Objective: to get anatomical parameters of pyriform aperture area and to investigate its clinical significance.
目的：获得有关梨状孔的各项解剖学数据并探讨其临床意义。
2
Objective: To study the scanning electron microscopic (SEM) characteristics of floor between lateral recess and lateral aperture of the fourth ventricle in the mice with vascular dementia (VD).
目的：观察血管性痴呆（VD）小鼠第四脑室外侧隐窝与外侧孔之间室管膜游离面扫描电镜特征。
3
Objective to made the anatomic observation on the piriform aperture and its peripheral bone structure for the clinical reference.