应用ＮＡＤＰＨ脱氢酶反应（ＮＡＤＰＨｄ反应）显示ＳＤ大鼠黑质纹状体系统内一氧化氮合酶（ＮＯＳ）阳性细胞和末梢，用计算机图像灰度仪测其染色强度。结果：正常大鼠纹状体内存在的阳性神经元和末梢分布位置不同；高密度末梢分布于纹状体腹外侧缘，此区细胞数亦较多；低密度区分布于纹状体背内侧区，阳性细胞数亦较少。苍白球、丘脑和黑质未见ＮＯＳ阳性物质。 NADPH dehydrogenase reaction (NADPH  d reaction) showed nitric oxide synthase (NOS) -positive cells and terminals in the nigrostriatal system of SD rats, and their staining intensities were measured by computer image grayscale. Results: The distribution of positive neurons and terminals in normal striatum were different. High-density terminals were distributed in the lateral ventral edge of striatum, and there were many cells in this area. The low-density areas were located in the dorsal medial area of ​​striatum , The number of positive cells is also less. Globus pallidus, thalamus and substantia nigra had no NOS-positive substances.