Morphological characteristics of dendrite bundles in the lumbar spinal cord of the rat
Morphological characteristics of dendrite bundles in the lumbar spinal cord of the rat
复制标题
大鼠腰脊髓树突束的形态特征
DOI：
10.1016/0006-8993(76)90398-x
复制
发表时间：
1976
期刊：
影响因子：
2.9
通讯作者：
E. Hinsman
中科院分区：
文献类型：
--
作者：
W. J. Anderson;M. Stromberg;E. Hinsman
在猫、猴和猪中发现运动神经元树突组织成小的紧密束，这表明应该在大鼠中进行这种现象的研究。用电镜、光镜和高尔基体法进行分析。在第六腰段脊髓中发现广泛的树突束组织。两个离散的束定位双侧：在腹外侧灰质的外侧束，和腹索的内侧束。侧束由纵向排列的树突、神经细胞、胶质细胞和毛细血管组成。在侧束中观察到多达1678个紧密排列的树突。内侧束包含的树突直接跨越中线，也纵向定向的树突。内侧树突束内的神经细胞呈单个或成簇分布，并有许多放射状树突束向外侧树突束突出。高尔基体分析证实，神经元的侧束有大部分的树突纵向取向。从背侧和内侧的神经元可以追踪到几个树突进入外侧束。电子显微镜证实了这一事实，即束组成的树突。它还揭示了许多dendrodendritic和dendrosomatic接触，桥粒的类型，以及大量的小的身份不明的过程。各种功能已归因于枝晶束进行了讨论。
The finding of motoneuron dendrites organized into small compact bundles in cats, monkeys and pigs suggested that a study of this phenomenon in rats should be undertaken. An analysis was performed with electron microscopy, light microscopy and Golgi methods. An extensive dendrite bundle organization was found in the sixth lumbar segment of the spinal cord. Two discrete bundles were localized bilaterally: a lateral bundle in the ventrolateral gray substance, and a medial bundle in the ventral funiculus. The lateral bundle was found to consist of longitudinally oriented dendrites, neurocytons, glial cells and capillaries. As many as 1678 closely packed dendrites were observed in the lateral bundle. The medial bundle contained dendrites directed across the midline and also longitudinally oriented dendrites. Neurocytons in the medial dendrite bundle were found singly or in clusters, and many radiating bundles of dendrites were observed projecting toward the lateral bundle. Golgi analysis confirmed that neurons in the lateral bundle had most of their dendrites oriented longitudinally. It was possible to trace several dendrites into the lateral bundle from dorsally and medially lying neurons. Electron microscopy substantiated the fact that the bundles were composed of dendrites. It also revealed numerous dendrodendritic and dendrosomatic contacts which were desmosomal in type as well as an abundance of small unidentified processes. Various functions which have been attributed to the dendrite bundles are discussed.