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DocumentApparitions in the context of mental boundaries and bilaterality2002

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-2000
Location: Arquivo PCA - Pastas 1 a 13/2000
Title:
2000 Grants
Start date: 2001-01 - 2014-02
Dimension/support:
13 caixas de arquivo

Reference code: PT/FB/BL-2000-003
Location: Arquivo PCA - Pasta 9/2000
Title:
003 - Psychophysiology of transliminality
Duration: 2001-01 - 2004-06
Researcher(s):
James Houran
Institution(s): SIU School of Medicine, Springfield (USA)
Contents: Contents:
Application form
Correspondence
Financial report and expenditure documents
Progress reports
Final report as a doctoral thesis
13 Articles (published or submitted)
SPSS outputs
Language: eng
Author:
Houran, J.
Number of reproductions:
2
Keywords:
Parapsychology / Transliminality / Paranormal belief / Apparitions/haunting / Cognitive processes

Reference code: PT/FB/BL-2000-03.11
Location: Arquivo PCA - Pasta 9/2000
Title:
Apparitions in the context of mental boundaries and bilaterality
Publication year: 2002
URL:
http://www.bial.com/pt/fundacao_bial.11/simposios.19/edicoes_anteriores.75/4%C2%BA_simposio.a110.html
Accessibility: Document does not exist in file
Language:
eng
Author:
Houran, J.
Secondary author(s):
Thalbourne, M. A.
Document type:
Conference abstract
Number of reproductions:
2
Reference:
Houran, J., & Thalbourne, M. A. (2002). Apparitions in the context of mental boundaries and bilaterality. In Aquém e além do cérebro. Behind and beyond the brain. Proceedings of the 4th Symposium of Fundação Bial (p.427). Porto: Fundação Bial.
Indexed document: No
Keywords: Parapsychology / Transliminality / Paranormal belief / Apparitions / Hemispheric specialization

Apparitions in the context of mental boundaries and bilaterality

Apparitions in the context of mental boundaries and bilaterality
DocumentEgo-alien intrusions in the context of mental boundaries and hemispheric specializationn.d.

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-2000
Location: Arquivo PCA - Pastas 1 a 13/2000
Title:
2000 Grants
Start date: 2001-01 - 2014-02
Dimension/support:
13 caixas de arquivo

Reference code: PT/FB/BL-2000-003
Location: Arquivo PCA - Pasta 9/2000
Title:
003 - Psychophysiology of transliminality
Duration: 2001-01 - 2004-06
Researcher(s):
James Houran
Institution(s): SIU School of Medicine, Springfield (USA)
Contents: Contents:
Application form
Correspondence
Financial report and expenditure documents
Progress reports
Final report as a doctoral thesis
13 Articles (published or submitted)
SPSS outputs
Language: eng
Author:
Houran, J.
Number of reproductions:
2
Keywords:
Parapsychology / Transliminality / Paranormal belief / Apparitions/haunting / Cognitive processes

Reference code: PT/FB/BL-2000-003.14
Location: Arquivo PCA - Pasta 9/2000
Title:
Ego-alien intrusions in the context of mental boundaries and hemispheric specialization
Publication year: n.d.
Accessibility:
Document exists in file
Copyright/Reproduction:
By permission
Language:
eng
Author:
Houran, J.
Secondary author(s):
Ashe, D. D., Thalbourne, M. A.
Document type:
Unpublished document
Number of reproductions:
2
Reference:
Houran, J., Ashe, D. D., & Thalbourne, M. A. (n. d.). Ego-alien intrusions in the context of mental boundaries and hemispheric specialization [Unpublished document].
Indexed document: No
Keywords: Parapsychology / Transliminality / Hemispheric specialization / Apparitions

Ego-alien intrusions in the context of mental boundaries and hemispheric specialization [Texto policopiado].

Ego-alien intrusions in the context of mental boundaries and hemispheric specialization [Texto policopiado].

DocumentEncounter experiences in the context of mental boundaries and bilaterality2003

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-2000
Location: Arquivo PCA - Pastas 1 a 13/2000
Title:
2000 Grants
Start date: 2001-01 - 2014-02
Dimension/support:
13 caixas de arquivo

Reference code: PT/FB/BL-2000-003
Location: Arquivo PCA - Pasta 9/2000
Title:
003 - Psychophysiology of transliminality
Duration: 2001-01 - 2004-06
Researcher(s):
James Houran
Institution(s): SIU School of Medicine, Springfield (USA)
Contents: Contents:
Application form
Correspondence
Financial report and expenditure documents
Progress reports
Final report as a doctoral thesis
13 Articles (published or submitted)
SPSS outputs
Language: eng
Author:
Houran, J.
Number of reproductions:
2
Keywords:
Parapsychology / Transliminality / Paranormal belief / Apparitions/haunting / Cognitive processes

