目的探讨经小脑延髓裂入路到达第四脑室的解剖研究，及在不切开下蚓部的情况下如何分离此裂隙以获得最佳的手术视野。
Objective To refine the transcerebellomedullary fissure approach to the fourth ventricle and dissect the fissure to obtain sufficient operative view without splitting the inferior vermis.
目的光镜下观察6只大鼠小脑前叶、后叶及蚓部微血管构筑。
Objective the microvasculature of the anterior lobe, posterior lobe and cerebellar vermis was observed under the optical microscope in 6 rats.
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