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BIAL Foundation
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DocumentHow hot is the hot zone? Computational modelling clarifies the role of parietal and frontoparietal connectivity during anaesthetic-induced loss of consciousness2021

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: NDE
Location: Arquivo PCA - Pasta 1/Outros Apoios
Title:
Characterization of “Near-Death Experiences” through the comparison of experiencers and non-experiencers’ particularities: inter-individual differences in cognitive characteristics and susceptibility to false memories
Duration: 2016-03 - 2019-03
Researcher(s):
Steven Laureys, Charlotte Martial, Vanessa Charland-Verville, Héléna Cassol
Institution(s): Coma Science Group, University of Liège (Belgium)
Contents: Application
Research Funding Agreement
Progress report
Final report
Articles
Language: eng
Author:
Laureys, S.
Number of reproductions:
3
Keywords:
Parapsychology and Psychophysiology / Near-death experience / Functional magnetic resonance imaging (fMRI)

Reference code: NDE-85
Location: BF-GMS
Title:
How hot is the hot zone? Computational modelling clarifies the role of parietal and frontoparietal connectivity during anaesthetic-induced loss of consciousness
Publication year: 2021
URL:
https://www.sciencedirect.com/science/article/pii/S105381192100118X?via%3Dihub
Abstract/Results: ABSTRACT:
In recent years, specific cortical networks have been proposed to be crucial for sustaining consciousness, including the posterior hot zone and frontoparietal resting state networks (RSN). Here, we computationally evaluate the relative contributions of three RSNs – the default mode network (DMN), the salience network (SAL), and the central executive network (CEN) – to consciousness and its loss during propofol anaesthesia. Specifically, we use dynamic causal modelling (DCM) of 10 min of high-density EEG recordings (N = 10, 4 males) obtained during behavioural responsiveness, unconsciousness and post-anaesthetic recovery to characterise differences in effective connectivity within frontal areas, the posterior ‘hot zone’, frontoparietal connections, and between-RSN connections. We estimate – for the first time – a large DCM model (LAR) of resting EEG, combining the three RSNs into a rich club of interconnectivity. Consistent with the hot zone theory, our findings demonstrate reductions in inter-RSN connectivity in the parietal cortex. Within the DMN itself, the strongest reductions are in feed-forward frontoparietal and parietal connections at the precuneus node. Within the SAL and CEN, loss of consciousness generates small increases in bidirectional connectivity. Using novel DCM leave-one-out cross-validation, we show that the most consistent out-of-sample predictions of the state of consciousness come from a key set of frontoparietal connections. This finding also generalises to unseen data collected during post-anaesthetic recovery. Our findings provide new, computational evidence for the importance of the posterior hot zone in explaining the loss of consciousness, highlighting also the distinct role of frontoparietal connectivity in underpinning conscious responsiveness, and consequently, suggest a dissociation between the mechanisms most prominently associated with explaining the contrast between conscious awareness and unconsciousness, and those maintaining consciousness.
Accessibility: Document exists in file
Language:
eng
Author:
Ihalainen, R.
Secondary author(s):
Gosseries, O., de Steen, F. V., Raimondo, F., Panda, R., Bonhomme, V., Marinazzo, D., Bowman, H., Laureys, S., Chennu, S.
Document type:
Article
Number of reproductions:
3
Reference:
Ihalainen, R., Gosseries, O., de Steen, F. V., Raimondo, F., Panda, R., Bonhomme, V., Marinazzo, D., Bowman, H., Laureys, S., & Chennu, S. (2021). How hot is the hot zone? Computational modelling clarifies the role of parietal and frontoparietal connectivity during anaesthetic-induced loss of consciousness. Neuroimage, 231: 117841. https://doi.org/10.1016/j.neuroimage.2021.117841
2-year Impact Factor: 6.556|2020
Impact factor notes: Impact factor not available yet for 2021
Times cited: 21|2025-09-20
Indexed document: Yes
Quartile: Q1
Keywords: Anaesthesia / Consciousness / EEG / Effective connectivity / Dynamic causal modelling

How hot is the hot zone? Computational modelling clarifies the role of parietal and frontoparietal connectivity during anaesthetic-induced loss of consciousness

