长爪沙鼠脑底前后交通动脉变异类型分析

目的解剖观察成年长爪沙鼠脑底动脉前后交通支的缺失变异类型。方法选用128只成年长爪沙鼠,脑缺血死亡或乙醚麻醉处死后,解剖后在镜下对其脑底表面的动脉及前后交通支进行了观察。结果所解剖的长爪沙鼠存在7种前交通支的变异类型和5种后交通支变异类型。其中,前交通支缺失的类型占总数的46·1%,后交通支的缺失类型占总数的85·2%,两者同时缺失的概率为39·27%,与单侧结扎的方法制备脑缺血模型的成模率相近。结论长爪沙鼠的脑底动脉前后交通支存在多种变异,尤其是某些个体存在完整的后交通支。

Variation of Anatomical Patterns of Brain Anterior and Posterior Communication Arteries in Mongolian Gerbils

Objective To illucidate the variation of anatomical patterns of brain anterior and posterior communication arteries in adult Mongolian gerbils. Methods 128 adult gerbils were included in this study. The animals died from cerebral ischemia or were sacrificed by anesthesia and were autopsied. The arteries on the ventral surface of the brain were studied under a dissection microscope. Results Seven different patterns of anterior communication arteries (ACA) and five patterns of posterior communication arteries (PCoA) were found in the gerbils. Absence of left or right ACA was observed in 46.1% of this group and 85.2% of the gerbils was lack of PCoA. Conclusion The brain anterior and posterior communication arteries in adult gerbils have several anatomical patterns, especially some gerbils have complete posterior communication arteries.