1.Anterior part of ambient cistern mainly contained anterior choroidal artery,basal vein of Rosenthal and P2segment of posterior cerebral artery. The fibrous trabeculae were not much in the cistern. Most trabeculae were scatter and short.
2.The cerebral falx and the interhemispheric fissure cistern were divided into superior, anterior and posterior segments by the corpus callosum and lateral ventricles according to Zimmerman′s description.
