Meninges & CSF Flashcards
1
Q
Describe the progression of flow of the CSF.
A
- choroid plexus
- lateral ventricles
- intraventricular foramen- - Third ventricle
- cerebral aqueduct- - Fourth ventricle
- lateral aperatures of luschka-
- medial aperature of magendie- - Subarachnoid space/cisterna magna
- cortex/spinal canal/nerves
2
Q
What three aperatures does the CSF take to exit 4th ventricle to enter subarachnoid space?
A
- one medial aperature of magendie
- two lateral aperatures of luschka
3
Q
How much CSF is made every day?
A
500cc
4
Q
What is aseptic meningitis?
A
-non-bacterial
no neutrophils
5
Q
What is a meningioma?
A
-benign tumor of meningo endothelium
6
Q
What is hydrocephalus
A
-abnormal dilation and accumulation of CSF, usually due to an obstruction
7
Q
What does elevated red cells in CSF indicate?
A
- subarachnoid hemorrhage
- Hemorrhagic meningitis (HSV)
8
Q
What is Xanthochromia?
A
- yellow CSF
- Old blood
- could indicate a bleed
9
Q
What are two parts of the brain that lack a blood brain barrier?
A
- Area postrema -senses toxins
- OVLT -sense osmolar change, ADH decision
