Dynamic properties of large-field and small-field optomotor flight responses in Drosophila
Dynamic properties of large-field and small-field optomotor flight responses in Drosophila
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DOI：
10.1007/s00359-007-0233-y
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发表时间：
2007-07-01
影响因子：
2.1
通讯作者：
Frye, Mark A.
中科院分区：
文献类型：
--
作者：
Duistermars, Brian J.;Reiser, Michael B.;Frye, Mark A.
在家蝇Optomotor飞行控制显示带宽分馏，使转向响应振荡大视场旋转全景峰值在低频率，而响应小视场对象峰值在高频率。在果蝇中，稳态大磁场平移产生的转向响应是大磁场旋转的三倍。在这里，我们研究的optomotor转向反应动态振荡的视觉刺激组成的大视场旋转，大视场扩展，和小视场运动。结果表明，在较大的苍蝇，大领域optomotor转向响应峰值在低频，而小领域的响应持续在高频条件下。然而，在果蝇大领域的扩展elephant更高的幅度和更严格的相位锁定optomotor的反应比旋转整个频谱，这可能表明进一步隔离内的大领域的途径。对翅膀拍打频率和振幅的分析表明，飞行过程中的机械功率输出根据视觉场景的空间组织和运动动力学而变化。这些结果表明，在较大的苍蝇一样，optomotor控制系统被组织成平行的大字段和小字段的路径，并扩展了以前的分析，以量化扩展灵敏度转向反射和飞行功率输出的频谱。
Optomotor flight control in houseflies shows bandwidth fractionation such that steering responses to an oscillating large-field rotating panorama peak at low frequency, whereas responses to small-field objects peak at high frequency. In fruit flies, steady-state large-field translation generates steering responses that are three times larger than large-field rotation. Here, we examine the optomotor steering reactions to dynamically oscillating visual stimuli consisting of large-field rotation, large-field expansion, and small-field motion. The results show that, like in larger flies, large-field optomotor steering responses peak at low frequency, whereas small-field responses persist under high frequency conditions. However, in fruit flies large-field expansion elicits higher magnitude and tighter phase-locked optomotor responses than rotation throughout the frequency spectrum, which may suggest a further segregation within the large-field pathway. An analysis of wing beat frequency and amplitude reveals that mechanical power output during flight varies according to the spatial organization and motion dynamics of the visual scene. These results suggest that, like in larger flies, the optomotor control system is organized into parallel large-field and small-field pathways, and extends previous analyses to quantify expansion-sensitivity for steering reflexes and flight power output across the frequency spectrum.