Schäfer C, Rosenblum M G, Abel H H, Kurths J
Department of Physics, Potsdam University, Am Neuen Palais 10, Postfach 601553, D-14415 Potsdam, Germany.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Jul;60(1):857-70. doi: 10.1103/physreve.60.857.
We investigate synchronization between cardiovascular and respiratory systems in healthy humans under free-running conditions. For this aim we analyze nonstationary irregular bivariate data, namely, electrocardiograms and measurements of respiratory flow. We briefly discuss a statistical approach to synchronization in noisy and chaotic systems and illustrate it with numerical examples; effects of phase and frequency locking are considered. Next, we present and discuss methods suitable for the detection of hidden synchronous epochs from such data. The analysis of the experimental records reveals synchronous regimes of different orders n:m and transitions between them; the physiological significance of this finding is discussed.
我们研究了自由活动状态下健康人体心血管系统与呼吸系统之间的同步性。为此，我们分析了非平稳不规则双变量数据，即心电图和呼吸流量测量值。我们简要讨论了一种用于噪声和混沌系统同步性的统计方法，并用数值示例进行说明；考虑了相位和频率锁定的影响。接下来，我们介绍并讨论适用于从此类数据中检测隐藏同步时段的方法。对实验记录的分析揭示了不同阶数n:m的同步状态及其之间的转换；并讨论了这一发现的生理意义。
