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BIAL Foundation
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DE:"Binary classification"
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Type Title Begin End
DocumentSleep stage transition dynamics reveal specific stage 2 vulnerability in insomnia2017

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: Visitante: / 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-2012-252
Location: SEC PCA 252/12
Title:
252 - Sleep state misperception mispercieved
Duration: 2014-06 - 2017-01
Researcher(s):
Eus J. W. Van Someren, J. Ramautar
Institution(s): Netherlands Institute for Neuroscience, Dept. Sleep & Cognition, Amsterdam (The Netherlands)
Contents: Contents:
Application form
Correspondence
Progress reports
Final reports
2 Articles
Language: eng
Author:
Van Someren, E.
Secondary author(s):
Ramautar, J.
Number of reproductions:
1
Keywords:
Psychophysiology / Sleep and dreams / Biopsychological problems / Mental health / Sleep disorders / Brain structure and function / Cognitive processes / Memory / Consciousness

Reference code: PT/FB/BL-2012-252.05
Location: SEC PCA 252/12
Title:
Sleep stage transition dynamics reveal specific stage 2 vulnerability in insomnia
Publication year: 2017
URL:
Visitante: / https://academic.oup.com/sleep/article-abstract/40/9/zsx117/3926054?redirectedFrom=fulltext
Abstract/Results: ABSTRACT:
STUDY OBJECTIVES:
Objective sleep impairments in insomnia disorder (ID) are insufficiently understood. The present study evaluated whether whole-night sleep stage dynamics derived from polysomnography (PSG) differ between people with ID and matched controls and whether sleep stage dynamic features discriminate them better than conventional sleep parameters.
METHODS:
Eighty-eight participants aged 21-70 years, including 46 with ID and 42 age- and sex-matched controls without sleep complaints, were recruited through www.sleepregistry.nl and completed two nights of laboratory PSG. Data of 100 people with ID and 100 age- and sex-matched controls from a previously reported study were used to validate the generalizability of findings. The second night was used to obtain, in addition to conventional sleep parameters, probabilities of transitions between stages and bout duration distributions of each stage. Group differences were evaluated with nonparametric tests.
RESULTS:
People with ID showed higher empirical probabilities to transition from stage N2 to the lighter sleep stage N1 or wakefulness and a faster decaying stage N2 bout survival function. The increased transition probability from stage N2 to stage N1 discriminated people with ID better than any of their deviations in conventional sleep parameters, including less total sleep time, less sleep efficiency, more stage N1, and more wake after sleep onset. Moreover, adding this transition probability significantly improved the discriminating power of a multiple logistic regression model based on conventional sleep parameters.
CONCLUSIONS:
Quantification of sleep stage dynamics revealed a particular vulnerability of stage N2 in insomnia. The feature characterizes insomnia better than-and independently of-any conventional sleep parameter.
Accessibility: Document does not exist in file
Language:
eng
Author:
Wei, Y.
Secondary author(s):
Colombo, M., Ramautar, J., Blanken, T. F., Van Der Werf, Y. D., Spiegelhalder, K., Feige, B., Riemann, D., Van Someren, E.
Document type:
Article
Number of reproductions:
1
Percentiles:
93.06|2.43
Reference:
Wei, Y., Colombo, M. A., Ramautar, J. R., Blanken, T. F., van der Werf, Y. D., ..., Van Someren, E. (2017). Sleep stage transition dynamics reveal specific stage 2 vulnerability in insomnia. Sleep, 40(9), zsx117. https://doi.org/10.1093/sleep/zsx117
Impact Factor: 5.135|2017
Times cited: 73|2026-02-08
Indexed document: Yes
Quartile: Q1
Keywords: Markov chain / Binary classification / Feature selection / Hypnogram / Insomnia disorder / non-REM sleep / Polysomnography / Sleep architecture / Sleep fragmentation / Sleep stage