...侧大脑半球之间的大脑纵裂，前端连于 鸡冠，后端连于小脑幕的顶，下缘游离于 胼胝体的上方 ②小脑幕（tentorium of cerebellum）：形 似幕帐，伸入大、小脑之间。位置： 后外侧缘附于枕骨横窦沟和颞骨岩部上缘May 2009 Copyright Depart.
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Objective To evaluate CT features of subdural hematomas at cerebral falx and tentorium of cerebellum.
目的探讨大脑镰、小脑幕硬膜下血肿的CT特点。
Conclusions The high density shape that was distributed in sulcus and cistern, tentorium of cerebellum, straight sinus and sagittal sinus is important for diagnosing SAH in neonates.
结论分布在脑沟脑池、小脑幕、直窦、矢状窦旁密度增高影是诊断新生儿蛛网膜下腔出血的重要征象。
SAH accounted for only 32 death cases (25%), most often caused by cerebrovascular malformation and ruptured intracranial aneurysm in the basis of brain or under tentorium of cerebellum.
以SAH为死亡原因者，32例，占25%，多见于脑血管畸形与动脉瘤破裂，出血部位多见于脑底及小脑天幕以下。
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