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本文应用扫描、透射和免疫电镜方法较全面地观察、比较和验证了大鼠第三脑室内的接触脑脊液神经元。实验结果表明:在第三脑室内存在接触脑脊液的神经元胞体、树突和轴突。神经元胞体为多角形、锥体形或梭形,具有神经细胞的结构特征,并首次在透射电镜下发现大鼠第三脑室内存在双极神经元。树突穿过室管膜细胞之间伸入第三脑室,末端呈蕈状或杵状膨大。轴突穿行于脑室内,含有突触囊泡。本文首次在超微结构水平证实第三脑室内接触脑脊液的树突和轴突末梢呈胆囊收缩素免疫反应阳性。上述实验结果为解释脑—脑脊液神经体液回路提供了超微结构基础。
In this paper, the scanning, transmission and immunoelectron microscopy methods were used to observe, compare and verify the cerebrospinal fluid neurons in the third ventricle of rats. The experimental results show that in the third ventricle there is cerebrospinal fluid contact with neuronal soma, dendrites and axons. The cell bodies of the neurons are polygonal, pyramidal or fusiform, and have the structural characteristics of nerve cells. For the first time, bipolar neurons are found in the third ventricle of rats under transmission electron microscope. The dendrites penetrate between the ependymal cells into the third ventricle and end to a mushroom or clubbing enlargement. Axon line through the brain, containing synaptic vesicles. This article for the first time in the ultrastructure level confirmed that the third ventricle contact cerebrospinal fluid dendrites and axons were cholecystokinin-positive immune response. The above experimental results provide an ultrastructural basis for explaining the neuro-fluid circuits of the brain-cerebrospinal fluid.