Bumblebees measure optic flow for position and speed control flexibly within the frontal visual field
Bumblebees measure optic flow for position and speed control flexibly within the frontal visual field
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DOI：
10.1242/jeb.107409
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发表时间：
2015-04-01
影响因子：
2.8
通讯作者：
Baird, Emily
中科院分区：
文献类型：
--
作者：
Linander, Nellie;Dacke, Marie;Baird, Emily
当飞行穿过狭窄的空间时，昆虫通过平衡每只眼睛所经历的表观图像运动(光流)的大小和通过将该值保持在所需的设置点附近来控制它们的位置。此前，已有研究表明，当大黄蜂遇到邻近表面的突然变化时--如视野两侧光流大小的变化所示--它们在变化之前就调整了飞行速度，这表明它们在正面视野的低视角下测量光流以控制速度。在这里，我们研究了平移光流大小的突然变化对熊蜂的位置和速度控制的影响，如果这些变化是不对称的；也就是说，如果它们只发生在视野的一侧。我们的结果表明，大黄蜂对用于飞行控制的光流提示做出反应的视觉区域不受设定视角的支配。相反，大黄蜂似乎使用了额叶视野中经历的最大幅度的平移光流。这一策略确保大黄蜂使用最近的障碍物--也就是它们最有可能发生碰撞的障碍物--产生的平移光流来控制飞行。
When flying through narrow spaces, insects control their position by balancing the magnitude of apparent image motion (optic flow) experienced in each eye and their speed by holding this value about a desired set point. Previously, it has been shown that when bumblebees encounter sudden changes in the proximity to nearby surfaces - as indicated by a change in the magnitude of optic flow on each side of the visual field - they adjust their flight speedwell before the change, suggesting that they measure optic flow for speed control at low visual angles in the frontal visual field. Here, we investigated the effect that sudden changes in the magnitude of translational optic flow have on both position and speed control in bumblebees if these changes are asymmetrical; that is, if they occur only on one side of the visual field. Our results reveal that the visual region over which bumblebees respond to optic flow cues for flight control is not dictated by a set viewing angle. Instead, bumblebees appear to use the maximum magnitude of translational optic flow experienced in the frontal visual field. This strategy ensures that bumblebees use the translational optic flow generated by the nearest obstacles - that is, those with which they have the highest risk of colliding - to control flight.