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File231 - Toward understanding visual awareness: An intracranial EEG study on transient suppression phenomena of conscious visual perception2011-062014-07

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-2010
Location: Arquivo PCA - Pastas 1 a 23
Title:
2010 Grants
Start date: 2011-01

Reference code: PT/FB/BL-2010-231
Location: Arquivo PCA - Pasta 13/2010
Title:
231 - Toward understanding visual awareness: An intracranial EEG study on transient suppression phenomena of conscious visual perception
Duration: 2011-06 - 2014-07
Researcher(s):
Tonio Ball, Andreas Schulze-Bonhage, Ad Aertsen, Jörn Rickert, Markus Kern
Institution(s): Epilepsy Center, University Hospital, Freiburg (Germany)
Contents: Contents:
Bursary agreement
Application form
Correspondence
Financial report and expenditure documents
Progress report
Language: eng
Author:
Ball, T.
Secondary author(s):
Schulze-Bonhage, A., Aertsen, A., Rickert, J., Kern, M.
Number of reproductions:
1
Keywords:
Psychophysiology / Cognitive processes / Perception / Body structure and function / Vision / Brain structure and function
DocumentHeart cycle-related effects on event-related potentials, spectral power changes, and connectivity patterns in the human ECoG2013

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-2010
Location: Arquivo PCA - Pastas 1 a 23
Title:
2010 Grants
Start date: 2011-01

Reference code: PT/FB/BL-2010-231
Location: Arquivo PCA - Pasta 13/2010
Title:
231 - Toward understanding visual awareness: An intracranial EEG study on transient suppression phenomena of conscious visual perception
Duration: 2011-06 - 2014-07
Researcher(s):
Tonio Ball, Andreas Schulze-Bonhage, Ad Aertsen, Jörn Rickert, Markus Kern
Institution(s): Epilepsy Center, University Hospital, Freiburg (Germany)
Contents: Contents:
Bursary agreement
Application form
Correspondence
Financial report and expenditure documents
Progress report
Language: eng
Author:
Ball, T.
Secondary author(s):
Schulze-Bonhage, A., Aertsen, A., Rickert, J., Kern, M.
Number of reproductions:
1
Keywords:
Psychophysiology / Cognitive processes / Perception / Body structure and function / Vision / Brain structure and function

Reference code: PT/FB/BL-2010-231.02
Location: Arquivo PCA - Pasta 13/2010
Title:
Heart cycle-related effects on event-related potentials, spectral power changes, and connectivity patterns in the human ECoG
Publication year: 2013
URL:
http://www.sciencedirect.com/science/article/pii/S1053811913005363
Abstract/Results: ABSTRACT:
The perception of one's own heartbeat is a fundamental interoceptive process that involves cortical and subcortical structures. Yet, the precise spatiotemporal neuronal activity patterns underlying the cortical information processing have remained largely elusive. Although the high temporal and spatial resolution of electrocorticographic (ECoG) recordings is increasingly being exploited in functional neuroimaging, it has not been used to study heart cycle-related effects. Here, we addressed the capacity of ECoG to characterize neuronal signals within the cardiac cycle, as well as to disentangle them from heart cycle-related artifacts. Based on topographical distribution and latency, we identified a biphasic potential within the primary somatosensory cortex, which likely constitutes a heartbeat-evoked potential (HEP) of neuronal origin. We also found two different types of artifacts: i) oscillatory potential changes with a frequency identical to the heart pulse rate, which probably represent pulsatility artifacts and ii) sharp potentials synchronized to the R-peak, corresponding to the onset of ventricular contraction and the cardiac field artifact (CFA) in EEG. Finally, we show that heart cycle-related effects induce pronounced phase-synchrony patterns in the ECoG and that this kind of correlation patterns, which may confound ECoG connectivity studies, can be reduced by a suitable correction algorithm. The present study is, to our knowledge, the first one to show a focally localized cortical HEP that could be clearly and consistently observed over subjects, suggesting a basic role of primary sensory cortex in processing of heart-related sensory inputs. We also conclude that taking into account and reducing heart cycle-related effects may be advantageous for many ECoG studies, and are of crucial importance, particularly for ECoG-based connectivity studies. Thus, in summary, although ECoG poses new challenges, it opens up new possibilities for the investigation of heartbeat-related viscerosensory processing in the human brain.
Accessibility: Document exists in file
Copyright/Reproduction:
By permission
Language:
eng
Author:
Kern, M.
Secondary author(s):
Aertsen, A., Schulze-Bonhage, A., Ball, T.
Document type:
Article
Number of reproductions:
1
Percentiles:
4
Reference:
Kern, M., Aertsen, A., Schulze-Bonhage, A., & Ball, T. (2013). Heart cycle-related effects on event-related potentials, spectral power changes, and connectivity patterns in the human ECoG. Neuroimage, 81, 178-190. https://doi.org/10.1016/j.neuroimage.2013.05.042
2-year Impact Factor: 6.132|2013
Times cited: 84|2024-02-02
Indexed document: Yes
Quartile: Q1
Keywords: Heartbeat-evoked potential / Somatosensory cortex / Electrocorticogram / Phase synchronization / Connectivity / Signal quality

