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目的 研究大鼠脑脊髓室管膜上皮细胞的区域性结构特征 ,并初步探讨其功能。 方法 采用扫描电子显微镜观察法。 结果 侧脑室壁室管膜上皮细胞游离端呈不规则多边形 ,可见纤毛及微绒毛 ,偶见分泌泡。侧脑室脉络丛上皮细胞游离端呈不规则多角形、梭形或三角形 ,微绒毛、分泌泡丰富 ,纤毛少见 ,可见“丛上细胞”。第Ⅲ脑室室管膜上皮细胞具明显区域性 ,脑室底部上皮细胞微绒毛短小、散在 ,有少量分泌粒 ,无纤毛 ;侧壁分泌泡较多 ,纤毛丰富 ;均可见“丛上细胞”。第Ⅲ脑室脉络丛上皮细胞可见大量细长微绒毛 ,分泌泡及“丛上细胞”较少。室间孔室管膜上皮呈梭形 ,长轴与室间孔平行 ,游离面罕见微绒毛 ,“丛上细胞”较多。穹窿下器及终板处室管膜细胞纤毛少见 ,而正中隆起处可见大量纤毛及微绒毛 ,并可见单个散在的纤毛上皮细胞。中脑导水管壁具有平行走向的纵嵴 ,游离面可见大量纤毛、微绒毛及分泌泡。第Ⅳ脑室室管膜上皮具大量长纤毛及微绒毛 ,分泌泡罕见。第Ⅳ脑室脉络丛上皮游离面呈多型性 ,可见短小密集的微绒毛及处于不同分泌周期的分泌泡 ,以及形态各异的“丛上细胞” ,偶见纤毛上皮细胞及特殊的单鞭毛上皮细胞。脊髓中央管结构较简单 ,游离面可见大量长纤毛、微绒毛及分泌泡。 结论 大鼠脑脊髓?
Objective To investigate the regional structural characteristics of rat encephalomyelia ependymal epithelial cells and to explore its function. Methods using scanning electron microscopy. The results of the lateral ventricle ependymal epithelial cell free end showed irregular polygons, visible cilia and microvilli, occasionally secretion of bubbles. Lateral ventricular choroid plexus epithelial cells at the free end showed irregular polygons, fusiform or triangular, microvilli, rich secretion of secretions, cilia rare, visible “plexus cells.” The third ventricle ependymal epithelial cells have obvious regional, epithelial cells at the base of the ventricle microvilli short, scattered, a small amount of secreted particles, no cilia; lateral secretion of more bubbles, rich cilia; are visible “plexus cells.” The third ventricle choroid plexus epithelial cells showed a large number of slender microvilli, secretion of secretions and “plexus cells” less. The ependymal epithelium was fusiform in shape. The long axis was parallel to the interventricular foramina, with rare microvilli on the free surface. Subciliary devices and endplate ependymal cell cilia are rare, and the middle of the bulge can be seen at a large number of cilia and microvilli, and can be seen in a single scattered ciliated epithelial cells. The wall of the midbrain aqueduct has a longitudinal ridge parallel to it, showing a large number of cilia, microvilli and secreted vesicles on the free surface. The fourth ventricle ependymal epithelium with a large number of long cilia and microvilli, secretory secretions rare. The fourth ventricle choroid plexus free surface was polymorphic, showing short and dense microvilli and secretory vesicles in different secretory cycle, as well as morphologically different “plexiform cells”, occasionally ciliated epithelial cells and a special single flagella cell. The structure of the spinal cord central tube is relatively simple, a large number of long-cilia, microvilli and secreting vesicles can be seen on the free surface. Conclusion Rat brain spinal cord?