title: Synchronization in the bivariate intrauterine pressure signals' nonlinear dynamics methods.
abstract: It was shown earlier that nonlinear processes probably generate uterine contractions. In this study, the nonlinear synchronization measures (the mutual correlation dimension, the cross-approximate entropy, the mutual information and the nonlinear interdependencies) were employed to analyze the association between two time series representing the uterine contraction activity. Here the notion of synchronization is used in a loose sense as the synonym of correlation, the similarity of the signals or the similarity of their dynamics. The signals were recorded from the different topographic regions of the uterus: the cervix and the fundus. The results obtained by means of different algorithms are different but qualitatively similar for the checked methods.
authors.affiliation: Department of Medical Informatics, University of Białystok, Białystok, Poland. eddoczer@ii.uwb.edu.pl
authors.forename: Edward
authors.initials: E
authors.lastname: Oczeretko
authors.forename: Marta
authors.initials: M
authors.lastname: Borowska
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Kitlas
authors.forename: Piotr
authors.initials: P
authors.lastname: Laudanski
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Laudanski
mesh_terms: D005260:Female; D006801:Humans; D017711:Nonlinear Dynamics; D011247:Pregnancy; D013997:Time Factors; D014590:Uterine Contraction / Q000502:physiology*; D014599:Uterus / Q000502:physiology*