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spinal meninges (singular is meninx) - ✔✔-3 protective, connective tissue
coverings that encircle the spinal cord and brain.
superficial- dura mater
middle-arachnoid mater
deep- pia mater
spinal meninges- surround spinal cord and are continous with the cranial
meninges which encericle brain.
epidural space - ✔✔-a space between dura mater and the wall of the
vertebral canal
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,-spinal cord protected by a cushion of fat and connective tissue located in
this space
dura mater - ✔✔TOUGH MOTHER
-most superficial layer
-thick, strong, dense irreg. connective tissue
-forms a sac form the level of the foramen magnum in the occipital bone,
where it is continuous with the meningeal dura mater of the brain, to the
second sacral vertebra
-also continuous with the epineurium- the outer covering of the spinal and
cranial nerves
arachnoid mater - ✔✔SPIDER
- middle , thin, avascular, loosely arrangement collagen and elastic fibers
-contd though the foramen magnum with arachnoid mater of the brain
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, subdural space - ✔✔between dura mater and arachnoid mater is a space
called this
-contains interstitial fluid
pia mater - ✔✔DELICATE
-deepest, thin, transparent, connective tissue-squamous to cubodial cells
with interlacing bundles of collagen and elastic fibers.
-adheres to the surface of spinal cord and brain
-many blood vessels and supply O2 and nutrients to spinal cord
-denticulate ligaments- triangle shaped extensions that suspend into the
spinal cord in the middle of its dura sheath.
-they are thickenings of the pia mater
-project and fuse with arachnoid mater and dura mater
-protect spinal cord against sudden displacement that could result in shock
subarachnoid space - ✔✔-space between arachnoid mater and pia mater
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