The diencephalon of the channel catfish, Ictalurus punctatus. II. Retinal, tectal, cerebellar and telencephalic connections.
The diencephalon of the channel catfish, Ictalurus punctatus. II. Retinal, tectal, cerebellar and telencephalic connections.
复制标题
斑点叉尾鮰的间脑。
DOI：
10.1159/000115319
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Striedter,GF
中科院分区：
文献类型：
--
作者：
Striedter,GF
在一篇配套论文中，描述了癍点叉尾鱼间脑的核组织，并与其他硬骨鱼进行了比较。本文描述了间脑与视网膜、视顶盖、小脑体和端脑的联系。所用的主要示踪剂是吲哚羰花青染料DiI，其在固定的组织中沿沿着神经元膜扩散。几乎所有在同伴研究中被认为是不同的细胞核也被发现表现出不同的连接。大多数这些连接以前没有在鲶鱼或其他硬骨鱼类中描述过。结合现有文献中的连接数据，本研究的结果允许人们认识到大量的不同途径，通过间脑的通道鲶鱼，包括几个视觉，听觉，味觉，电和机械感觉通路的端脑。几乎所有的物种差异间脑组织中指出的同伴研究可以解释的变化，在一个主要的感觉通路。与此相反，间脑的多模态和整合区似乎相对保守。硬骨鱼类间脑与其他脊椎动物间脑的比较表明，背侧丘脑、腹侧丘脑和后结节至少部分地分别与哺乳动物的背侧丘脑、齿状核和丘脑底核同源。在哺乳动物和硬骨鱼类中，这三个区域都投射到端脑。然而，在大多数脊椎动物中，背侧丘脑为端脑提供了主要的输入，而在硬骨鱼类中，端脑的主要输入来自后结节。
In a companion paper, the nuclear organization of the diencephalon of the channel catfish,Ictalurus punctatus,was described and compared to that of other teleosts. The present paper describes the connections of the diencephalon with the retina, optic tectum, corpus of the cerebellum and telencephalon. The principal tracer employed is the indocarbocyanine dye DiI which diffuses along neuronal membranes in fixed tissues. Almost all of the nuclei that were recognized as distinct in the companion study are found to also exhibit distinct sets of connections. Most of these connections have not been described previously in catfishes or other teleosts. When combined with connectional data from the existing literature, the results of the present study allow one to recognize a great number of distinct pathways through the diencephalon of channel catfish, including several visual, auditory, gustatory, electrosensory and mechanosensory pathways to the telencephalon. Almost all of the species differences in diencephalic organization noted in the companion study can be accounted for by changes in one of the major sensory pathways. In contrast, the multimodal and integrative areas of the diencephalon appear to be relatively conservative. A comparison between the diencephalon of teleosts and that of other vertebrates suggests that the dorsal thalamus, the ventral thalamus and the posterior tuberculum are homologous, at least in part, to the dorsal thalamus, the zona incerta and the subthalamic nucleus of mammals, respectively. All three areas project to the telencephalon in both mammals and teleosts. In most vertebrates, however, the dorsal thalamus provides the dominant input to the telencephalon, whereas in teleosts the main telencephalic input derives instead from the posterior tuberculum.