W20/Neuro peer tute Flashcards Preview

6. Neuro > W20/Neuro peer tute > Flashcards

Flashcards in W20/Neuro peer tute Deck (26):
1

What are the 3 layers of the meninges?

Dura
Arachnoid
Pia

2

What's the difference between the cranial and spinal meninges?

The cranial dura mater has 2 layers, while the spinal dura mater is only the layer continuous with the inner cranial dura mater layer

3

Describe some characteristics of the arachnoid layer

Thin
Avascular
Spiderweb-like in appearance

4

What is the fancy name for the outer cranial dural layer?

Periosteal layer

5

What is the fancy name for the inner cranial dural layer?

Meningeal layer

6

Which layer of the dura mater forms the falces?

The inner (meningeal) layer

7

What are the 4 falces?

Falx cerebri
Tentorium cerebri
Falx cerebelli
Diaphragma sellae

8

What are three major types of brain herniations?

Subfalcine (aka cingulate)
Transtentorial (aka uncal)
Tonsillar

9

Which herniation is the most common

Subfalcine

10

Which herniation is common in sub-arachnoid bleeds?

Transtentorial

11

Which herniation is most dangerous?

Tonsillar

12

How does CSF get back into the venous system?

Via the arachnoid granules (/villi) that project into the sinuses

13

Which meningeal space has the CSF?

Subarachnoid

14

Which meningeal spaces are potential spaces only?

Eipdural (except in spine - it's an actual space)
Subdural

15

What are the ridges of the cerebrum called?

Gyri

16

What are the grooves of the cerebrum called?

Sulci

17

Which fissure divides the L and R cerebral hemispheres?

Superior sagittal fissure
(aka longitudinal fissure)

18

Which fissure separates the frontal from the temporal lobe?

Lateral fissure
(aka Sylvian fissure)

19

Which fissure separates the frontal and parietal lobes?

Central sulcus

20

What is the post-central gyrus for?

Sensation

21

What is the pre-central gyrus for?

Motor control

22

What is the huge bundle of axons that joins the R and L hemispheres called?

The corpus callosum

23

What is the Monro Kelly doctrine?

The cranial cavity is a closed box, so its volume is constant, and composed of brain, CSF, blood

24

What equation illustrates the Monro Kelly doctrine?

Vcc = Vbrain + Vcsf + Vblood

25

What is normal ICP?

1-15 mmHg

26

What ICP constitutes a medical emergency?

>25 mmHg