NEURON TYPES IN THE CENTRAL NUCLEUS OF THE INFERIOR COLLICULUS THAT PROJECT TO THE MEDIAL GENICULATE-BODY
NEURON TYPES IN THE CENTRAL NUCLEUS OF THE INFERIOR COLLICULUS THAT PROJECT TO THE MEDIAL GENICULATE-BODY
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DOI：
10.1016/0306-4522(84)90033-2
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发表时间：
1984-01-01
期刊：
影响因子：
3.3
通讯作者：
OLIVER, DL
中科院分区：
文献类型：
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作者：
OLIVER, DL
将辣根过氧化物酶注射到猫的内侧膝状体后，至少有 4 种神经元类型（根据树突和细胞体形态进行区分）在下丘的中央核中被标记。大多数标记细胞具有盘状树突状区域，其方向和分层排列是重要的识别特征。大多数标记细胞是小型或中型盘状细胞，具有相应大小的树突区和细胞体。这些细胞类型似乎具有分散的尼氏物质和罕见的轴体末端。大的盘状细胞（通过其大的树突区域和体细胞来识别）也被标记。这些可能具有不同的尼氏模式，包括核周池和颗粒内质网团块以及许多轴体突触末端。星状细胞构成了 4 种标记的细胞类型，其特征在于其球形树突域，该树突域由向各个方向辐射的树突组成，特别是跨越由盘状细胞形成的层。星状细胞可能对应于具有颗粒状内质网堆叠或团块、不规则核膜、频繁的轴体接触的神经元。显然，之前使用高尔基体方法进行的研究中发现的许多细胞类型都将轴突发送到内侧膝状体。结果还提出了尼氏模式和中央核细胞类型的树突形态相关的可能性。中央核中存在几种类型的神经元，轴突上升至丘脑，可能为中枢听觉系统这部分的某种类型的并行信息处理提供结构基础。
At least 4 neuron types, distinguished on the basis of dendritic and cell body morphology, were labeled in the central nucleus of the inferior colliculus after horseradish peroxidase injections into the medial geniculate body of the cat. Most labeled cells had disc-shaped dendritic fields whose orientation and arrangement into layers were important identifying features. Most labeled cells were small or medium-sized disc-shaped cells with dendritic fields and cell bodies of corresponding size. These cell types appeared to have dispersed Nissl substance and infrequent axosomatic endings. Large disc-shaped cells, identified by their large dendritic fields and somata, were also labeled. These may have had a different Nissl pattern, including both perinuclear cisterns and clumps of granular endoplasmic reticulum and numerous axosomatic synaptic endings. Stellate cells, which constituted the 4 labeled cell type, were distinguished by their spherical dendritic fields composed of dendrites radiating in all directions, especially across the layers formed by the disc-shaped cells. Stellate cells probably corresponded to neurons with stacks or clumps of granular endoplasmic reticulum, an irregular nuclear envelope, the frequent axosomatic contacts. Evidently, many of the cell types previously identified in studies using the Golgi method send their axons to the medial geniculate body. The results also raise the possibility that Nissl pattern and dendritic morphology of central nucleus cell types are related. The presence of several types of neurons in the central nucleus with axons ascending to the thalamus may provide a structural basis for some type of parallel information processing in this part of the central auditory system.