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Flashcards in CNS Arterial Supply Deck (37)
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1

Basilar artery bifurcates into _____ at midbrain.

2 PCAs

2

Before it bifurcates the Basilar artery gives off ____ & ____

AICA & SCA

3

What does AICA supply?

Anterior portions of inferior cerebellum, like flocculus & caudal pons

4

What does SCA supply?

Supplies superior cerebellum, caudal midbrain, rostral pons

5

What does does the Vertebral-Basiliar system supply?

Brainstem & cerebellum

6

Vertebral arteries run along lateral medulla & fuse to basilar artery at _____

pons

7

Prior to fusing with the basilar artery each gives rise to ...

Posterior spinal artery, anterior spinal artery, PICA

8

What does the posterior spinal artery supply?

posterior 1/3 of spinal cord

9

What do the anterior spinal arteries supply?

They join in the midline resulting in a single artery that supplies anterior 2/3 of spinal cord

10

The circle of willis connects ___ & ___, via _____

IC & Vertebral-Basiliar system, via Pcomm

11

What connects the right and left sides of the circle of willis?

Acomm

12

What is the path of Pcomm?

It passes posteriorly, inferior to the optic tract towards the cerebral peduncle and joins PCA, which is part of the vertebral system

13

What is the path of the internal carotid arteries?

Ascends neck, traverses petrous temporal bone, goes thru cavernous sinus, ophthalmic artery branches off as IC enters subarachnoid space, then IC travels along the optic chasm

14

IC bifurcates into ___ & ____

Middle & Anterior Cerebral Arteries

15

Prior to the bifurcation of the IC it gives off ____ & _____

anterior chorodial artery & Pcomm

16

___ ___ artery is long & thin, and clinically significant in strokes

anterior choroidal artery

17

What does the anterior choroidal artery supply?

optic tract, choroid plexis in temporal horn of lateral ventricle, internal capsule, thalamus, hippocampus, sometimes cerebral peduncle

18

_______ run laterally into lateral sulcus & divides into many branches

Middle cerebral artery

19

What is the path of the anterior cerebral artery?

It runs medially and enters the longitudinal fissure, then it arches posteriorly & follows corpus callosum

20

What does the anterior cerebral artery supply?

medial parts of frontal and parietal lobes

21

What connects the 2 anterior cerebral arteries?

the anterior communicating branch

22

What are lenticulostriate arteries?

Perforating arteries from MCA

23

Perforating arteries are numerous around what structures?

optic chiasm, between cerebral peduncles, anterior & posterior perforated substance

24

What do perforating arteries supply?

basal ganglia, thalamus, & internal capsule

25

Perforating arteries arise from ____ at the _____

all arteries, at the base of the brain

26

True or false: Perforating arteries can be involved in strokes & cause neurologic deficits out of proportion to their size.

True

27

Which two pairs of vessels supply much of the brain & spinal cord?

internal carotid arteries, vertebral arteries

28

Define blood-brain barrier

Anatomic & physiologic barrier that controls movement of materials from extracellular fluid of body to extracellular fluid of brain

29

The blood-brain barrier includes . . .

arachnoid, endothelial tight junctions & lack of pinocytic vesicles

30

____ soluble substances go thru the blood-brain barrier

Lipid