Cerebral Ventricle NeoplasmsCerebral VentriclesInjections, IntraventricularFourth VentricleCisterna MagnaHeart VentriclesShiveringCerebral ArteriesInjectionsBody TemperatureLateral VentriclesBrainCerebrospinal FluidPempidineHypothalamusEpendymaCerebral InfarctionHypnosis, AnestheticBody Temperature RegulationPhysostigmineHexamethonium CompoundsCatsTranylcypromineThird VentricleSubarachnoid SpaceCerebral PalsyCerebrovascular CirculationConsciousnessHistamine AgentsMiddle Cerebral ArteryPerfusionPyrogensHydrocephalusSerotoninDogsChoroid PlexusNorepinephrineBlood PressurePhentolamineLysergic Acid DiethylamideDrinking