How hot is the hot zone? Computational modelling clarifies the role of parietal and frontoparietal connectivity during anaesthetic-induced loss of consciousness
DocumentDepth of sedation with dexmedetomidine increases transcranial magnetic stimulation-evoked potential amplitude non-linearly2023

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: NDE
Location: Arquivo PCA - Pasta 1/Outros Apoios
Title:
Characterization of “Near-Death Experiences” through the comparison of experiencers and non-experiencers’ particularities: inter-individual differences in cognitive characteristics and susceptibility to false memories
Duration: 2016-03 - 2019-03
Researcher(s):
Steven Laureys, Charlotte Martial, Vanessa Charland-Verville, Héléna Cassol
Institution(s): Coma Science Group, University of Liège (Belgium)
Contents: Application
Research Funding Agreement
Progress report
Final report
Articles
Language: eng
Author:
Laureys, S.
Number of reproductions:
3
Keywords:
Parapsychology and Psychophysiology / Near-death experience / Functional magnetic resonance imaging (fMRI)

Reference code: NDE-122
Location: BF-GMS
Title:
Depth of sedation with dexmedetomidine increases transcranial magnetic stimulation-evoked potential amplitude non-linearly
Publication year: 2023
URL:
https://linkinghub.elsevier.com/retrieve/pii/S0007-0912(23)00347-1
Abstract/Results: ABSTRACT:
Background: Cortical excitability is higher in unconsciousness than in wakefulness, but it is unclear how this relates to anaesthesia. We investigated cortical excitability in response to dexmedetomidine, the effects of which are not fully known.
Methods: We recorded transcranial magnetic stimulation (TMS) and EEG in frontal and parietal cortex of 20 healthy subjects undergoing dexmedetomidine sedation in four conditions (baseline, light sedation, deep sedation, recovery). We used the first component (0-30 ms) of the TMS-evoked potential (TEP) to measure cortical excitability (amplitude), slope, and positive and negative peak latencies (collectively, TEP indices). We used generalised linear mixed models to test the effect of condition, brain region, and responsiveness on TEP indices.
Results: Compared with baseline, amplitude in the frontal cortex increased by 6.52 µV (P<0.001) in light sedation, 4.55 µV (P=0.003) in deep sedation, and 5.03 µV (P<0.001) in recovery. Amplitude did not change in the parietal cortex. Compared with baseline, slope increased in all conditions (P<0.02) in the frontal but not parietal cortex. The frontal cortex showed 5.73 µV higher amplitude (P<0.001), 0.63 µV ms-1 higher slope (P<0.001), and 2.2 ms shorter negative peak latency (P=0.001) than parietal areas. Interactions between dexmedetomidine and region had effects over amplitude (P=0.004) and slope (P=0.009), with both being higher in light sedation, deep sedation, and recovery compared with baseline.
Conclusions: Transcranial magnetic stimulation-evoked potential amplitude changes non-linearly as a function of depth of sedation by dexmedetomidine, with a region-specific paradoxical increase. Future research should investigate other anaesthetics to elucidate the link between cortical excitability and depth of sedation.
Accessibility: Document does not exist in file
Language:
eng
Author:
Cardone, P.
Secondary author(s):
Bodart, O., Kirsch, M., Sanfilippo, J., Virgillito, A., Martial, C., Simon, J., Wannez, S., Sanders, R. D., Laureys, S., Vandewalle, G., Bonhomme, V., Gosseries, O.
Document type:
Article
Number of reproductions:
3
Reference:
Cardone, P., Bodart, O., Kirsch, M., Sanfilippo, J., Virgillito, A., Martial, C., Simon, J., Wannez, S., Sanders, R. D., Laureys, S., Massimini, M., Vandewalle, G., Bonhomme, V., & Gosseries, O. (2023). Depth of sedation with dexmedetomidine increases transcranial magnetic stimulation-evoked potential amplitude non-linearly. British Journal of Anaesthesia, 131(4), 715–725. https://doi.org/10.1016/j.bja.2023.05.030
2-year Impact Factor: 9.1|2023
Times cited: 3|2025-09-26
Indexed document: Yes
Quartile: Q1
Keywords: Anaesthesia / Consciousness / Dexmedetomidine / Responsiveness / Sedation / Transcranial magnetic stimulation-evoked potential
DocumentPsychedelic research, assisted therapy and the role of the anaesthetist: A review and insights for experimental and clinical practices2024

