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首页> 美国卫生研究院文献>Frontiers in Behavioral Neuroscience >Visual motion-sensitive neurons in the bumblebee brain convey information about landmarks during a navigational task
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Visual motion-sensitive neurons in the bumblebee brain convey information about landmarks during a navigational task

机译：大黄蜂大脑中的视觉运动敏感神经元在导航任务期间传达有关地标的信息

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Bees use visual memories to find the spatial location of previously learnt food sites. Characteristic learning flights help acquiring these memories at newly discovered foraging locations where landmarks—salient objects in the vicinity of the goal location—can play an important role in guiding the animal's homing behavior. Although behavioral experiments have shown that bees can use a variety of visual cues to distinguish objects as landmarks, the question of how landmark features are encoded by the visual system is still open. Recently, it could be shown that motion cues are sufficient to allow bees localizing their goal using landmarks that can hardly be discriminated from the background texture. Here, we tested the hypothesis that motion sensitive neurons in the bee's visual pathway provide information about such landmarks during a learning flight and might, thus, play a role for goal localization. We tracked learning flights of free-flying bumblebees (Bombus terrestris) in an arena with distinct visual landmarks, reconstructed the visual input during these flights, and replayed ego-perspective movies to tethered bumblebees while recording the activity of direction-selective wide-field neurons in their optic lobe. By comparing neuronal responses during a typical learning flight and targeted modifications of landmark properties in this movie we demonstrate that these objects are indeed represented in the bee's visual motion pathway. We find that object-induced responses vary little with object texture, which is in agreement with behavioral evidence. These neurons thus convey information about landmark properties that are useful for view-based homing.
机译：蜜蜂利用视觉记忆来找到先前学习的食物场所的空间位置。特色学习飞行有助于在新发现的觅食位置获得这些记忆，在这些觅食位置，地标（目标位置附近的显着物体）可以在引导动物的归巢行为中发挥重要作用。尽管行为实验已经表明，蜜蜂可以使用各种视觉提示来区分对象作为界标，但视觉系统如何对界标特征进行编码的问题仍然存在。最近，可以证明运动提示足以允许蜜蜂使用很难与背景纹理区分开的界标来定位其目标。在这里，我们测试了一种假设，即蜜蜂的视觉通路中的运动敏感神经元在学习飞行期间会提供有关此类标志的信息，因此可能对目标定位起一定作用。我们在具有明显视觉界标的竞技场中跟踪了自由飞行的大黄蜂（Bombus terrestris）的学习飞行，在这些飞行中重建了视觉输入，并在束缚大黄蜂的过程中播放了自我透视电影，同时记录了方向选择性广域神经元的活动。在他们的视瓣中。通过比较典型的学习飞行过程中神经元的反应和该电影中地标属性的有针对性的修改，我们证明了这些对象确实在蜜蜂的视觉运动路径中得以体现。我们发现，对象诱导的响应随对象纹理的变化很小，这与行为证据一致。这些神经元因此传达了有关地标属性的信息，这些信息可用于基于视图的归位。

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