A neural heading estimate is compared with an internal goal to guide oriented navigation.

A neural heading estimate is compared with an internal goal to guide oriented navigation.
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DOI:
10.1038/s41593-019-0444-x
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发表时间:
2019-09
影响因子:
25
通讯作者:
Maimon G
Maimon G
中科院分区:
医学1区
文献类型:
--
作者:
Green J;Vijayan V;Mussells Pires P;Adachi A;Maimon G

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目标导向导航被认为依赖于头部方向细胞的活动,但这种活动如何指导即时行动仍然知之甚少。在这里,我们的特点是如何在果蝇中央复合体的标题神经元指导时刻到时刻的行动。我们建立了一个先天的,头部神经元依赖,系留导航行为,步行苍蝇保持一个直线轨迹沿着一个特定的角度轴承数百个身体长度。当苍蝇执行这项任务时,我们使用化学遗传学来瞬时旋转它们的神经航向估计,并观察到苍蝇放慢速度并转向一个方向,该方向旨在将航向估计返回到刺激前所占据的角度。这些结果支持了一个工作模型,在该模型中,苍蝇大脑定量地比较当前航向的内部估计与内部目标航向,并使用差异的符号和幅度来确定转向的方式,转向的难度以及向前走的速度。
Goal-directed navigation is thought to rely on the activity of head-direction cells, but how this activity guides moment-to-moment action remains poorly understood. Here we characterize how heading neurons in the Drosophila central complex guide moment-to-moment actions. We establish an innate, heading-neuron dependent, tethered navigational behavior where walking flies maintain a straight trajectory along a specific angular bearing for hundreds of body lengths. While flies perform this task, we use chemogenetics to transiently rotate their neural heading estimate and observe that the flies slow down and turn in a direction that aims to return the heading estimate to the angle it occupied prior to stimulation. These results support a working model in which the fly brain quantitatively compares an internal estimate of current heading with an internal goal heading and uses the sign and magnitude of the difference to determine which way to turn, how hard to turn, and how fast to walk forward.
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