, but this contradicts the notion that BOLD activity mainly reflects neuronal input. While measuring fMRI responses at 7 Tesla, we used an ambiguous moving stimulus, yielding the perception of two incoherently moving surfaces-component motion-or only one coherently moving surface-pattern motion, to induce perceptual fluctuations and identify perceptual organization size-matched domains in hMT+. Then, moving gratings, exactly matching either the direction of component or pattern motion percepts of the ambiguous stimulus, were shown to the participants to investigate whether response properties reflect the input or decision. If hMT+ responses reflect the input, component motion domains (selective to incoherent percept) should show grating direction stimulus-dependent changes, unlike pattern motion domains (selective to the coherent percept). This hypothesis is based on the known direction-selective nature of inputs in component motion perceptual domains versus non-selectivity in pattern motion perceptual domains. The response amplitude of pattern motion domains did not change with grating direction (consistently with their non-selective input), in contrast to what happened for the component motion domains (consistently with their selective input). However, when we analyzed relative ratio measures they mirrored perceptual interpretation. These findings are consistent with the notion that patterns of BOLD responses reflect both sensory input and perceptual read-out.
Accessibility: Document exists in file
Language:
eng
Related objects:
BL-2018-252.05
Author: Sousa, T.
Secondary author(s):
Duarte, J. V., Costa, G. N., Kemper, V. G., Martins, R., Goebel, R., Castelo-Branco, M.
Document type:
Article
Number of reproductions:
1
Percentiles:
7
Reference:
Sousa, T., Duarte, J. V., Costa, G. N., Kemper, V. G., Martins, R., Goebel, R., & Castelo-Branco, M. (2021). The dual nature of the BOLD signal: Responses in visual area hMT+ reflect both input properties and perceptual decision. Human Brain Mapping. https://doi.org/10.1002/hbm.25339
2-year Impact Factor: 5.399|2021
Times cited: 2|2024-02-14
Indexed document: Yes
Quartile: Q1
Keywords: BOLD mechanisms / Ambiguous visual motion / Direction-selective input / Perceptual bistability

The dual nature of the BOLD signal: Responses in visual area hMT+ reflect both input properties and perceptual decision

The dual nature of the BOLD signal: Responses in visual area hMT+ reflect both input properties and perceptual decision