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Type Title Begin End
DocumentNeural bases of prospective memory: A meta-analysis and the “Attention to Delayed Intention” (AtoDI) model2015

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-2012
Location: SEC PCA
Title:
2012 Grants
Start date: 2013-02

Reference code: PT/FB/BL-2012-084
Location: Arquivo PCA - Pasta 13/2012
Title:
084 - Neural bases of time processing: combining neuroimaging techniques and clinical evidence
Duration: 2013-03 - 2016-04
Researcher(s):
Patrizia Bisiacchi, Gianna Maria Toffolo, Vincenza Tarantino, Elias Casula, Giovanni Mento, Demis Basso
Institution(s): Dipartimento di Psicologia Generale, Università di Padova (Italy)
Contents: Contents:
Bursary agreement
Application form
Correspondence
Progress report
Final report
Language: eng
Author:
Bisiacchi, P.
Secondary author(s):
Toffolo, G., Tarantino, V., Casula, E., Mento, G., Basso, D.
Number of reproductions:
1
Keywords:
Psychophysiology / Cognitive processes / Brain structure and function / Biopsychological problems / Childhood and adolescent disorders / Autism spectrum disorder (ASD) / Neurodegenerative disorders / Parkinson's disease

Reference code: PT/FB/BL-2012-084.11
Location: Arquivo PCA - Pasta 13/2012
Title:
Neural bases of prospective memory: A meta-analysis and the “Attention to Delayed Intention” (AtoDI) model
Publication year: 2015
URL:
http://www.sciencedirect.com/science/article/pii/S0149763415000524
Abstract/Results: ABSTRACT:
Remembering to realize delayed intentions is a multi-phase process, labelled as prospective memory (PM), and involves a plurality of neural networks. The present study utilized the activation likelihood estimation method of meta-analysis to provide a complete overview of the brain regions that are consistently activated in each PM phase. We formulated the ‘Attention to Delayed Intention’ (AtoDI) model to explain the neural dissociation found between intention maintenance and retrieval phases. The dorsal frontoparietal network is involved mainly in the maintenance phase and seems to mediate the strategic monitoring processes, such as the allocation of top-down attention both towards external stimuli, to monitor for the occurrence of the PM cues, and to internal memory contents, to maintain the intention active in memory. The ventral frontoparietal network is recruited in the retrieval phase and might subserve the bottom-up attention captured externally by the PM cues and, internally, by the intention stored in memory. Together with other brain regions (i.e., insula and posterior cingulate cortex), the ventral frontoparietal network would support the spontaneous retrieval processes. The functional contribution of the anterior prefrontal cortex is discussed extensively for each PM phase.
Accessibility: Document does not exist in file
Language:
eng
Author:
Cona, G.
Secondary author(s):
Scarpazza, C., Sartori, G., Moskovitch, M., Bisiacchi, P.
Document type:
Article
Number of reproductions:
1
Reference:
Cona, G., Scarpazza, C., Sartori, G., Moskovitch, M., & Bisiacchi P. S. (2015). Neural bases of prospective memory: A meta-analysis and the “Attention to Delayed Intention” (AtoDI) model. Neuroscience and Biobehavioral Reviews, 52, 21-37. https://doi.org/10.1016/j.neubiorev.2015.02.007
2-year Impact Factor: 8.580|2015
Times cited: 161|2025-09-10
Indexed document: Yes
Quartile: Q1
Keywords: Prospective memory / Delayed intention / Activation likelihood estimation / Meta-analysis / Neuroimaging / Gateway Hypothesis / Frontoparietal network / Anterior prefrontal cortex / BA10 / Insula / Anterior cingulate cortex / Posterior cingulate cortex / Parietal cortex / DLPFC / Top-down attention / Bottom-up attention / AtoM / AtoDI / Attention to Delayed Intention model / Multiprocess framework / Spontaneous retrieval / Strategic monitoring
DocumentWorking memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources2016

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-2012
Location: SEC PCA
Title:
2012 Grants
Start date: 2013-02

