The neural mechanisms of antennal positioning in flying moths
The neural mechanisms of antennal positioning in flying moths
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DOI：
10.1242/jeb.071704
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发表时间：
2012-09-01
影响因子：
2.8
通讯作者：
Sane, Sanjay P.
中科院分区：
文献类型：
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作者：
Krishnan, Anand;Prabhakar, Sunil;Sane, Sanjay P.
在多种昆虫中，天线的前向定位通常是飞行开始的第一个行为指标之一。这种行为对于飞行期间天线正确获取机械感觉和嗅觉输入可能很重要。在这里，我们从行为、神经解剖学和神经生理学的角度描述了天蛾触角定位的神经机制。行为实验表明，一组称为博姆刚毛（或发板）的感觉刚毛在飞行过程中调节触角的定位。当这些感觉结构从触角的基部被切除时，飞蛾无法将触角置于飞行位置，导致与扑动的翅膀频繁碰撞。底层感觉和运动神经元的荧光染料填充显示，机械感觉刚毛神经元的轴突乔木与触角运动神经元的树突乔木在空间上重叠。此外，刺激感觉刚毛后触角肌肉激活之间的潜伏期也很短（
In diverse insects, the forward positioning of the antenna is often among the first behavioral indicators of the onset of flight. This behavior may be important for the proper acquisition of the mechanosensory and olfactory inputs by the antennae during flight. Here, we describe the neural mechanisms of antennal positioning in hawk moths from behavioral, neuroanatomical and neurophysiological perspectives. The behavioral experiments indicated that a set of sensory bristles called Bohm's bristles (or hair plates) mediate antennal positioning during flight. When these sensory structures were ablated from the basal segments of their antennae, moths were unable to bring their antennae into flight position, causing frequent collisions with the flapping wing. Fluorescent dye-fills of the underlying sensory and motor neurons revealed that the axonal arbors of the mechanosensory bristle neurons spatially overlapped with the dendritic arbors of the antennal motor neurons. Moreover, the latency between the activation of antennal muscles following stimulation of sensory bristles was also very short (