STRUCTURE CAUDATE NUCLEUS OF CAT - LIGHT AND ELECTRON MICROSCOPY
STRUCTURE CAUDATE NUCLEUS OF CAT - LIGHT AND ELECTRON MICROSCOPY
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DOI：
10.1098/rstb.1971.0102
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发表时间：
1971-01-01
影响因子：
6.3
通讯作者：
POWELL, TPS
中科院分区：
文献类型：
--
作者：
KEMP, JM;POWELL, TPS
猫的尾状核似乎是均匀的，当用光学或电子显微镜检查时，除了室管膜下面的一层，那里有高浓度的神经胶质细胞和少数神经元。在硫堇染色的脑切片中，尾状核内的神经细胞分为3个大小组：小于8 μm，9 ~ 18 μm，大于20 μm。用高尔基技术浸渍的材料的检查表明，有六种细胞类型（一种小细胞、四种中等细胞和一种大细胞），并且根据细胞胞体的大小及其树突的外观和排列可以区分这些细胞类型。一种具有许多树突棘的培养基细胞形成超过95%的细胞群体。大细胞和一种中等细胞类型被初步确定为细胞核传出纤维的来源。这些传出纤维和其余中等细胞类型的轴突具有侧支。已经确定了三组可能的传入纤维，这些和内在神经元的侧支形成了一个致密的神经丛，其单个纤维穿过树突而不是平行于树突。用电子显微镜也可以区分出六种细胞类型，其中四种可以直接与高尔基体浸渍材料中所见的细胞类型相关联。有几种树突，最常见的有许多刺。其他种类的树突棘较少，而静脉曲张的树突则没有棘。有许多细小的无髓鞘轴突。
The caudate nucleus of the cat appears to be homogeneous when examined with the light or electron microscope, except for a layer beneath the ependyma where there is a high concentration of glial cells and few neurons. In sections of brains stained with thionin the nerve cells in the caudate nucleus fall into three size groups: less than 8 μm, 9 to 18 μm, greater than 20 μm. Examination of material impregnated with the Golgi technique shows that there are six cell types (one small, four medium and one large), and these are distinguishable on the basis of the size of the cell somata and the appearance and arrangement of their dendrites. One type of medium cell with many dendritic spines forms over 95 % of the cell population. The large and one medium cell type are tentatively identified as the source of the efferent fibres of the nucleus. These efferent fibres and the axons of the remaining medium cell types have collateral branches. Three groups of possible afferent fibres have been identified, and these and the collateral branches of the intrinsic neurons form a dense plexus whose individual fibres cross dendrites rather than lie parallel to them. Six cell types may also be distinguished with the electron microscope, and four of these can be correlated directly with those seen in Golgi impregnated material. Several kinds of dendrites are present, the commonest having numerous spines. Fewer spines are present on other varieties of dendrite, and those dendrites which are varicose have no spines. Numerous fine, nonmyelinated axons are present.