To keep on track during flight, fruitflies discount the skyward view
To keep on track during flight, fruitflies discount the skyward view
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为了在飞行过程中保持正轨，果蝇会降低天空视野
DOI：
10.1098/rsbl.2013.1103
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发表时间：
2014
期刊：
影响因子：
3.3
通讯作者：
J. Theobald
中科院分区：
文献类型：
--
作者：
C. Mazo;J. Theobald
当小飞虫偏离预定路线时，它们会利用眼睛的运动模式或光流来指导纠正方向。航向的变化产生独特的旋转运动模式，位置的变化产生平移运动模式，并且每个都在翼拍中产生校正响应。流场中的任何图像都可以表示旋转，但由于视差，只有附近物体的图像可以表示平移。因此，在地面附近飞行的昆虫可能对它们下方发生的平移光流反应更强烈，因为附近的地面会产生强光流。在这些实验中，严格拴在果蝇转向响应计算机生成的流场。当修正无意的旋转时，苍蝇在上下视野中对运动的权重相等。然而，当校正非预期的平移时，苍蝇在较低的视野中更强烈地加重运动。这些结果是一致的解释，果蝇稳定参加视觉领域可能包含最强的信号在自然飞行条件下。
When small flying insects go off their intended course, they use the resulting pattern of motion on their eye, or optic flow, to guide corrective steering. A change in heading generates a unique, rotational motion pattern and a change in position generates a translational motion pattern, and each produces corrective responses in the wingbeats. Any image in the flow field can signal rotation, but owing to parallax, only the images of nearby objects can signal translation. Insects that fly near the ground might therefore respond more strongly to translational optic flow that occurs beneath them, as the nearby ground will produce strong optic flow. In these experiments, rigidly tethered fruitflies steered in response to computer-generated flow fields. When correcting for unintended rotations, flies weight the motion in their upper and lower visual fields equally. However, when correcting for unintended translations, flies weight the motion in the lower visual fields more strongly. These results are consistent with the interpretation that fruitflies stabilize by attending to visual areas likely to contain the strongest signals during natural flight conditions.