Heart cycle-related effects on event-related potentials, spectral power changes, and connectivity patterns in the human ECoG

Heart cycle-related effects on event-related potentials, spectral power changes, and connectivity patterns in the human ECoG
DocumentFinal report - An intracranial EEG study on transient suppression phenomena of conscious visual perception2014

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-2010
Location: Arquivo PCA - Pastas 1 a 23
Title:
2010 Grants
Start date: 2011-01

Reference code: PT/FB/BL-2010-231
Location: Arquivo PCA - Pasta 13/2010
Title:
231 - Toward understanding visual awareness: An intracranial EEG study on transient suppression phenomena of conscious visual perception
Duration: 2011-06 - 2014-07
Researcher(s):
Tonio Ball, Andreas Schulze-Bonhage, Ad Aertsen, Jörn Rickert, Markus Kern
Institution(s): Epilepsy Center, University Hospital, Freiburg (Germany)
Contents: Contents:
Bursary agreement
Application form
Correspondence
Financial report and expenditure documents
Progress report
Language: eng
Author:
Ball, T.
Secondary author(s):
Schulze-Bonhage, A., Aertsen, A., Rickert, J., Kern, M.
Number of reproductions:
1
Keywords:
Psychophysiology / Cognitive processes / Perception / Body structure and function / Vision / Brain structure and function

Reference code: PT/FB/BL-2010-231.01
Location: Arquivo PCA - Pasta 13/2010
Title:
Final report - An intracranial EEG study on transient suppression phenomena of conscious visual perception
Publication year: 2014
URL:
https://www.bial.com/imagem/Bolsa23110.pdf
Abstract/Results: ABSTRACT:
Aim of the present project was to study and elucidate the neural mechanisms of blink and saccadic suppression by taking advantage of intracranial electrophysiology. We found a characteristic biphasic broadband gamma decrease-increase pattern over early visual areas, during both blinks and saccades.
A high-frequency spectral magnitude decrease and low-frequency magnitude increase during blinking was also recorded over parietal cortex, temporal cortex and particularly robust over prefrontal cortex. The high-frequency spectral magnitude decrease and low-frequency magnitude increase recorded during eye movement execution over early visual areas and prefrontal cortex likely reflects neural correlates of a top-down signal associated with visual suppression. Furthermore, we found a significant saccade-related decrease in the gamma band of V1 approx. 40 ms prior to saccade onset, i.e., in a time window that was completely non-overlapping with saccade onset. This result supports the hypothesis, because a bottom-up mechanism could not yet function at that time.
Saccades more than blinks however elicited a late, narrower-banded gamma response over early visual areas that may reflect the processing of new visual input after saccadic movement to a new eye position. A comparable pattern with a phasic broadband gamma augmentation followed by a more narrow-banded sustained gamma response was previously found in the primate visual cortex during visual stimulation with Gabor stimuli.
We conclude that early visual areas, including striate- and extra-striate cortices, as well as areas of higher visual processing are involved in the processing of visual awareness.
Accessibility: Document exists in file
Copyright/Reproduction:
By permission
Language:
eng
Author:
Ball, T.
Secondary author(s):
Schulze-Bonhage, A., Aertsen, A., Rickert, J., Kern, M.
Document type:
Final report
Number of reproductions:
1
Indexed document:
No
Keywords: Vision / Perception / Visual suppression
DocumentBlink- and Saccade-related suppression effects in early visual areas of the human brain: Intracranial EEG investigations during natural viewing conditions2021

