In jumping spiders (Salticidae), the vigilance decrement, or decrease in response to a repeated visual stimulus over time, directly parallels that found in humans. Explanations for the vigilance decrement in the human literature are heavily mentalistic and central nervous system (CNS) based, whereas response decrements in invertebrates are typically thought of as habituation at the sensory periphery. Here we explored whether the salticid vigilance decrement could be CNS modulated by using caffeine, which is a well-known CNS stimulant for both vertebrates and invertebrates. We used paired tests in which Trite planiceps Simon spiders were randomly given a drop of either caffeinated water or distilled water and were then shown dot stimuli presented on monitors. We measured both general "walking," or activity, as a control for physical fatigue, and optomotor responses to the stimuli. We found that the vigilance decrement was significantly shallower (i.e., spiders were more responsive for longer) when spiders were administered caffeine compared with water; furthermore, these spiders were also generally more active throughout the testing period and thus were not physically impaired. Our results suggest that, in at least some invertebrates, CNS modulation of the vigilance decrement is likely. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

中文翻译：

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咖啡因会影响Trite Planiceps跳跃蜘蛛（Salticidae）的警惕性降低。

在跳跃的蜘蛛（Salticidae）中，警惕性随着时间的推移而减少，或随着对重复视觉刺激的响应而减小，与人类发现的情况直接相似。人类文献中警惕性下降的解释主要基于心理和中枢神经系统（CNS），而无脊椎动物的反应性下降通常被认为是感觉周围的习惯。在这里，我们探讨了使用咖啡因是否可以调节中枢神经系统的警惕性，而咖啡因是脊椎动物和无脊椎动物中众所周知的中枢神经系统兴奋剂。我们使用了配对测试，在这些测试中，随机向Trite Planiceps Simon蜘蛛滴加一滴咖啡因水或蒸馏水，然后在监视器上显示点刺激。我们测量了一般的“步行”或活动，作为控制身体疲劳和对刺激的光动力反应的控制。我们发现，与水相比，向蜘蛛注射咖啡因时，警惕性下降明显变浅（即蜘蛛对更长的时间有更大的反应）。此外，这些蜘蛛通常在整个测试期间都更加活跃，因此没有受到身体上的损害。我们的结果表明，至少在某些无脊椎动物中，CNS可能会引起警觉性下降。（PsycINFO数据库记录（c）2019 APA，保留所有权利）。这些蜘蛛通常在整个测试期间也更加活跃，因此没有受到身体上的损害。我们的结果表明，至少在某些无脊椎动物中，CNS可能会引起警觉性下降。（PsycINFO数据库记录（c）2019 APA，保留所有权利）。这些蜘蛛通常在整个测试期间也更加活跃，因此没有受到身体上的损害。我们的结果表明，至少在某些无脊椎动物中，CNS可能会引起警觉性下降。（PsycINFO数据库记录（c）2019 APA，保留所有权利）。