Reference code: PT/FB/BL-2012-133
Location: Arquivo PCA - Pasta 9/2012
Title:
133 - The role of the core and extended face networks in visual perception and high level social cognition
Duration: 2013-11 - 2016-01
Researcher(s):
Miguel Castelo-Branco, Marco Simões, Carlos Amaral, Gregor Philipiak, José Rebola, João Castelhano
Institution(s): IBILI, Faculdade de Medicina, Universidade de Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Language: eng
Author:
Castelo-Branco, M.
Secondary author(s):
Simões, M., Amaral, C., Philipiak, G., Rebola, J., Castelhano, J.
Number of reproductions:
1
Keywords:
Psychophysiology / Cognitive processes / Perception / Attention / Affective and social behavior / Social cognition / Brain structure and function

Reference code: PT/FB/BL-2012-133.13
Location: Arquivo PCA - Pasta 9/2012
Title:
Working memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources
Publication year: 2016
URL:
https://www.ncbi.nlm.nih.gov/pubmed/27590722
Abstract/Results: ABSTRACT:
A visual stimulus is defined as ambiguous when observers perceive it as having at least two distinct and spontaneously alternating interpretations. Neuroimaging studies suggest an involvement of a right fronto-parietal network regulating the balance between stable percepts and the triggering of alternative interpretations. As spontaneous perceptual reversals may occur even in the absence of attention to these stimuli, we investigated neural activity patterns in response to perceptual changes of ambiguous Necker cube under different amounts of working memory load using a dual-task design. We hypothesized that the same regions that process working memory load are involved in perceptual switching and confirmed the prediction that perceptual reversals led to fMRI responses that linearly depended on load. Accordingly, posterior Superior Parietal Lobule, anterior Prefrontal and Dorsolateral Prefrontal cortices exhibited differential BOLD signal changes in response to perceptual reversals under working memory load. Our results also suggest that the posterior Superior Parietal Lobule may be directly involved in the emergence of perceptual reversals, given that it specifically reflects both perceptual versus real changes and load levels. The anterior Prefrontal and Dorsolateral Prefrontal cortices, showing a significant interaction between reversal levels and load, might subserve a modulatory role in such reversals, in a mirror symmetric way: in the former activation is suppressed by the highest loads, and in the latter deactivation is reduced by highest loads, suggesting a more direct role of the aPFC in reversal generation.
Accessibility: Document exists in file
Copyright/Reproduction:
By permission
Language:
eng
Related objects:
BL-2012-132.15; BL-2014-373.02
Author: Intaite, M.
Secondary author(s):
Duarte, J., Castelo-Branco, M.
Document type:
Article
Number of reproductions:
1
Reference:
Intaite, M., Duarte, J., & Castelo-Branco, M. (2016). Working memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources. Brain Research, 1650, 142-151. https://doi.org/10.1016/j.brainres.2016.08.044
2-year Impact Factor: 2.746|2016
Times cited: 6|2025-09-16
Indexed document: Yes
Quartile: Q3
Keywords: Anterior prefrontal cortex / Dorsolateral prefrontal cortex / Functional magnetic resonance imaging (fMRI) / Necker cube / Posterior superior parietal lobule / Working memory load
DocumentWorking memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources2016

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-2012
Location: SEC PCA
Title:
2012 Grants
Start date: 2013-02

Reference code: PT/FB/BL-2012-132
Location: Arquivo PCA - Pasta 11/2012
Title:
132 - A direct test of the binding by synchrony hypothesis in humans: the neural correlates of coherent object perception
Duration: 2013-11 - 2016-01
Researcher(s):
Miguel Castelo-Branco, Maria Ribeiro, João Duarte, Gabriel Costa
Institution(s): IBILI, Faculdade de Medicina, Universidade de Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Progress reports
Final report
Article
Language: eng
Author:
Castelo-Branco, M.
Secondary author(s):
Ribeiro, M., Duarte, J., Costa, G.
Number of reproductions:
1
Keywords:
Psychophysiology / Cognitive processes / Perception / Brain structure and function

