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摘要目的：:为神经外科临床提供解剖学资料。方法：:手术显微镜下观察50例成人脑标本小脑动脉的起始、行径、主要分支、穿动脉及大致分布，检查各小脑动脉与出入脑干的颅神经的接触关系。结果：:50例人脑有小脑下后动脉（PICA）94支，小脑下前动脉（AICA）97支和小脑上动脉（SCA）112支。2侧PICA和12侧SCA接触三叉神经根，2侧AICA接触面神经根，动脉与神经根接触多形成压迹。结论：:小脑动脉的局部解剖有助于神经外科医生在颅后窝手术时，对这些动脉尤其是行程可能有变异的动脉及穿支要特别谨慎，避免损伤，并保护与小脑动脉关系密切的脑神经根；对某些脑干血管综合征患者及某些三叉神经痛、面肌痉挛患者采取相应的治疗。

abstractsObjective::To provide the anatomical data for neurosurgery.Methods::Under operative microscope the origins, courses,branches, and distributios of the cerebellar arteries were examined in 50 postmortal adult brains.Results::The cerebellar arteries comprise of the posterior inferior cerebellar artery(PICA), the anterior inferior cerebellar artery(AICA), and the superior cerebellar artery(SCA). There are 94 PICA and 112 SCA in 50 brains. Two PICA and 12 SCA contact the root of trigeminal nerve. Two AICA contact the root of facial nerve.Conclusions::The anatomical data of the cerebellar arteries are necessary for safe neurosurgical operations in the posterior cranial fossa. Great care must be taken to avoid damage to the vessels and the nerves. The findings observed in this study may help the neurosurgeons and neurologists to explain some symptons and signs in patients with certain vascular syndroms of the brain stem, of with trigeminal neuralgia, of with facial spasm, and to manage these patients.