CSF is abbreviation of cerebrospinal fluid. It is made in choroid plexus, circulates brain, and emits in vein.
CSF is maintained about 150cc(adult) or 50cc(baby), and replaced 3~4 times in a day.
If the amount of CSF is increased, brain orders choroid plexus to decrease the production of CSF or to increase the emission of CSF by homeostatic action.