what are the layers of meninges, inside to outside?
pia mater, arachnoid, dura
what is the name for arachnoid and pia mater together?
what is the name for the meninges around the cerebral hemispheres?
what is the name for the meninges around the cerebellum?
what are the third and lateral ventricle separated by?
what is the CSF canal in the medulla/spinal cord?
what space comes off the fourth ventricle before the cerebellum?
where is the choroid plexus?
the lateral, third, and fourth ventricle
what is the function of the choroid plexus?
1. produces CSF that:
- cushions brain, spinal cord
-maintians stable extracellular environment for neurons and glia
- removes waste product
what is the medullary velum
pia mater and ependymal cells
what does choroid epithelium do?
prevents peptides, protiens, other large molecules from blood filtrate into CSF.
what are the capillaires like in the choroid plexus?
fenestrated - leaky
what makes up the blood-CSF barrier?
the choroid epithelium
what is the choroid epithelium?
ependymal cells with tight junctions
what is flow of CSF fluid?
1. lateral ventricles
2. interventricular foramen
3. third ventricle
4. cerebral aqueduct
5. fourth ventricle
6. central canal/lateral recess
7. subarachnoid space
8. arachnoid villi
9. dorsal sagittal sinus
where is the falx cerebri located?
what happens when cerebral aqueduct narrowed?
hydrocephalus - enlargement of cerebral ventricle