Two visual systems in one brain: neuropils serving the principal eyes of the spider Cupiennius salei.
Two visual systems in one brain: neuropils serving the principal eyes of the spider Cupiennius salei.
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一个大脑中有两个视觉系统：神经细胞服务于蜘蛛 Cupiennius salei 的主眼。
DOI：
10.1002/cne.903280105
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Barth,FG
中科院分区：
文献类型：
--
作者：
Strausfeld,NJ;Weltzien,P;Barth,FG
流浪蜘蛛Cupiennius的主要（前正中）眼睛是由三个连续的神经柱，其组织是不同于那些服务于次要眼睛。光感受器终止于具有重叠树突场的二级神经元之间的第一视神经元。第二级神经元终止于前正中眼骨髓的不同深度，在那里它们被第三级投射神经元的灌木状树枝树访问。这些供应管道延伸到“中心体”。这个新月形的神经节位于大脑后部靠近背表面的中矢状面。它被组织成柱状，并向其他脑中心提供柱状和切向传出神经。“中央体”神经元的供应和组织使人想起供应昆虫小叶的视网膜定位神经末梢。通往“中心体”的通道包括两个并行的视觉通道之一，另一个由供应“蘑菇体”的副眼提供。我们认为，主要的眼睛通路可能参与形式和纹理的感知，而次要的眼睛检测运动，是已知的跳蜘蛛。我们的数据并不支持Hanström的经典观点，即“中心体”与蛛网的形成特别相关，也不支持它与昆虫大脑中的同名物同源。
Principal (anterior median) eyes of the wandering spider Cupiennius are served by three successive neuropils, the organization of which is distinct from those serving secondary eyes. Photoreceptors terminate in the first optic neuropil amongst second order neurons with overlapping dendritic fields. Second order neurons terminate at various depths in anterior median eye medulla where they are visited by bush-like dendritic trees of third order projection neurons. These supply tracts which extend into the “central body.” This crescent-shaped neuropil lies midsagittally in the rear of the brain near its dorsal surface. It is organized into columns and it supplies both columnar and tangential efferents to other brain centers. The supply to and organization of the “central body” neuropil is reminiscent of retinotopic neuropils supplying the lobula of insects. Channels to the “central body” comprise one of two concurrent visual pathways, the other provided by the secondary eyes supplying the “mushroom body.” We suggest that principal eye pathways may be involved in form and texture perception whereas secondary eyes detect motion, as is known for jumping spiders. Our data do not support Hanström's classical view that the “central body” is specifically associated with web-building, nor that it is homologous to its namesake in insect brains.© 1993 Wiley-Liss, Inc.