Zulley J, Campbell S S
Hum Neurobiol. 1985;4(2):123-6.
Patterns of sleep and wakefulness exhibited in an environment without time cues are generally considered to be monophasic, with a distinct relationship between sleep episodes and the minimum of body core temperature. In some cases this relationship between major sleep episodes and temperature becomes replaced by an apparently varying phase relationship between the two variables called "spontaneous internal desynchronization". In the present study the sleep-wake and temperature data of six subjects living in an environment without time cues and exhibiting internal desynchronization were reanalyzed to include subjectively designated naps. Two groups of naps were identified based on their phase positions relative to temperature, with one group occurring around the temperature minimum and another group clustering approximately halfway between successive minima. The results support the suggestion that neither monophasic sleep placement nor sleep patterns typically associated with spontaneous internal desynchronization reflect biological sleep tendency. Rather, sleep tendency is reflected more accurately by the bimodal sleep patterns exhibited by subjects who are allowed to time their sleep and waking with no restrictions.
在没有时间线索的环境中表现出的睡眠和清醒模式通常被认为是单相的，睡眠阶段与身体核心温度最低点之间存在明显的关系。在某些情况下，主要睡眠阶段与温度之间的这种关系会被这两个变量之间明显变化的相位关系所取代，这种关系被称为“自发内部去同步化”。在本研究中，对六名生活在没有时间线索的环境中且表现出内部去同步化的受试者的睡眠-清醒和温度数据进行了重新分析，以纳入主观指定的小睡。根据小睡相对于温度的相位位置确定了两组小睡，一组出现在温度最低点附近，另一组则聚集在连续最低点之间的大约中间位置。结果支持了这样的观点，即单相睡眠安排或通常与自发内部去同步化相关的睡眠模式都不能反映生物睡眠倾向。相反，睡眠倾向更准确地反映在那些被允许无限制地安排睡眠和清醒时间的受试者所表现出的双峰睡眠模式中。