Reference code: PT/FB/BL-2012-132.15
Location: Arquivo PCA - Pasta 11/2012
Title:
Working memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources
Publication year: 2016
URL:
https://www.ncbi.nlm.nih.gov/pubmed/27590722
Abstract/Results: ABSTRACT:
A visual stimulus is defined as ambiguous when observers perceive it as having at least two distinct and spontaneously alternating interpretations. Neuroimaging studies suggest an involvement of a right fronto-parietal network regulating the balance between stable percepts and the triggering of alternative interpretations. As spontaneous perceptual reversals may occur even in the absence of attention to these stimuli, we investigated neural activity patterns in response to perceptual changes of ambiguous Necker cube under different amounts of working memory load using a dual-task design. We hypothesized that the same regions that process working memory load are involved in perceptual switching and confirmed the prediction that perceptual reversals led to fMRI responses that linearly depended on load. Accordingly, posterior Superior Parietal Lobule, anterior Prefrontal and Dorsolateral Prefrontal cortices exhibited differential BOLD signal changes in response to perceptual reversals under working memory load. Our results also suggest that the posterior Superior Parietal Lobule may be directly involved in the emergence of perceptual reversals, given that it specifically reflects both perceptual versus real changes and load levels. The anterior Prefrontal and Dorsolateral Prefrontal cortices, showing a significant interaction between reversal levels and load, might subserve a modulatory role in such reversals, in a mirror symmetric way: in the former activation is suppressed by the highest loads, and in the latter deactivation is reduced by highest loads, suggesting a more direct role of the aPFC in reversal generation.
Accessibility: Document exists in file
Copyright/Reproduction:
By permission
Language:
eng
Related objects:
BL-2012-133.13; BL-2014-373.02
Author: Intaite, M.
Secondary author(s):
Duarte, J., Castelo-Branco, M.
Document type:
Article-d
Number of reproductions:
1
Reference:
Intaite, M., Duarte, J., & Castelo-Branco, M. (2016). Working memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources. Brain Research, 1650, 142-151. https://doi.org/10.1016/j.brainres.2016.08.044
2-year Impact Factor: 2.746|2016
Times cited: 6|2025-09-16
Indexed document: Yes
Quartile: Q3
Keywords: Anterior Prefrontal Cortex / Dorsolateral Prefrontal Cortex / Functional magnetic resonance imaging (fMRI) / Necker cube / Posterior superior parietal lobule / Working memory load
DocumentWorking memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources2016

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-2014-373.02
Location: BF-GMS
Title:
Working memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources
Publication year: 2016
URL:
https://www.ncbi.nlm.nih.gov/pubmed/27590722
Abstract/Results: ABSTRACT:
A visual stimulus is defined as ambiguous when observers perceive it as having at least two distinct and spontaneously alternating interpretations. Neuroimaging studies suggest an involvement of a right fronto-parietal network regulating the balance between stable percepts and the triggering of alternative interpretations. As spontaneous perceptual reversals may occur even in the absence of attention to these stimuli, we investigated neural activity patterns in response to perceptual changes of ambiguous Necker cube under different amounts of working memory load using a dual-task design. We hypothesized that the same regions that process working memory load are involved in perceptual switching and confirmed the prediction that perceptual reversals led to fMRI responses that linearly depended on load. Accordingly, posterior Superior Parietal Lobule, anterior Prefrontal and Dorsolateral Prefrontal cortices exhibited differential BOLD signal changes in response to perceptual reversals under working memory load. Our results also suggest that the posterior Superior Parietal Lobule may be directly involved in the emergence of perceptual reversals, given that it specifically reflects both perceptual versus real changes and load levels. The anterior Prefrontal and Dorsolateral Prefrontal cortices, showing a significant interaction between reversal levels and load, might subserve a modulatory role in such reversals, in a mirror symmetric way: in the former activation is suppressed by the highest loads, and in the latter deactivation is reduced by highest loads, suggesting a more direct role of the aPFC in reversal generation.
Accessibility: Document exists in file
Copyright/Reproduction:
By permission
Language:
eng
Related objects:
BL-2012-132.15; BL-2012-133.13
Author: Intaite, M.
Secondary author(s):
Duarte, J., Castelo-Branco, M.
Document type:
Article-d
Number of reproductions:
1
Reference:
Intaite, M., Duarte, J., & Castelo-Branco, M. (2016). Working memory load influences perceptual ambiguity by competing for fronto-parietal attentional resources. Brain Research, 1650, 142-151. https://doi.org/10.1016/j.brainres.2016.08.044
2-year Impact Factor: 2.746|2016
Times cited: 6|2025-09-16
Indexed document: Yes
Quartile: Q3
Keywords: Anterior prefrontal cortex / Functional magnetic resonance imaging (fMRI) / Necker cube / Posterior superior parietal lobule / Working memory load