The Organization of the lamina ganglionaris of the prawn, Pandalus borealis (Kröyer)
The Organization of the lamina ganglionaris of the prawn, Pandalus borealis (Kröyer)
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对虾 (Pandalus borealis) (Kröyer) 神经节板的组织
DOI：
10.1007/bf00218491
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发表时间：
1975
影响因子：
3.6
通讯作者：
D. Nässel
中科院分区：
文献类型：
--
作者：
D. Nässel
摘要十足目甲壳动物Pandalus borealis的神经节层（第一视神经桩）具有水平排列的视神经盒（突触室）。每个视盒含有7个感受器轴突终末和5个单极二级神经元的分支轴纤维。它们的细胞体排列成两层。内层仅包含这些类型之一的细胞体，并且每个盒被该神经元类型的两个神经元侵入（类型M 1：a和M 1：B）。外层包含其余三种类型（M2，M3和M4）的细胞体。一种是在药筒的中心产生大的径向分支轴纤维。另外两个分支较宽，可形成钉仓间接触，一个近端，另一个远端位于丛状层中，明显为双层。感受器轴突终止于相应的两个层次，两组切向纤维在板层的近端和中部形成网络。这两种网络都具有在垂直平面中具有初级分支和在水平面中具有次级分支的纤维。神经网络的纤维来源于从第二视神经丛（外髓质）发出的轴突。
SummaryThe Lamina ganglionaris (first optic neuropile) of the decapod crustacean Pandalus borealis has its optic cartridges (synaptic compartments) arranged in horizontal rows. Each optic cartridge contains seven receptor axon terminals and the branching axis fibres of five monopolar second order neurons.Four types of monopolar neurons are classified. Their cell bodies are arranged in two layers. The inner layer contains the cell bodies of exclusively one of these types, and each cartridge is invaded by two neurons of this neuron type (type M 1: a and M 1: b). The outer layer contains the cell bodies of the remaining three types (M 2, M 3 and M 4). One gives rise to a large radially branched axis fibre in the centre of the cartridge. The other two have wide branches which may make inter-cartridge contacts, one proximally and the other distally in the plexiform layer, which is clearly bistratified. The receptor axons terminate in two levels corresponding to these strata.Two sets of tangential fibres form networks in the proximal and the mid-portion of the lamina. Both networks have fibres with primary branches in the vertical plane and secondary branches in the horizontal plane. The fibres of the networks are derived from axons that pass from the second optic neuropile, the medulla externa.