3. Dualinfluences of some structures skull and dura: protection of brain facilitate increased intra-cranial pressure 关s 大脑大静脉 下矢状窦 V. cerebri ma 然m Diaphragma sellae trous superior inus sphanopanetalis 侧而观3.Dual influences of some structures skull and dura: protection of brain facilitate increased intra-cranial pressure