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Development of Concurrent Retinotopic Maps in the Fly Motion Detection Circuit.
Cell ( IF 45.5 ) Pub Date : 2018-03-22 , DOI: 10.1016/j.cell.2018.02.053
Filipe Pinto-Teixeira 1 , Clara Koo 2 , Anthony Michael Rossi 2 , Nathalie Neriec 3 , Claire Bertet 2 , Xin Li 2 , Alberto Del-Valle-Rodriguez 3 , Claude Desplan 1
Affiliation  

Understanding how complex brain wiring is produced during development is a daunting challenge. In Drosophila, information from 800 retinal ommatidia is processed in distinct brain neuropiles, each subdivided into 800 matching retinotopic columns. The lobula plate comprises four T4 and four T5 neuronal subtypes. T4 neurons respond to bright edge motion, whereas T5 neurons respond to dark edge motion. Each is tuned to motion in one of the four cardinal directions, effectively establishing eight concurrent retinotopic maps to support wide-field motion. We discovered a mode of neurogenesis where two sequential Notch-dependent divisions of either a horizontal or a vertical progenitor produce matching sets of two T4 and two T5 neurons retinotopically coincident with pairwise opposite direction selectivity. We show that retinotopy is an emergent characteristic of this neurogenic program and derives directly from neuronal birth order. Our work illustrates how simple developmental rules can implement complex neural organization.

中文翻译:


飞行运动检测电路中并发视网膜主题图的开发。



了解发育过程中复杂的大脑线路是如何产生的是一项艰巨的挑战。在果蝇中,来自 800 个视网膜小眼的信息在不同的大脑神经桩中进行处理,每个神经桩又细分为 800 个匹配的视网膜专题列。小叶板包含四种 T4 和四种 T5 神经元亚型。 T4 神经元对亮边缘运动做出反应,而 T5 神经元对暗边缘运动做出反应。每个都调整为四个基本方向之一的运动,有效地建立八个并发视网膜专题图以支持宽视野运动。我们发现了一种神经发生模式,其中水平或垂直祖细胞的两个连续的Notch依赖性分裂产生两个T4和两个T5神经元的匹配组,其视网膜局部与成对相反方向选择性一致。我们证明视网膜病变是这种神经源性程序的一个新兴特征,并且直接源自神经元的出生顺序。我们的工作说明了简单的发育规则如何实现复杂的神经组织。
更新日期:2018-03-22
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