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首页> 外文期刊>Current Biology: CB >Sun Navigation Requires Compass Neurons in ce:italic>Drosophila/ce:italic>
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Sun Navigation Requires Compass Neurons in ce:italic>Drosophila/ce:italic>

机译：太阳导航需要＆ com：斜视>果蝇＆ / ce：斜体>

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摘要

Despite their small brains, insects can navigate over long distances by orienting using visual landmarks [], skylight polarization [], and sun position []. AlthoughDrosophilaare not generally renowned for their navigational abilities, mark-and-recapture experiments in Death Valley revealed that they can fly nearly 15?km in a single evening []. To accomplish such feats on available energy reserves [], flies would have to maintain relatively straight headings, relying on celestial cues []. Cues such as sun position and polarized light are likely integrated throughout the sensory-motor pathway [], including the highly conserved central complex []. Recently, a group ofDrosophilacentral complex cells (E-PG neurons) have been shown to function as an internal compass [], similar to mammalian head-direction cells []. Using an array of genetic tools, we set out to test whether flies can navigate using the sun and to identify the role of E-PG cells in this behavior. Using a flight simulator, we found thatDrosophilaadopt arbitrary headings with respect to a simulated sun, thus performing menotaxis, and individuals remember their heading preference between successive flights—even over several hours. Imaging experiments performed on flying animals revealed that the E-PG cells track sun stimulus motion. When these neurons are silenced, flies no longer adopt and maintain arbitrary headings relative to the sun stimulus but instead exhibit frontal phototaxis. Thus, without the compass system, flies lose the ability to execute menotaxis and revert to a simpler, reflexive behavior.
机译：尽管他们的小脑小脑，但昆虫可以通过使用视觉地标[]，天窗极化[]和太阳位置[]定向，通过定向长途跋涉。虽然甜味酚可以普遍争夺他们的导航能力，死亡谷的标记和重新捕获实验显示，他们可以在一个晚上近15 km飞行[]。为了实现可用的能量储备上的这种壮举[]，苍蝇将不得不保持相对直的标题，依靠天线提示[]。诸如太阳位置和偏振光等提示可能整合在整个感官电机路线[]中，包括高度保守的中央综合体[]。最近，已经显示了一种乳糖醇类疗法综合细胞（E-PG神经元）作为内部罗盘[]，类似于哺乳动物头部方向细胞[]。使用一系列遗传工具，我们开始测试苍蝇是否可以使用太阳导航并识别E-PG细胞在这种行为中的作用。使用飞行模拟器，我们发现了关于模拟的太阳，从而表演了menotaxis的任意标题，并且个人在连续的航班之间记住他们的初始偏好 - 甚至在几个小时内。在飞行动物上进行的成像实验表明E-PG细胞跟踪太阳刺激运动。当这些神经元沉默时，苍蝇不再采用和维持相对于太阳刺激的任意标题，而是表现出正面光辐射。因此，没有指南针系统，苍蝇失去执行menotaxis的能力并恢复更简单，反射行为。

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