Berger R J, Phillips N H
Department of Biology, Sinsheimer Laboratories, University of California, Santa Cruz 95064.
Am J Physiol. 1994 Oct;267(4 Pt 2):R945-52. doi: 10.1152/ajpregu.1994.267.4.R945.
Sleep patterns and circadian rhythms of body temperature, activity, body weight, and electroencephalographic (EEG) power spectra of pigeons were compared among three photic conditions: a 12:12-h light-dark cycle (LD), followed successively by constant bright (LL) and dim light (DD) periods. LL suppressed non-rapid-eye-movement and rapid eye movement sleep and circadian rhythms of the measured variables without producing increased drowsiness or other physiological or behavioral changes. Sleep patterns after LL-DD transitions also showed no evidence of prior sleep deprivation during LL. Sleep latency after LL-DD transitions was 93 min longer than after L-D transitions in LD. Total sleep and EEG slow wave activity during the first 24 h in DD did not differ from D in LD. Free-running circadian rhythms subsequently reappeared in DD after LL.
在三种光照条件下比较了鸽子的睡眠模式以及体温、活动、体重和脑电图（EEG）功率谱的昼夜节律：12:12小时的明暗循环（LD），随后依次是持续明亮（LL）和昏暗（DD）时段。LL抑制了非快速眼动和快速眼动睡眠以及所测变量的昼夜节律，且未导致嗜睡增加或其他生理或行为变化。LL-DD转换后的睡眠模式也未显示在LL期间有先前睡眠剥夺的迹象。LL-DD转换后的睡眠潜伏期比LD中L-D转换后的长93分钟。DD中前24小时的总睡眠时间和EEG慢波活动与LD中的D无差异。LL后，自由运行的昼夜节律随后在DD中重新出现。
