Neurons of the median neuroblast lineage of the grasshopper: a population study of the efferent DUM neurons.
Neurons of the median neuroblast lineage of the grasshopper: a population study of the efferent DUM neurons.
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蚱蜢中位神经母细胞谱系的神经元：传出 DUM 神经元的群体研究。
DOI：
10.1002/cne.903580407
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Siegler,MV
中科院分区：
文献类型：
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作者：
Campbell,HR;Thompson,KJ;Siegler,MV
对一组直系相关的蚱蜢神经元进行了研究，以确定该组传出神经元的数量及其形态类型。这些神经元起源于第三胸神经细胞的正中神经母细胞，构成了通常所说的DUM或背侧未配对正中组。在该组约92个神经元中，约20个是传出神经元，其余的是局部或节段间的中间神经元。作为我们继续发展研究的一部分，我们希望确定谱系中的传出神经元并确定它们的数量。在早期的研究中描述了10个传出DUM神经元，其中神经元通过微电极单独染色。剩下的未识别的神经元可能是新的类型，已知类型的倍数，或者两者兼而有之，通过进一步的神经元染色不容易区分的可能性。相反，我们使用逆行染色和轴突示踪的方法，使我们能够检查整个组的传出DUM神经元。共鉴定出19个传出神经元，包括2个DUM1s， 5个DUM3s， 6个DUM3、4s， 3个DUM3、4、5s和3个DUM5s，神经元根据其轴突所在的侧神经命名。根据外侧神经轴突分支的分布、DUM束深浅内初级神经突的走向、细胞体的直径进一步划分出输出神经元的类型。©1995 Wiley‐Liss, Inc。
A group of lineally related neurons in the grasshopper was studied to determine the number of efferent neurons in the group and their morphological types. The neurons arise from the median neuroblast of the third thoracic neuromere and comprise what is commonly known as the DUM or dorsal unpaired median group. Of some 92 neurons in the group, about 20 are efferent neurons, the remainder being local or intersegmental interneurons. As part of our continuing developmental studies, we wished to identify the efferent neurons within the lineage and to determine their number. Ten efferent DUM neurons had been described in earlier studies, where neurons were stained individually through microelectrodes. The remaining unidentified neurons might be novel types, multiples of known types, or both, possibilities that would not be readily distinguished through further staining of neurons individually. Rather, we used methods of retrograde staining and axon tracing that allowed us to examine the entire group of efferent DUM neurons. Nineteen efferent neurons were identified, comprising two DUM1s, five DUM3s, six DUM3,4s, three DUM3,4,5s, and three DUM5s, neurons were named according to the lateral nerves containing their axons. The efferent neurons were further divided by type according to the distribution of axonal branches in lateral nerves, the course of the primary neurite within the deep or superficial DUM tract, and the diameter of the cell body. © 1995 Wiley‐Liss, Inc.