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-2010
Location: Arquivo PCA - Pastas 1 a 23
Title:
2010 Grants
Start date: 2011-01

Reference code: PT/FB/BL-2010-231
Location: Arquivo PCA - Pasta 13/2010
Title:
231 - Toward understanding visual awareness: An intracranial EEG study on transient suppression phenomena of conscious visual perception
Duration: 2011-06 - 2014-07
Researcher(s):
Tonio Ball, Andreas Schulze-Bonhage, Ad Aertsen, Jörn Rickert, Markus Kern
Institution(s): Epilepsy Center, University Hospital, Freiburg (Germany)
Contents: Contents:
Bursary agreement
Application form
Correspondence
Financial report and expenditure documents
Progress report
Language: eng
Author:
Ball, T.
Secondary author(s):
Schulze-Bonhage, A., Aertsen, A., Rickert, J., Kern, M.
Number of reproductions:
1
Keywords:
Psychophysiology / Cognitive processes / Perception / Body structure and function / Vision / Brain structure and function

Reference code: PT/FB/BL-2010-231.03
Location: Arquivo PCA - Pasta 13/2010
Title:
Blink- and Saccade-related suppression effects in early visual areas of the human brain: Intracranial EEG investigations during natural viewing conditions
Publication year: 2021
URL:
https://www.sciencedirect.com/science/article/pii/S1053811921000653
Abstract/Results: ABSTRACT:
Blinks and saccades, both ubiquitous in natural viewing conditions, cause rapid changes of visual inputs that are hardly consciously perceived. The neural dynamics in early visual areas of the human brain underlying this remarkable visual stability are still incompletely understood. We used electrocorticography (ECoG) from electrodes directly implanted on the human early visual areas V1, V2, V3d/v, V4d/v and the fusiform gyrus to investigate blink- and saccade-related neuronal suppression effects during non-experimental, free viewing conditions. We found a characteristic, biphasic, broadband gamma power decrease-increase pattern in all investigated visual areas. During saccades, a decrease in gamma power clearly preceded eye movement onset, at least in V1. This may indicate that cortical information processing is actively suppressed in human early visual areas before and during saccades, which then possibly mediates perceptual visual suppression. The following eye movement offset-related increase in gamma power may indicate the recovery of visual perception and the resumption of visual processing.
Accessibility: Document exists in file
Language:
eng
Author:
Kern, M.
Secondary author(s):
Schulze-Bonhage, A., Ball, T.
Document type:
Article
Number of reproductions:
1
Percentiles:
6
Reference:
Kern, M., Schulze-Bonhage, A., & Ball, T. (2021). Blink- and Saccade-related suppression effects in early visual areas of the human brain: Intracranial EEG investigations during natural viewing conditions. NeuroImage, 230: 117788. https://doi.org/10.1016/j.neuroimage.2021.117788
2-year Impact Factor: 6.556|2020
Impact factor notes: Impact factor not available yet for 2021
Times cited: 6|2024-02-14
Indexed document: Yes
Quartile: Q1
Keywords: Visual stability / Blink suppression / Saccadic suppression / Intracranial / ECoG

Blink- and Saccade-related suppression effects in early visual areas of the human brain: Intracranial EEG investigations during natural viewing conditions

Blink- and Saccade-related suppression effects in early visual areas of the human brain: Intracranial EEG investigations during natural viewing conditions