婴儿脑视皮质区微血管密度的定量分析

目的：探讨婴儿第Ⅰ视皮质区内部微血管构筑的形态学特征。材料和方法：采用生后不足６个月的婴儿脑标本，经明胶墨汗灌注、组织切片观察、体视学测算等方法，对第Ⅰ视皮质我不同部位的皮质内微血管密度进行定量分析。结果：视皮质内的血管可分为４层，以第３层血管密度最高，第４层、第２层次之，第１层最低。视皮质后段（黄斑投射区）微血管密度最高，中段（周边视网膜投射区）次之，前段（视野颞侧新月投射区）最低。结论：在黄斑

QUANTITIVE ANALYSIS ON MICROVASCULAR DENSITY OF INFANT VISUAL CORTEX

To discuss the morphological characteristic of intracotex microvasculation of visual contex. Methods: Thirteen infant brains (no more than 6 months) were obtained. All the samples wre infused with 10% formaldehgde gelatin ink. The microvascular densities of frist visual area(17 th area) were calculated according to Elras' stereological methods. The data were analyzed by ANON. Results: We found that there were 4 layers of vascular network within visual cortex. The microvascular density of the 3rd layer was the highest, the 4th and 2nd layer were the next and the first layer was the lowest. The microvascular density of posterior segment of 17th area (projection area of macular flave) was the highest, middle segment (projection area of peripheral retina) was next and the anteriar segment(projecetion area of crescent area of temporal visual field) was the lowest. Conclusion: The differential microvascular density within frist visual area, which accords with its function and action, provides morphological foundation for cytodifferentiation and functional perfection of visual cortex before the infant macula flava vision development.