3. INTRODUCTION
150 mL capacity of brain is
occupied by CSF
Present in ventricle of brain, cistern
outside the brain and subarachnoid
space
All chambers are connected and the
pressure of the fluid is constant
4.
5. FORMATION OF CSF
500ml
secreted per
day
2/3rd is
secreted in
choroid plexus
Small amount
by ependymal
and arachnoid
surface
Small amount
from brain
through
perivascular
space
7. ABSORPTION OF CSF
Arachnoid Vili are fingerlike inward projections
Conglomerates of these structures: Arachnoid granulations
Endothelial cells of these vili allow free movement of: CSF; soluble proteins; RBC and WBC
9. CSF PRESSURE
Normal pressure is
when patient
horizontal
direction=130mm Hg
Low up to 65mm Hg of
water
As high as 195mm Hg
of water
Raised in brain tumor,
hemorrhage or
infection, some babies
are born with it