ANATOMY OF THE INFERIOR COLLICULUS IN RAT
ANATOMY OF THE INFERIOR COLLICULUS IN RAT
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DOI：
10.1007/bf00319050
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发表时间：
1985-01-01
期刊：
影响因子：
--
通讯作者：
OSEN, KK
中科院分区：
文献类型：
--
作者：
FAYELUND, H;OSEN, KK
本文定义了大鼠下丘的细分模式。它是基于用高尔基法在白化鼠和戴帽鼠的额、矢状面和水平面上切下的一系列大脑切片。Nissl和联合细胞-髓磷脂方法。与其他哺乳动物一样，大鼠的下丘由一个中央核、一个外皮层和一个背皮层组成。中央核在额平面扁平，并局限于下丘的尾侧。它的特点是由盘状神经元组成的片层组织，其间散布着多极细胞。这些细胞是小型到中型的。虽然细胞核内细胞的大小和堆积密度存在背腹侧梯度，但总体大小比邻近的细分区域小，堆积密度大。这两个皮层各由3层组成。最外层与两个皮质共同，形成沿下丘大部分周长连续的纤维细胞囊。外皮层位于中央核的外侧、吻侧、腹侧和腹尾侧。它的第二层，深至浅表被膜，特点是在髓磷脂密集的神经层中有许多小的和几个中等大小的神经元簇。第3层是细分的主要部分，由相对分散的小、中、大细胞组成，最具特征的元素是具有粗尼索尔颗粒的大型多极神经元。背侧皮层位于中央核的背侧和背内侧。它的第二层由小神经元组成，而第三层深层还包含中等大小的神经元。细胞密度介于中央核和外皮层深层之间。试图通过参考易于识别的附近结构和标准立体坐标来促进分块。
This paper defines the pattern of subdivision of the inferior colliculus in rat. It is based on serial sections of brains of albino and hooded rats cut in the frontal, sagittal and horizontal planes using Golgi. Nissl and a combined cell-myelin method. In rat, like in other mammals, the inferior colliculus consists of a central nucleus, an external cortex and a dorsal cortex. The central nucleus is flattened in the frontal plane and confined to the caudomedial part of the inferior colliculus. It is characterized by a lamellar organization of disc-shaped neurons interspersed with multipolar cells. The cells are small to medium-sized. Although there is a dorsoventral gradient in size and packing density of cells within the nucleus, the overall size is smaller and the packing density larger than in adjacent subdivisions. The 2 cortices each consists of 3 layers. The outermost layer is common to the 2 cortices, forming a fibrocellular capsule continuous along most of the circumference of the inferior colliculus. The external cortex is located lateral, rostral, ventral and ventrocaudal to the central nucleus. Its 2nd layer, deep to the superficial capsule, is characterized by clusters of many small and a few medium-sized neurons in a myelin-dense neuropil. Layer 3, which constitutes the major portion of the subdivision, consists of relatively scattered, small, medium and large cells, the most characteristic element being large multipolar neurons with coarse Nissl granules. The dorsal cortex is located dorsocaudal and dorsomedial to the central nucleus. Its 2nd layer is composed of small neurons, while the 3rd, deep layer in addition contains medium-sized neurons. The cell density is intermediate to that of the central nucleus and the deep part of the external cortex. An attempt was made to facilitate the parcellation by reference to easily recognizable, nearby structures and to standard stereotaxic coordinates.