Jenni Oskar G, Deboer Tom, Achermann Peter
Growth and Development Center, University Children's Hospital Zürich, Steinwiesstrasse 75, CH-8032 Zürich, Switzerland.
Infant Behav Dev. 2006 Apr;29(2):143-52. doi: 10.1016/j.infbeh.2005.11.001. Epub 2005 Nov 28.
The development of the 24-h rest-activity pattern was investigated in human infants under naturalistic conditions as assessed by continuous actigraphy. Seven infants and their mothers were recorded for 4 (n=1), 6 (n=5) and 12 months (n=1) after birth. Periodogram analysis of rest-activity data was performed over consecutive 10-day intervals. A weak 24-h rest-activity pattern was already present in some infants during the newborn period. The magnitude of the 24-h component in individual periodograms increased across the first months following a saturating function. The time constants of fitted saturating exponential functions--reflecting the rate of development of the 24-h pattern--ranged from 49 to 110 days (n=6) indicating a large interindividual variability. Furthermore, intraindividual variation was observed; the magnitude of the 24-h rest-activity component showed fluctuations around the trend. Miniaturized actigraphs are ideal tools for long-term longitudinal monitoring of rest-activity behavior in infants.
通过连续的活动记录仪评估，在自然条件下对人类婴儿24小时休息 - 活动模式的发展进行了研究。记录了7名婴儿及其母亲在出生后4个月（n = 1）、6个月（n = 5）和12个月（n = 1）的数据。对休息 - 活动数据的周期图分析是在连续的10天间隔内进行的。在新生儿期，一些婴儿已经出现了较弱的24小时休息 - 活动模式。在出生后的头几个月里，各个周期图中24小时成分的幅度按照饱和函数增加。拟合饱和指数函数的时间常数（反映24小时模式的发展速度）范围为49至110天（n = 6），表明个体间存在很大差异。此外，还观察到个体内部的变化；24小时休息 - 活动成分的幅度围绕趋势呈现波动。小型化活动记录仪是长期纵向监测婴儿休息 - 活动行为的理想工具。
