Shortening of the photoperiod affects sleep distribution, EEG and cortical temperature in the Djungarian hamster
Shortening of the photoperiod affects sleep distribution, EEG and cortical temperature in the Djungarian hamster
复制标题
光周期缩短影响正加仓鼠的睡眠分布、脑电图和皮质温度
DOI：
10.1007/bf00192315
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
I. Tobler
中科院分区：
文献类型：
--
作者：
T. Deboer;I. Tobler
为探讨光周期对睡眠调节的影响，连续记录了适应短光周期（光暗8∶16）的准噶尔仓鼠（Phodopussungorus）的脑电图（EEG）、肌电图（EMG）和皮层温度，并记录了两个基线日和4 h睡眠剥夺后的脑电图（EEG）、肌电图（EMG）和皮层温度。与以往在长光周期（光∶暗16∶8）条件下收集的数据比较，发现光周期的几个主要效应：1。一个显着的变化，在24小时的分布，持续时间和数量的警觉状态发作，而睡眠和清醒的总量是不变的; 2。皮层温度在短光周期下降低0.7°C; 3.皮层温度与REM睡眠发作频率呈显著负相关;绝对EEG功率密度显示出显着减少，在短光周期。在睡眠剥夺后，NREM睡眠中的EEG慢波活动（平均功率密度0.75-4.0 Hz）在两个光周期中显示出显著相似的增加，证明了睡眠的稳态调节的稳健性。皮层温度保持在基线值以上的睡眠剥夺后，在短光周期，而负反弹是在长光周期。我们的研究结果支持了这一假设，即皮层温度有很强的影响REM睡眠倾向，并表明一个最佳的皮层温度恢复睡眠后睡眠剥夺的可能性。短光周期下较低的脑电功率密度可能有助于能量节约。
To asses the influence of photoperiod on sleep regulation EEG, EMG, and cortical temperature were continuously recorded for two baseline days and after 4 h sleep deprivation in Djungarian hamsters (Phodopus sungorus) adapted to a short photoperiod (light dark 8∶16). Comparison to previous data collected in a long photoperiod (light∶dark 16∶8) showed several major effects of photoperiod: 1. A prominent change in the 24-h distribution, duration and number of vigilance state episodes, whereas the total amount of sleep and waking was unchanged; 2. Cortical temperature was 0.7°C lower in the short photoperiod; 3. There was a significant negative correlation between cortical temperature and the frequency of REM sleep episodes; and 4. Absolute EEG power density showed a marked reduction in the short photoperiod. After sleep deprivation EEG slow-wave activity (mean power density 0.75–4.0 Hz) in NREM sleep showed a remarkably similar increase in both photoperiods demonstrating the robustness of the homeostatic regulation of sleep. Cortical temperature remained above baseline values after sleep deprivation in the short photoperiod whereas a negative rebound was present in the long photoperiod. Our results support the hypothesis that cortical temperature has a strong influence on REM sleep propensity and indicate the possibility of an optimum cortical temperature for recovery sleep after sleep deprivation. The lower EEG power density in the short photoperiod may contribute to energy conservation.
影响因子：
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作者：
KRILOWICZ, BL;GLOTZBACH, SF;HELLER, HC
通讯作者：
HELLER, HC
影响因子：
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作者：
BITTMAN, EL;BARTNESS, TJ;DEVRIES, GJ
通讯作者：
DEVRIES, GJ