冥想时心率波动的长程相关性分析
Breakdown of Long-Range Correlations in Heart Rate Fluctuations During Meditation
摘要：
采用平均小波系数法研究了冥想时心率变异性的标度特性。虽然周期性在短时间间隔内主导心率时间序列的行为，但在较长的时间尺度上，冥想引起的信号相关性变得明显较弱。通过在自然时域中的熵分析对这些相关性的进一步研究表明，诱导的精神放松在更大的尺度上引入了大量的复杂性损失，这表明所涉及的生理机制发生了变化。
英文摘要：
The average wavelet coefficient method is applied to investigate the scaling features of heart rate variability during meditation, a state of induced mental relaxation. While periodicity dominates the behavior of the heart rate time series at short intervals, the meditation induced correlations in the signal become significantly weaker at longer time scales. Further study of these correlations by means of an entropy analysis in the natural time domain reveals that the induced mental relaxation introduces substantial loss of complexity at larger scales, which indicates a change in the physiological mechanisms involved.
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