MENINGES AND CSF

1. MENINGES & CSF
By: DR.KRUPA RAITHATHA
MPT. MUSCULOSKELETAL &SPORTS SCIENCES
LECTURER AT SCHOOL OF PHYSIOTHERAPY, RK.UNIVERSITY,
RAJKOT,GUJRAT,INDIA.

2. MENINGES

3. Introduction
• Brain is important but delicate organ.
• Protected by:-
o Bony covering of cranium
o Three membranous covering (meninges):
1. Outer dura mater
2. Middle arachnoid mater
3. Inner pia mater
• CSF fills space between arachnoid and
pia(subarachnoid space) and acts as
water cushion.

6. DURA MATER
• TWO LAYERS:
o Outer –endosteal
layer
o Inner meningeal
layer,enclosing
cranial venous
sinuses between the
two.
• meningeal layer
forms 4 folds..

8. ARACHNOID MATER
• Transparent mater
• Loosely surround
brain without
dipping into sulci.
• Separeted fron dura-
sub dural space
• Seperated from pia –
sub arachnoid space.

9. • Provide sheath for
cranial nerves
• Arachnoid villi are
small,fingerlike
process of arachnoid
tissue, projecting
into cranial venous
sinuses.
• Absorbs CSF.
• In advancing age
size increases, forms
pedunculated tufts,
called arachnoid
granulations, which
produces depression
in bone.

11. PIA MATER
• Thin vascular
membrane
• Dipping into
various sulci and
irregularities of
bones.
• Better defined
around the
brainstem.

12. • Provides sheaths for
cranial nerves.
• Provides
perivascular
sheaths.
• Folds of pia mater
enclosing tufts of
capillaries form the
telachoroidea.
• Forms choroid
plexus.

13. Extradural and subdural spaces

14. Subarachnoid space

15. Subarachnoid space
• Space between
arachnoid and pia
mater.
• It is traversed by
network of
arachnoid
trabeculae which
gives sponge like
appearance.

16. • Surrounds brain and
spinal cord.
• Ends at lower
border of S2.
• Contains CSF, Large
vessels of brain.
• Cranial nerves pass
through the space.

17. • At base of brain and
around the
brainstem it forms
intercommunicating
pools, called
cisterns.
• Arterial pulsation
force CSF from
cisterns on the
surfaces of
hemisphere.
• Forms cushions
around medulla.

18. Comunications of
subarachnoid space.

19. THANK YOU…