Reference code: PT/FB/BL-2000-003.16
Location: Arquivo PCA - Pasta 9/2000
Title:
Encounter experiences in the context of mental boundaries and bilaterality
Publication year: 2003
URL:
http://www.spr.ac.uk/psedsite/JSPRabstracts.php3?year=2003
Abstract/Results: ABSTRACT:
The homologue of left hemispheric (language) processes in the right hemisphere may be the primary neurological basis for encounter experiences. Thus, their perception should typically be located to the left of the experient's body. We tested this prediction in a convenience sample of 268 participants who completed a measure of encounter experiences, the Revised Transliminality Scale, the Boundary Questionnaire, the Rasch-scaled version of the Revised Paranormal Belief Scale, and the Briggs-Nebes Handedness Scale. Results are consistent with the notion that encounter experiences are related to specific aspects of thinner (or thicker) mental boundaries, but that this association is not mediated by bilaterality. Encounter experiences also showed no preference for body side. Accordingly, we found no support for the hypothesis that encounter experiences are the awareness of the right hemispheric equivalent of the sense of self. Rather, our findings suggest that there are different variables which facilitate the initial detection/perception of encounter experiences as opposed to affecting the content of encounter experiences. Overall, the confluence of significant correlations between encounter experiences, certain forms of mental boundaries, and paranormal beliefs supports the idea that these experiences partly reflect imagery, ideation, affect, and perception that derive from regions across thresholds -- a process that we speculate can occur under different physiological conditions.
Accessibility: Document exists in file (previous version submitted for publication)
Copyright/Reproduction:
By permission
Language:
eng
Author:
Houran, J.
Secondary author(s):
Ashe, D. D., Thalbourne, M. A.
Document type:
Article
Number of reproductions:
2
Reference:
Houran, J., Ashe, D., & Thalbourne, M. A. (2003). Encounter experiences in the context of mental boundaries and bilaterality. Society for Psychical Research, 67(4), 260-279.
Indexed document: No
Keywords: Parapsychology / Transliminality / Hemispheric specialization / Apparitions

Encounter experiences in the contexto of mental boundaries and bilaterality [Texto policopiado]

Encounter experiences in the contexto of mental boundaries and bilaterality [Texto policopiado]
DocumentRetinal and cortical patterns of spatial anisotropy in contrast sensitivity tasks2008

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-2002
Location: Arquivo PCA - Pastas 1 a 21/2002
Title:
2002 Grants
Start date: 2003-01 - 2009-11
Dimension/support:
21 caixas de arquivo

Reference code: PT/FB/BL-2002-015
Location: Arquivo PCA - Pasta 9/2002
Title:
015 - Bases psicofisiológicas dos fenómenos de consciência visual
Duration: 2003-01 - 2005-12
Researcher(s):
Miguel Castelo-Branco, Lajos Kozac, Mafalda Mendes, Vasco Forjaz, Manuela Guerreiro
Institution(s): Centro de Oftalmologia, Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Financial report and expenditure documents
Progress reports
Final report
Language: por
Author:
Castelo-Branco, M.
Secondary author(s):
Kozak, L., Mendes, M., Forjaz, V., Guerreiro, M.
Number of reproductions:
1
Keywords:
Psychophysiology / Body structure and function / Vision / Brain structure and function / Cognitive processes / Diseases/Injuries / Chromosomal abnormalities

