Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article Interactions between Uterine EMG at Different Sites Investigated Using Wavelet Analysis: Comparison of Pregnancy and Labor Contractions | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID918012 9 pages doi 2010 918012 Research Article Interactions between Uterine EMG at Different Sites Investigated Using Wavelet Analysis Comparison of Pregnancy and Labor Contractions Mahmoud Hassan 1 2 Jeremy Terrien 2 Brynjar Karlsson 2 3 and Catherine Marque1 1 UMR CNRS 6600 Biomecanique et Bio-ingenierie Université de Technologie de Compiegne 60200 Compi egne France 2 School of Science and Engineering Reykjavik University Menntavegur 1 101 Reykjavik Iceland 3 Institute of Physiology University of Iceland Sxmundargotu 2 101 Reykjavik Iceland Correspondence should be addressed to Mahmoud Hassan Received 30 December 2009 Revised 22 March 2010 Accepted 6 May 2010 Academic Editor Aydin Akan Copyright 2010 Mahmoud Hassan et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. This paper describes the use of the Morlet wavelet transform to investigate the difference in the time-frequency plane between uterine EMG signals recorded simultaneously on two different sites on women s abdomen both during pregnancy and in labor. The methods used are wavelet transform cross wavelet transform phase amplitude correlation and phase synchronization. We computed the linear relationship and phase synchronization between uterine signals measured during the same contractions at two different sites on data obtained from women during pregnancy and labor. The results show that the Morlet wavelet transform can successfully analyze and quantify the relationship between uterine electrical activities at different sites and could be employed to investigate the evolution of uterine contraction from pregnancy to labor. 1. Introduction There are many open questions concerning the functioning of the human .
