Vesicles to Ventricles -CSF and Blood Supply Flashcards Preview

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Flashcards in Vesicles to Ventricles -CSF and Blood Supply Deck (49):
1

Why is the brain so dependent upon a constant blood supply?

neurons lack glycogen

2

What forms the BBB?

astrocytes and endothelial cells

3

Where do the 2 main arterial blood supplies to the brain stem from?

the internal carotid and the vertebral arteries

4

The anterior circulation system arises from the ____ and supplies the _____.

internal carotid artery; anterior half of the brain and medial occipital lobe

5

The posterior circulation system arises from the _____ and supplies the ____.

vertebral arteries; brainstem, cerebellum, the medial occipital lobe, and the inferior temporal lobe

6

The _____ arises from the internal carotid artery and supplies the anterior half of the brain and medial occipital lobe.

anterior circulation system

7

The _____ arises from the vertebral arteries and supplies the brainstem, cerebellum, the medial occipital lobe, and the inferior temporal lobe.

posterior circulation system

8

What are the 2 major terminal branches of the internal carotid artery?

the anterior cerebral artery and the middle cerebral artery

9

What does the middle cerebral artery supply?

the frontal, parietal, and temporal lobes

10

What supplies the frontal, parietal, and temporal lobes?

the middle cerebral artery

11

What supplies the anterior two-thirds of the cerebral hemispheres and the orbital cortex?

the anterior cerebral artery

12

What does the anterior cerebral artery supply?

the anterior two-thirds of the cerebral hemispheres and the orbital cortex

13

At the level of the pons, the _____ fuse to form the basilar artery.

vertebral arteries

14

At the level of the pons, the vertebral arteries fuse to form the _____.

basilar artery

15

The posterior cerebral arteries supply the _____ and the _____.

medial face of the occipital lobe; inferior surface of the temporal lobe

16

The _____ supply the medial face of the occipital lobe and the inferior surface of the temporal lobe.

posterior cerebral arteries

17

The _____ give rise to the anterior and posterior spinal arteries.

vertebral arteries

18

The vertebral arteries give rise to the _____.

anterior and posterior spinal arteries

19

This artery branches off the vertebral artery, wraps around the medulla, and supplies most of the most caudal part of the cerebellum.

PICA

20

This artery branches off the basilar artery, wraps around the caudal pons, and supplies the more anterior portions of the inferior face of the cerebellum.

AICA

21

This artery branches off the basilar artery, wraps around the rostral pons, and enters the posterior fossa supply by the superior face of the cerebellum.

superior cerebellar artery (SCA)

22

What is the Circle of Willis?

the connection of the posterior and anterior circulations via a series of arteries

23

This is the connection of the posterior and anterior brain circulations via a series of arteries.

the Circle of Willis

24

What is the dura mater?

a leathery layer closely applied to the cranium; the deepest layer

25

What is the pia mater?

a single layer of cells covering the outside of the CNS; most superficial layer

26

This is a single layer of cells covering the outside of the CNS.

the pia mater

27

What is the arachnoid mater?

a loose, spongy layer btw the pia and dura

28

This is a loose, spongy layer btw the pia and dura.

the arachnoid mater

29

This is a leathery layer closely applied to the cranium; the deepest layer.

the dura mater

30

What are the ventricles?

fluid-filled spaces within the brain

31

These are the fluid-filled spaces within the brain.

the ventricles

32

What is the cerebral aqueduct?

the connection btw the third and fourth ventricles

33

This is the connection btw the third and fourth ventricles.

the cerebral aqueduct

34

What is the fourth ventricle connected to?

the cerebral aqueduct and the subarachnoid space (via three apertures)

35

What is ependymal?

a single layer of cells that lines the ventricles

36

This is a single layer of cells that lines the ventricles.

ependymal

37

The ventricles are filled with _____.

CSF

38

What produces CSF?

the choroid plexus

39

Where is most of the CSF found?

in the subarachnoid space

40

How much CSF is produced per day?

500mL (it's replaced 4x/day)

41

CSF returns to the blood primarily via _____.

arachnoid granulations (villi)

42

Where are arachnoid granulations found?

lining the principle dural sinuses

43

What lines the principle dural sinuses?

arachnoid granulations (villi)

44

If there is a failure of reabsorption of CSF or if it cannot flow, ______ increases resulting in _____.

intracranial fluid pressure; hydrocephalus

45

If the flow of CSF is interrupted, a _____ results.

non-communicating hydrocephalus

46

If the CSF gets to subarachnoid space but isn't reabsorbed properly, it is called ______.

communicating hydrocephalus

47

What is a communicating hydrocephalus?

when the CSF gets to subarachnoid space but isn't reabsorbed properly

48

What is a non-communicating hydrocephalus?

when the flow of CSF is interrupted

49

What is a hydrocephalus?

a failure of reabsorption or flow of CSF