Journal
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
Volume 283, Issue 3-4, Pages 451-461Publisher
ELSEVIER
DOI: 10.1016/S0378-4371(00)00204-1
Keywords
coupling; synchronization; frequency modulation; cardiorespiratory system
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We analyse phase and frequency synchronization in the human cardio-respiratory system. The method for analysis of noisy nonstationary bivariate data is applied to simultaneously measured cardiac and respiratory activity. Short epochs of phase and/or frequency locking between respiratory and cardiac rhythms are detected in healthy relaxed subjects (non-athletes). We reveal that the strength of phase synchronization is inversely related to the extent of respiratory modulation of the heart rate. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
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