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-2018-252
Location: BF-GMS
Title:
252 - Spiritual states induced by ayahuasca, and the involvement of the reward system
Duration: 2019-10 - 2022-09
Researcher(s):
Miguel Castelo-Branco, Gisela Lima, Miguel Raimundo, Pedro Fonseca, Carla Cavaleiro, Lorena Petrella, Célia Cabral, Antero Abrunhosa
Institution(s): Institute for Nuclear Sciences Applied to Health - ICNAS, University of Coimbra (Portugal)
Contents: Contents:
Application form
Correspondence
Research Funding Agreement
Progress report
Final report
Articles
Language: eng
Author:
Castelo-Branco, M.
Secondary author(s):
Lima, G., Raimundo, M., Fonseca, P., Cavaleiro, C., Petrella, L., Cabral, C., Abrunhosa, A.
Number of reproductions:
3
Keywords:
Ayahuasca / Dopamine and reward / Spiritual experience / Hallucinations / Psychophysiology and Parapsychology

Reference code: PT/FB/BL-2018-252.11
Location: BF-GMS
Title:
Psychedelic research, assisted therapy and the role of the anaesthetist: A review and insights for experimental and clinical practices
Publication year: 2024
URL:
https://doi.org/10.1111/bcp.16264
Abstract/Results: ABSTRACT:
Recent years have witnessed an unprecedented increase in the search for the use of psychedelics in improving physical and mental health. Anaesthesia has evolved since very early times, born from the need to eliminate pain and reduce suffering and there are reports of the use of anaesthetics to achieve mystical states since the nineteenth century. Nowadays, the renaissance of psychedelics in anaesthesia has been inspired by their potential in the treatment of chronic pain syndromes, palliative care and in the emergency department and pre-hospital care with the administration of psychedelics in cases of ischaemia, given their potential in neuroprotection. Although there are already some published protocols for the administration of psychedelics in patients with mental illness, little has been addressed concerning non-mental medical applications. In this sense, in patients with multiple comorbidities, functional limitations and polymedicated, the anaesthetist may play a fundamental role, not only in clinical practice, but also in translational research. This article focuses on the description of psychedelics, with a particular focus on dimethyltryptamine (DMT) and ayahuasca pharmacology, effects, safety and toxicity. A detailed description of the role of the anaesthetist in clinical and experimental research is provided, from participant's screening to preparation and dosing session, expected adverse effects and how to manage them, based on the protocol and standard procedures of a current study with neuroimaging during the psychedelic experience. Specific considerations regarding the management of psychedelic toxicity are also provided as well as future directions for safe psychedelic use in clinical practice.
Accessibility: Document does not exist in file
Language:
eng
Author:
Lima, G.
Secondary author(s):
Soares, C., Teixeira, M., Castelo-Branco, M.
Document type:
Article
Number of reproductions:
3
Reference:
Lima, G., Soares, C., Teixeira, M., & Castelo-Branco, M. (2024). Psychedelic research, assisted therapy and the role of the anaesthetist: A review and insights for experimental and clinical practices. British Journal of Clinical Pharmacology, 90(12), 3119–3134. https://doi.org/10.1111/bcp.16264
2-year Impact Factor: 3|2024
Times cited: 0|2025-09-27
Indexed document: Yes
Quartile: Q2
Keywords: Anaesthesia / Ayahuasca / Dimethyltryptamine / Psychedelic research / Psychedelic toxicity / Serotonin toxicity
DocumentBrain state identification and neuromodulation to promote recovery of consciousness2024

