riventriculartissuesofferlittleresistancetotheflowofCSF+-irculationCSFpressureisinequilibriumwithcapillarypressure(determinedbythearteriolartone)AnincreaseinbloodPCO2(hypoventilation)decreasespHandarteriolarresistance,thisinturngivesrisetoincreasedCSFpressurebyincreasingcerebralbloodflowHyperventilationhastheoppositeeffectCSFpressureNormalintracranialpressure(ICP)inanadultisbetween2-8mmHg.ocauseischemicdamageCSFpressureIncreasedvenouspressurehasadirecteffectonCSFpressureDownstreamblockofvenousflowincreasesthevolumeofcerebralveins,duralsinuses,andthesubarachnoidspaceThefunctionoftheCSFTheCSFactsasa“waterjacket”forthebrainandspinalcordThe1300gadultbrainweighsapproximately45gwhensuspendedinCSFThefunctionoftheCSFTheCSFactslikea“sink”,positionhelpsmaintainastablemediumforexcitablecells(neurons)
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