Synchronization in the bivariate intrauterine pressure signals' nonlinear dynamics methods.
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.
Oczeretko
Edward
E
Department of Medical Informatics, University of Białystok, Białystok, Poland. eddoczer@ii.uwb.edu.pl
Borowska
Marta
M
Kitlas
Agnieszka
A
Laudanski
Piotr
P
Laudanski
Tadeusz
T
D005260:Female; D006801:Humans; D017711:Nonlinear Dynamics; D011247:Pregnancy; D013997:Time Factors; D014590:Uterine Contraction / Q000502:physiology*; D014599:Uterus / Q000502:physiology*