Hamann Claudia, Bartsch Ronny P, Schumann Aicko Y, Penzel Thomas, Havlin Shlomo, Kantelhardt Jan W
Institut für Physik, Technische Universitat Ilmenau, Ilmenau, Germany.
Chaos. 2009 Mar;19(1):015106. doi: 10.1063/1.3096415.
Phase synchronization between two weakly coupled oscillators has been studied in chaotic systems for a long time. However, it is difficult to unambiguously detect such synchronization in experimental data from complex physiological systems. In this paper we review our study of phase synchronization between heartbeat and respiration in 150 healthy subjects during sleep using an automated procedure for screening the synchrograms. We found that this synchronization is significantly enhanced during non-rapid-eye-movement (non-REM) sleep (deep sleep and light sleep) and is reduced during REM sleep. In addition, we show that the respiration signal can be reconstructed from the heartbeat recordings in many subjects. Our reconstruction procedure, which works particularly well during non-REM sleep, allows the detection of cardiorespiratory synchronization even if only heartbeat intervals were recorded.
混沌系统中两个弱耦合振荡器之间的相位同步已经被研究了很长时间。然而，从复杂生理系统的实验数据中明确检测出这种同步是困难的。在本文中，我们回顾了我们对150名健康受试者睡眠期间心跳与呼吸之间相位同步的研究，该研究使用了一种自动筛选同步图的程序。我们发现，这种同步在非快速眼动（non-REM）睡眠（深度睡眠和浅睡眠）期间显著增强，而在快速眼动睡眠期间则减弱。此外，我们表明，在许多受试者中，可以从心跳记录重建呼吸信号。我们的重建程序在非快速眼动睡眠期间效果特别好，即使只记录了心跳间期，也能检测到心肺同步。