Reference code: PT/FB/BL-2002-015.05
Location: Arquivo PCA - Pasta 9/2002
Title:
Retinal and cortical patterns of spatial anisotropy in contrast sensitivity tasks
Publication year: 2008
URL:
http://www.ncbi.nlm.nih.gov/pubmed/18067943
Contents: http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=341&SID=Z1T1li1SW9lnlKPlMpq&page=1&doc=1
Abstract/Results: ABSTRACT:
It has often been postulated that asymmetries in performance within the visual field (VF) are not characteristic of early visual processing. Here, human retinal (naso/temporal), cortical (left/right) and superior/inferior patterns of asymmetry were explored with achromatic contrast sensitivity (CS) tasks, that probed distinct spatiotemporal frequency channels. Low spatial, high temporal frequency stimuli (illusory frequency-doubling (FD)) yielded superior and temporal field disadvantage. Independent right and nasal visual hemifield patterns of disadvantage were found when probing an intermediate spatial frequency (ISF) channel, with stationary sinusoidal gratings. These findings show that asymmetries in spatial vision are explained by independent retinal and cortical mechanisms.
Accessibility: Document does not exist in file
Language:
eng
Author:
Silva, M. F.
Secondary author(s):
Maia-Lopes, S., Mateus, C., Guerreiro, M., Sampaio, J., Castelo-Branco, M.
Document type:
Article
Number of reproductions:
1
Reference:
Silva, M. F., Maia-Lopes, S., Mateus, C., Guerreiro, M., Sampalo, J., Faria, P., & Castelo-Branco, M. (2008). Retinal and cortical patterns of spatial anisotropy in contrast sensitivity tasks. Vision Research, 48(1), 127-135. https://doi.org/10.1016/j.visres.2007.10.018
2-year Impact Factor: 2.051|2008
Times cited: 43|2025-09-09
Indexed document: Yes
Quartile: Q2
Keywords: Contrast sensitivity / Asymmetry / Spatial vision / Magnification factor / Visual system / Cerebral dominance / Hemispheric specialization
DocumentIncreasing interhemispheric connectivity between human visual motion areas uncovers asymmetric sensitivity to horizontal motion2022

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-2018
Location: BF-GMS
Title:
2018 Grants
Start date: 2019-01

Reference code: PT/FB/BL-2018-347
Location: BF-GMS
Title:
347 - Driving synaptic plasticity in motor-to-visual neural pathways to enhance action prediction
Duration: 2019-10 - 2023-06
Researcher(s):
Alessio Avenanti, Marco Zanon
Institution(s): Department of Psychology, Alma Mater Studiorum - Università di Bologna (Italy)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Final report
Articles
Language: eng
Author:
Avenanti, A.
Secondary author(s):
Zanon, M.
Number of reproductions:
1
Keywords:
Action observation / Prediction / Plasticity / Connectivity / Psychophysiology

Reference code: PT/FB/BL-2018-347.24
Location: BF-GMS
Title:
Increasing interhemispheric connectivity between human visual motion areas uncovers asymmetric sensitivity to horizontal motion
Publication year: 2022
URL:
https://www.cell.com/current-biology/fulltext/S0960-9822(22)01199-X?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS096098222201199X%3Fshowall%3Dtrue
Abstract/Results: ABSTRACT:
Our conscious perceptual experience relies on a hierarchical process involving integration of low-level sensory encoding and higher-order sensory selection.1 This hierarchical process may scale at different levels of brain functioning, including integration of information between the hemispheres.2-5 Here, we test this hypothesis for the perception of visual motion stimuli. Across 3 experiments, we manipulated the connectivity between the left and right visual motion complexes (V5/MT+) responsible for horizontal motion perception2,3 by means of transcranial magnetic stimulation (TMS).4,5 We found that enhancing the strength of connections from the left to the right V5/MT+, by inducing spike-timing-dependent plasticity6 in this pathway, increased sensitivity to horizontal motion. These changes were present immediately and lasted at least 90 min after intervention. Notably, little perceptual changes were observed when strengthening connections from the right to the left V5/MT+. Furthermore, we found that this asymmetric modulation was mirrored by an asymmetric perceptual bias in the direction of the horizontal motion. Overall, observers were biased toward leftward relative to rightward motion direction. Crucially, following the strengthening of the connections from right to left V5/MT+, this bias could be momentarily reversed. These results suggest that the projections connecting left and right V5/MT+ in the human visual cortex are asymmetrical, subtending a hierarchical role of hemispheric specialization7-10 favoring left-to-right hemisphere processing for integrating local sensory input into coherent global motion perception.
Accessibility: Document does not exist in file
Language:
eng
Author:
Chiappini, E.
Secondary author(s):
Sel, A., Hibbard, P. B., Avenanti, A., Romei, V.
Document type:
Article
Number of reproductions:
1
Reference:
Chiappini, E., Sel, A., Hibbard, P. B., Avenanti, A., & Romei, V. (2022). Increasing interhemispheric connectivity between human visual motion areas uncovers asymmetric sensitivity to horizontal motion. Current Biology, 32(18), 4064-4070.e3. https://doi.org/10.1016/j.cub.2022.07.050
2-year Impact Factor: 9.200|2022
Times cited: 17|2025-09-24
Indexed document: Yes
Quartile: Q1
Keywords: Hebbian-like plasticity / V5/MT+ / Bistable motion / cortico-cortical paired associative stimulation (ccPAS) / Hemispheric specialization / Horizontal motion / Interhemispheric connectivity / Spike-timing-dependent plasticity / Transcranial magnetic stimulation (TMS)