幼儿小脑齿状核的微血管构筑

目的:以幼儿为研究对象观察小脑齿状核微血管构筑的形态学特点。方法:采用改良碱性磷酸酶染色法显示小脑齿状核内的微血管形态及吻合,并测血管密度。结果:本实验首次成功地显示出小脑齿状核内微静脉,且观察到微动脉和微静脉间的吻合。小脑齿状核的微血管多为树根状,分支多以大锐角和弧形发出,且彼此吻合成网,其密度明显高于周围髓质区。结论:小脑齿状核内微血管近似直角和弧形的弯曲,可能是该区易发生出血的形态学基础。其密度较周围髓质高很多,与该部位神经细胞需氧量较大,代谢较活跃有关。

Microvasculature in cerebellar dentate nuclei of infant

Objective: To explore the morphological characteristics of the microvasculature in cerebellar dentate nuclei of infants.Methods: The modified alkaline phosphatase staining method was adopted to study the structure of microvasculature in cerebellar dentate nuclei of infants.Results: The study showed the veinule and the anastomoses of microvasculature.Most of the microvasculature of cerebellar dentate nuclei was in root shape.Their rami were emitted by a large sharp angle or arc shape,and they anastomosed into meshes each other.The densities of the microvasculature were markedly higher than that of the medulla area.Conclusion: The right angle or arc shape of microvasculature is possiblely the morphological basis of hemorrhage in the area.The densities of the microvasculature are markedly higher than that of the medulla area,possiblely related to the larger consumption of oxygen and the active metabolizability of the nerve cells in the area.