Organization of optic lobes that support motion detection in a semiterrestrial crab.
Organization of optic lobes that support motion detection in a semiterrestrial crab.
复制标题
支持半陆生蟹运动检测的视叶组织。
DOI：
10.1002/cne.20755
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Tomsic,Daniel
中科院分区：
文献类型：
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作者：
Sztarker,Julieta;Strausfeld,NicholasJ;Tomsic,Daniel
十足类动物(软甲纲、甲壳纲)的视觉引导行为和视觉生理学的记录与其视觉系统的神经结构知识之间存在不匹配的情况。本研究描述了中华绒螯蟹四个视觉神经鞘的神经解剖学特征，该模型目前被用作研究学习和记忆的神经生物学。沙眼的视觉记忆被认为是由大视野运动敏感神经元从视网膜深部神经桩内部驱动的。在这里，我们描述了以丘脑大叶为特征的神经结构，在其中发现了这样的神经元。结果表明，与昆虫等效区不同的是，软骨板小叶上密密麻麻地排列着柱状结构，柱状结构的间距与视网膜层的视网膜层单位的间距相同。小叶由多个层次的层和柱状传入神经组成，这些传入神经供应切线神经元系统。其中两个已知对穿过视网膜的运动做出反应，它们在小叶深处垂直排列树突区域。它们还显示了染料偶联的证据。我们讨论了关于椎板和髓质组织的跨分类单元的共性的重要性，并将这些与支持匹配过滤器系统的深层神经毛的可能的分类单元特定的安排进行了对比。J.Comp.神经。493：396-411,2005。©2005 Wiley-Liss Inc.
There is a mismatch between the documentation of the visually guided behaviors and visual physiology of decapods (Malacostraca, Crustacea) and knowledge about the neural architecture of their visual systems. The present study provides a description of the neuroanatomical features of the four visual neuropils of the grapsid crabChasmagnathus granulatus, which is currently used as a model for investigating the neurobiology of learning and memory. Visual memory inChasmagnathusis thought to be driven from within deep retinotopic neuropil by large‐field motion‐sensitive neurons. Here we describe the neural architecture characterizing theChasmagnathuslobula, in which such neurons are found. It is shown that, unlike the equivalent region of insects, the malacostracan lobula is densely packed with columns, the spacing of which is the same as that of retinotopic units of the lamina. The lobula comprises many levels of strata and columnar afferents that supply systems of tangential neurons. Two of these, which are known to respond to movement across the retina, have orthogonally arranged dendritic fields deep in the lobula. They also show evidence of dye coupling. We discuss the significance of commonalties across taxa with respect to the organization of the lamina and medulla and contrasts these with possible taxon‐specific arrangements of deeper neuropils that support systems of matched filters. J. Comp. Neurol. 493:396–411, 2005. © 2005 Wiley‐Liss, Inc.