New variables for defining sleep continuity
New variables for defining sleep continuity
复制标题
定义睡眠连续性的新变量
DOI：
10.1016/0031-9384(93)90289-r
复制
发表时间：
1993
影响因子：
2.9
通讯作者：
J. Gaillard
中科院分区：
文献类型：
--
作者：
H. Merica;R. Blois;P. Bovier;J. Gaillard
One very synthetic way to represent a night's sleep is by way of a hypnogram: a graphical representation of the sleep stages as a function of time. The hypnogram is generally quantified by a series of variables that measure the durations and latencies of the various sleep stages including wake. These variables, however, do not fully account for all the information contained in the hypnogram, in particular information on sleep continuity. A series of variables that measure and localize disruption of this continuity are proposed and their utility validated on three groups of patients presenting sleep disorders. Utility is established if the variable is capable of differentiating between patients and healthy controls. Two sets of variables are examined: those that use the entire sleep period as unit of measurement, and those that are measured within each consecutive NREM-REM sleep cycle. The results show that the variables proposed are able to differentiate between groups and, therefore, are useful measures reflecting the hypnogram more precisely. They also show that fragmentation of REM sleep does not present a systematic trend across the night, but that fragmentation of NREM sleep goes up linearly.
