为啥一到冬天起床就特别困难？真不是因为懒
Have a hard time waking up when it’s cold out? Scientists say blame your brain

Their study on fruit flies, has found a thermometer circuit can transfer information about cold temps from their antennas right to the brain.他们在对果蝇的研究中发现了一个温度提示回路，可以将低温信息从触角传输到大脑。

“This helps explains why -- for both flies and humans -- it is so hard to wake up in the morning in winter,” said Marco Gallio, associate professor of neurobiology in the Weinberg College of Arts and Sciences. “By studying behaviors in a fruit fly, we can better understand how and why temperature is so critical to regulating sleep.” 温伯格文理学院神经生物学副教授马可·加利奥表示：“这有助于解释为什么无论对苍蝇还是人类来说，在冬天的早上醒来都很困难。通过研究果蝇的行为，我们可以更好地理解温度对调节睡眠的重要性。”

The paper describes for the first time “absolute cold” receptors residing in the fly antenna, which respond to temperature only below the fly’s “comfort zone” of approximately 77 degrees Fahrenheit. 这篇论文首次介绍了果蝇触角中的“绝对寒冷”感觉神经元，它们只对低于果蝇温度舒适区的气温作出反应。果蝇感到适宜的温度接近25摄氏度。

“Temperature sensing is one of the most fundamental sensory modalities,” said Gallio, whose group is one of only a few in the world that is systematically studying temperature sensing in fruit flies. “The principles we are finding in the fly brain -- the logic and organization -- may be the same all the way to humans. Whether fly or human, the sensory systems have to solve the same problems, so they often do it in the same ways.”加里奥的研究团队是世界上为数不多的系统研究果蝇温度感应的团队之一，他表示：“温度感应是最基本的感觉方式之一。我们在果蝇大脑中发现的原理——逻辑和组织结构——可能对人类来说都是一样的。无论苍蝇还是人类，感觉系统都必须处理同样的问题，因此它们的处理机制通常也是相似的。”