Phase-resetting action of light on the circadian activity rhythm of Rattus exulans.
Phase-resetting action of light on the circadian activity rhythm of Rattus exulans.
复制标题
光对黄毛鼠昼夜节律的相位重置作用。
DOI：
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发表时间：
1983
影响因子：
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通讯作者：
R. D. Lewis
中科院分区：
文献类型：
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作者：
P. Gander;R. D. Lewis
在野生捕获的波利尼西亚大鼠（Rattus exulans）中研究了光对运动活动昼夜节律的相位重置作用。推导出了对4小时、8小时和16小时光脉冲的相位响应曲线。所有三条曲线都符合这样的概括，即在主观白天晚期和主观夜晚早期发生的脉冲产生延迟，而前进响应于与主观夜晚晚期和主观白天早期重合的脉冲而发生。弱（类型1）的相位复位观察响应于4小时的脉冲，也许8小时的脉冲，而强（类型0）的复位显然发生在响应于16小时的脉冲。这些数据显然构成了哺乳动物昼夜节律中强相位重置的第一份报告。一个夹带的活动节奏和光暗周期之间的相位关系是依赖于光周期，在24小时的周期，在节奏和授时因子之间的周期差。在较长的授时因子周期中，光的直接掩蔽效应延迟了活动的开始。一个主要的非参数作用的光在自然夹带是一致的，这些数据和实地观察。
The phase resetting action of light on the circadian rhythm of locomotor activity has been examined in wild-caught Polynesian rats (Rattus exulans). Phase-response curves to 4-, 8-, and 16-h light pulses have been derived. All three curves conform to the generalization that pulses occurring during late subjective day and early subjective night produce delays, whereas advances occur in response to pulses coinciding with the late subjective night and early subjective day. Weak (type 1) phase resetting is observed in response to 4-h pulses and perhaps 8-h pulses, whereas strong (type 0) resetting apparently occurs in response to 16-h pulses. These data evidently constitute the first report of strong phase resetting in mammalian circadian rhythms. The phase relationship between an entrained activity rhythm and the light-dark cycle is dependent on the photoperiod and, in 24-h cycles, on the period difference between the rhythm and the zeitgeber. In longer zeitgeber cycles, activity onset is delayed by a direct masking effect of light. A primarily nonparametric action of light in natural entrainment is consistent with these data and with field observations.