The cisterna ambiens, cisterna corporaquadrigemina, corpus callosum, posterior of the third ventricle, system of Galen veins, pineal gland and corpora quadrigemina were observed.

• 观察手术径路中环池、四叠体池、胼胝体压部、三脑室后部、大脑大静脉系统、松果体、四叠体的显露范围。