Muñoz M, Gonzalez A
Departamento de Biología Celular, Facultad de Biología, Universidad Complutense, Madrid, Spain.
J Hirnforsch. 1990;31(3):341-8.
The trigeminal mesencephalic nucleus (Mes V) of the frog Rana ridibunda, has been studied by means of electron microscopic techniques. Mes V neurons are large (20-30 microns in diameter). They are dispersed in the optic tectum and show round to oval cell bodies. Both multipolar and unipolar cells were observed. Their cytoplasm is very rich in organelles with well-developed rough endoplasmic reticulum that forms prominent and scattered Nissl bodies. Numerous small mitochondria, Golgi dyctiosomes, neurotubules and neurofilaments are distributed among the granular endoplasmic reticulum. A striking feature is the existence of abundant lysosome-like particles throughout the cytoplasm. In the surface of Mes V neurons spinous processes are absent and synaptic contacts on the perikarya are scarce. Two types of synapses, one with spherical translucent vesicles and the other with elongated translucent vesicles, contact on either the cell body or the dendrites of Mes V cells.
已采用电子显微镜技术对泽蛙的三叉神经中脑核（Mes V）进行了研究。Mes V神经元较大（直径为20 - 30微米）。它们分散在视顶盖中，细胞体呈圆形至椭圆形。观察到了多极细胞和单极细胞。其细胞质富含细胞器，粗面内质网发达，形成明显且分散的尼氏体。众多小线粒体、高尔基体、神经微管和神经丝分布于颗粒内质网之间。一个显著特征是整个细胞质中存在大量类似溶酶体的颗粒。在Mes V神经元表面没有棘突，胞体上的突触联系稀少。两种类型的突触，一种含有球形透明小泡，另一种含有细长透明小泡，与Mes V细胞的胞体或树突相接触。
