Erkert H G, Gröber J
Folia Primatol (Basel). 1986;47(4):171-88. doi: 10.1159/000156276.
The activity pattern of Aotus lemurinus griseimembra can be predictably altered by varying the illuminance during the dark phase of a 12:12-hour light:dark rhythm. Intensities well below full-moon brightness (0.1-0.5 lx) severely inhibit activity. This modulation is not the result of a light-induced phase shift of the circadian rhythm, but it is primarily caused by masking due to direct effects of light on the motor system. Both proportional and differential effects of light are involved. Miniature transmitters were implanted intraperitoneally in two Aotus females so that the core temperature could be measured in parallel with locomotor activity. The responses to brief reductions of the dark-phase illuminance, from 10(-1) to 10(-3) lx, 10(-5) lx or physiological darkness, indicate that the direct effects of light that modulate the activity of the owl monkeys also affect their temperature time-course. The influence on the temperature rhythm, unlike that on the activity rhythm, varies greatly over the circadian period. The finding that the core temperature does not always change in parallel with locomotor activity and, to some extent, reacts differently to the light:dark alternation indicates that temperature does not simply follow activity passively, but rather is partially subject to a 'direct' masking influence of the light.
在12:12小时光照:黑暗节律的黑暗阶段改变光照强度，可以可预测地改变灰手夜猴的活动模式。远低于满月亮度（0.1 - 0.5勒克斯）的强度会严重抑制活动。这种调节不是昼夜节律的光诱导相移的结果，而是主要由光对运动系统的直接影响导致的掩盖效应引起的。光的比例效应和差异效应都有涉及。将微型发射器腹腔内植入两只雌性灰手夜猴体内，以便能够同时测量核心体温和运动活动。对黑暗阶段光照强度从10⁻¹勒克斯短暂降至10⁻³勒克斯、10⁻⁵勒克斯或生理性黑暗的反应表明，调节夜猴活动的光的直接效应也会影响它们的体温变化过程。与对活动节律的影响不同，对温度节律的影响在昼夜周期内变化很大。核心体温并不总是与运动活动平行变化，并且在某种程度上对光照:黑暗交替的反应不同，这一发现表明体温并非简单地被动跟随活动，而是部分受到光的“直接”掩盖影响。
