Anesthesia for neurosurgery is an important topic specially ininfants.Before going through, the anesthetist must know the physiology ofICP and how to control.Factors affecting CSF formation , what increases and whatdecreases are also important to be known.Neurosurgery specially in infants has critical hazards as bleedingand venous air embolism that should be prevented and well treated ifhappened.The anesthetist should take care of life threatening problems incertain neurosurgical procedures such as bleeding in craniostenosis…..etc.