Document Detail


Identification of nonstationary dynamics in physiological recordings.
MedLine Citation:
PMID:  10933239     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We present a novel framework for the analysis of time series from dynamical systems that alternate between different operating modes. The method simultaneously segments and identifies the dynamical modes by using predictive models. In extension to previous approaches, it allows an identification of smooth transition between successive modes. The method can be used for analysis, diagnosis, prediction, and control. In an application to EEG and respiratory data recorded from humans during afternoon naps, the obtained segmentations of the data agree with the sleep stage segmentation of a medical expert to a large extent. However, in contrast to the manual segmentation, our method does not require a priori knowledge about physiology. Moreover, it has a high temporal resolution and reveals previously unclassified details of the transitions. In particular, a parameter is found that is potentially helpful for vigilance monitoring. We expect that the method will generally be useful for the analysis of nonstationary dynamical systems, which are abundant in medicine, chemistry, biology and engineering.
Authors:
J Kohlmorgen; K R Müller; J Rittweger; K Pawelzik
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biological cybernetics     Volume:  83     ISSN:  0340-1200     ISO Abbreviation:  Biol Cybern     Publication Date:  2000 Jul 
Date Detail:
Created Date:  2000-11-09     Completed Date:  2000-12-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7502533     Medline TA:  Biol Cybern     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  73-84     Citation Subset:  IM    
Affiliation:
GMD FIRST, Berlin, Germany. jek@first.gmd.de
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MeSH Terms
Descriptor/Qualifier:
Electroencephalography*
Humans
Markov Chains
Models, Neurological*
Respiration
Sleep Stages / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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