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: NDE
Location: Arquivo PCA - Pasta 1/Outros Apoios
Title:
Characterization of “Near-Death Experiences” through the comparison of experiencers and non-experiencers’ particularities: inter-individual differences in cognitive characteristics and susceptibility to false memories
Duration: 2016-03 - 2019-03
Researcher(s):
Steven Laureys, Charlotte Martial, Vanessa Charland-Verville, Héléna Cassol
Institution(s): Coma Science Group, University of Liège (Belgium)
Contents: Application
Research Funding Agreement
Progress report
Final report
Articles
Language: eng
Author:
Laureys, S.
Number of reproductions:
3
Keywords:
Parapsychology and Psychophysiology / Near-death experience / Functional magnetic resonance imaging (fMRI)

Reference code: NDE-142
Location: BF-GMS
Title:
Brain state identification and neuromodulation to promote recovery of consciousness
Publication year: 2024
URL:
https://doi.org/10.1093/braincomms/fcae362
Abstract/Results: ABSTRACT:
Experimental and clinical studies of consciousness identify brain states (i.e. quasi-stable functional cerebral organization) in a non-systematic manner and largely independent of the research into brain state modulation. In this narrative review, we synthesize advances in the identification of brain states associated with consciousness in animal models and physiological (sleep), pharmacological (anaesthesia) and pathological (disorders of consciousness) states of altered consciousness in humans. We show that in reduced consciousness the frequencies in which the brain operates are slowed down and that the pattern of functional communication is sparser, less efficient, and less complex. The results also highlight damaged resting-state networks, in particular the default mode network, decreased connectivity in long-range connections and especially in the thalamocortical loops. Next, we show that therapeutic approaches to treat disorders of consciousness, through pharmacology (e.g. amantadine, zolpidem), and (non-) invasive brain stimulation (e.g. transcranial direct current stimulation, deep brain stimulation) have shown partial effectiveness in promoting consciousness recovery. Although some features of conscious brain states may improve in response to neuromodulation, targeting often remains non-specific and does not always lead to (behavioural) improvements. The fields of brain state identification and neuromodulation of brain states in relation to consciousness are showing fascinating developments that, when integrated, might propel the development of new and better-targeted techniques for disorders of consciousness. We here propose a therapeutic framework for the identification and modulation of brain states to facilitate the interaction between the two fields. We propose that brain states should be identified in a predictive setting, followed by theoretical and empirical testing (i.e. in animal models, under anaesthesia and in patients with a disorder of consciousness) of neuromodulation techniques to promote consciousness in line with such predictions. This framework further helps to identify where challenges and opportunities lay for the maturation of brain state research in the context of states of consciousness. It will become apparent that one angle of opportunity is provided through the addition of computational modelling. Finally, it aids in recognizing possibilities and obstacles for the clinical translation of these diagnostic techniques and neuromodulation treatment options across both the multimodal and multi-species approaches outlined throughout the review.
Accessibility: Document exists in file
Language:
eng
Author:
van der Lande, G. J. M.
Secondary author(s):
Casas-Torremocha, D., Manasanch, A., Dalla Porta, L., Gosseries, O., Alnagger, N., Barra, A., Mejías, J. F., Panda, R., Riefolo, F., Thibaut, A., Bonhomme, V., Thirion, B., Clasca, F., Gorostiza, P., Sanchez-Vives, M. V., Deco, G., Laureys, S., Zamora-López, G., Annen, J.
Document type:
Article
Number of reproductions:
3
Reference:
van der Lande, G. J. M., Casas-Torremocha, D., Manasanch, A., Dalla Porta, L., Gosseries, O., Alnagger, N., Barra, A., Mejías, J. F., Panda, R., Riefolo, F., Thibaut, A., Bonhomme, V., Thirion, B., Clasca, F., Gorostiza, P., Sanchez-Vives, M. V., Deco, G., Laureys, S., Zamora-López, G., & Annen, J. (2024). Brain state identification and neuromodulation to promote recovery of consciousness. Brain Communications, 6(5), fcae362. https://doi.org/10.1093/braincomms/fcae362
2-year Impact Factor: 4.5|2024
Times cited: 7|2025-09-27
Indexed document: Yes
Quartile: Q1
Keywords: (disorders of) Consciousness / Anaesthesia / Animal models / Brain states / Neuromodulation

Brain state identification and neuromodulation to promote recovery of consciousness

Brain state identification and neuromodulation to promote recovery of consciousness