Tsuji Y, Nagasawa K, Satoh H
Department of Electrical Engineering, Ashikaga Institute of Technology, Tochigi, Japan.
Psychiatry Clin Neurosci. 1998 Apr;52(2):174-6. doi: 10.1111/j.1440-1819.1998.tb01014.x.
The cross-correlation function between diurnal changes in 1/f-like fluctuations of the R-R interval and those of the sleep-waking stage was calculated based on the data from six normal subjects in order to investigate the interactions among circadian components. Sleep stage was scored according to the standard criteria and waking stage was scored with criteria developed for the present study. Polysomnography was performed for 11 h during the daytime. The equation for 1/f was approximated using the power spectra of the R-R interval every 10 min. Cross-correlation analysis between sleep-waking stage and 1/f fluctuation of the R-R interval suggested that the neural network for 1/f fluctuation in heartbeat is influenced by the sleep-wake cycle with a time lag in the order of tens of minutes.
为了研究昼夜节律成分之间的相互作用，基于六名正常受试者的数据，计算了RR间期的1/f样波动的昼夜变化与睡眠-觉醒阶段的昼夜变化之间的互相关函数。睡眠阶段根据标准标准进行评分，觉醒阶段根据本研究制定的标准进行评分。在白天进行了11小时的多导睡眠图检查。使用每10分钟RR间期的功率谱对1/f方程进行近似。睡眠-觉醒阶段与RR间期的1/f波动之间的互相关分析表明，心跳中1/f波动的神经网络受到睡眠-觉醒周期的影响，存在数十分钟量级的时间滞后。
