小脑前下动脉的显微外科解剖

MICROSURGICAL ANATOMY OF THE ANTERIOR INFERIOR CEREBELLAR ARTERY

为了给听神经瘤手术提供显微解剖学资料 ,采用 15个成人新鲜头颅标本 ,颈内动脉及椎动脉灌注丙烯腈丁二烯苯乙烯 (ABS)后在手术显微镜下解剖观察。结果发现 ,小脑前下动脉出现率为 10 0 % ,其中分支迷路动脉、回返穿通动脉、弓下动脉和小脑弓下动脉的出现率分别为 10 0 %、86 .7%、80 %、16 .7%。迷路动脉走行于面听神经的下方 ,回返穿通动脉行于面听神经之间 ,弓下动脉行于面听神经的后上方。小脑前下动脉袢与内耳门关系密切 ,5 3 .6 %穿过面听神经之间。

The anatomy of the trunks and branches of anterior inferior cerebellar artery(AICA) was studied and its surgical importance especially in the operation for acoustic neuroma(AN), was discussed.15 fresh adult cadavers were perfused with ABS via internal carotid artery and vertebral artery and then dissected under operation microscope in detail. AICA was constantly present in all specimens. The incidence of labyrinthine artery(LA), recurrent perforating artery(RPA), subarcuate artery(SA),and cerebellar subarcuate artery (Cer.SA) was 100%,86.7%,80% and 16.7%, respectively. 97.1% of LA entering the internal auditory meatus (IAM) were located under the facial vestibulocochlear nerve complex, 56.7% of RPA passed between it ,and 75% of SA was located posteroinferiorly to it .60.7% of the loop of AICA was situated close to the IAM, and 53.6% of them lay between the Ⅶ and Ⅷ cranial nerves. These data may be helpful in microneurosurgical operation and radiography.