【摘要】 本文用扫描和透射电镜证实在成年大白鼠的第三脑室存在室管膜上神经元样细胞、神经胶质细胞和类组织细胞。神经纤维发自神经元样细胞或自脑室外穿入室腔而来,其末梢内含有清亮囊泡或兼有大颗粒囊泡。室腔內尚有膨大的树突末梢和室管膜细胞的球状小体。上述各种结构与感受、分泌和调节功能有关,并为下丘脑控制垂体机能的另一新途径(经脑脊液和室管膜)提供了形态学依据。更多还原

【Abstract】 The supraependymal neuron-like cells, neuroglia-like cells and Mstocyte-like cells have been identified in the third cerebral ventricle of adult albino rats by scanning and transmission electron microscopy. The neuron-like cells are multipolar or bipolar in shape with smooth surface and remarkable axon, situating in the cilia-less or noncilia area of the lateral wall and floor of the third ventricle. The neuroglia-like cells and histocyte-like cells are numerous, situating in the cilia area of the lateral wall of the third ventricle. The former are polygonal in shape with short and thick processes, showing no polarity; the latter are spheric with microvilli and vesicle-like structures on the surface. The nerve fibers come from, the supraependymal neuron-like cells or the neurons outside the ventricle. They travel parallel to the surface of the ventricular wall alone or interweave with others. Their terminals, whJich closely contact the cytoplasmic membrane of the ependymal cells, contain small clear vesicles or mixed small clear and large granular vesicles. The CSF-contacting dendritic terminals situating on the lateral wall of the third ventricle show spheric enlargement with ruffled surface. Many smooth spheric bodies of the ependymal cells distribute sparsely on the floor of the third ventricle. The ultrastructural study suggests that different kinds of supraependymal structures may be related to receptive, secretory and regulatory function, especially, serve as a morphological basis for the new control pathway, i.e., CSP and ependyma, through which the hypothalamus regulates the activity of the anterior lobe of the pituitary gland.更多还原