van Woerden E E, van Geijn H P, Swartjes J M, Caron F J, Brons J T, Arts N F
Department of Obstetrics and Gynecology, Academisch Ziekenhuis Vrije Universiteit, Amsterdam, The Netherlands.
Eur J Obstet Gynecol Reprod Biol. 1988 May;28(1):29-38. doi: 10.1016/0028-2243(88)90057-3.
Behavioural state 1F (quiet sleep) of the term fetus is defined on the basis of absence of eye and body movements, and the presence of a specific heart rate pattern (FHRP A), characterized by a stable heart rate with a small oscillation bandwidth. In the present paper the fetal heart rate pattern was studied in 39 enclosed periods with absence of fetal eye and body movements. In 37 periods the heart rate pattern met the criteria of FHRP A. Within FHRP A various distinct types of heart rhythm could be distinguished related to presence of breathing or regular mouthing and complete absence of movements. The bandwidth in the various heart rhythms differed significantly and was largest during breathing movements. During regular mouthing an oscillatory pattern was present with a frequency similar to the frequency of the clusters of mouthing movements. In 2 periods the heart rate deviated from the definition for FHRP A, i.e. a sinusoidal-like rhythm associated with sucking movements. These observations demonstrate the strong association between the fetal heart rate pattern and fetal movements during behavioural state 1F.
足月儿胎儿的行为状态1F（安静睡眠）是根据无眼动和身体运动以及特定心率模式（FHRP A）的存在来定义的，其特征是心率稳定且振荡带宽小。在本文中，对39个胎儿无眼动和身体运动的封闭时间段内的胎儿心率模式进行了研究。在37个时间段内，心率模式符合FHRP A的标准。在FHRP A范围内，可以区分出与呼吸或规律的咂嘴动作以及完全无运动相关的各种不同类型的心律。不同心律的带宽差异显著，且在呼吸运动期间最大。在规律咂嘴期间，存在一种振荡模式，其频率与咂嘴动作簇的频率相似。在2个时间段内，心率偏离了FHRP A的定义，即与吸吮动作相关的正弦样节律。这些观察结果表明，在行为状态1F期间，胎儿心率模式与胎儿运动之间存在密切关联。
