Neurobiology - Blood Supply, Meninges, and CSF

Question 1

True or false: there is an epidural space within the cranium.

Answer 1

False

Question 2

What are the two major cisterna for CSF collection? Where are they located?

Answer 2

cerebellomedullary cistern (cisterna magnum) - between the cerebellum and medulla
lumbar cisterna - surround the cauda equina

Question 3

Cranial dura mater splits into what two layers? To what are they attached?

Answer 3

periosteal layer - attached to inside of calvaria

meningeal layer - attached to arachnoid

Question 4

What lies between the two cranial dura mater layers?

Answer 4

dural sinus

Question 5

Define an epidural hematoma

Answer 5

blood accumulating between the calvaria and cranial dura mater

Question 6

Define a subdural hematoma

Answer 6

hemorrhage into potential space between dura mater and arachnoid

Question 7

What is the name of the sheet of dura formed when the meningeal dura layer extends into a fissure of the brain and then folds back toward the periosteal layer?

Answer 7

dural reflection

Question 8

What are the three major dural reflections? Where are they located?

Answer 8

falx cerebri - lies along longitudinal fissure
tentorial cerebelli - lies between occipital lobe and cerebellum (transverse fissure)
diaphragma sellae - covers the floor of the cranium (separates pituitary from the rest of brain)

Question 9

What feature of the tentorial cerebelli wraps around the mesencephalon?

Answer 9

tentorial notch