Week 1 - Lesson 5

Question 1

How many arteries does the brain receive blood from?

Answer 1

4

Question 2

What are the 4 arteries that the supplies the brain? (2)

Answer 2

1. Paired ICA

2. Paired vertebral arteries

Question 3

What joins the ICA and the vertebral arteries?

Answer 3

The basilar artery

- at the base of the brain

Question 4

What does the basilar artery form?

Answer 4

The circle of Willis

Question 5

What does the circle of willis supply?

Answer 5

The cerebral lobes with many smaller branches reaching the periphery

Question 6

What does the ICA branch to form?

Answer 6

The anterior cerebral

Question 7

What does the anterior cerebral supply? (3)

Answer 7

1. Anterior cerebral artery
2. Middle cerebral artery
3. Posterior communicating artery

Question 8

What is formed with the joining of the vertebral arteries?

Answer 8

The basilar artery

Question 9

What does the basilar artery give rise to?

Answer 9

The posterior cerebral branches

Question 10

What percent of the population presents with the normal configuration of the Circle of Willis?

Answer 10

50%

Question 11

What percent of the cardiac output supplies the brain?

Answer 11

15%

Question 12

Why is there little circulatory reserve?

Answer 12

Due to the brain’s high metabolic rate

Question 13

What is needed in cerebral hemodynamics?

Answer 13

A constant supply of oxygen

Question 14

What does the brain not have?

Answer 14

Significant oxygen or glucose stores

Question 15

What is the brain entirely dependent on?

Answer 15

The vascular system for maintenance

Question 16

What can bring on symptoms of cerebral dysfunction?

Answer 16

Short episodes of cerebral flow

Question 17

How long does it take for cerebral death to occur?

Answer 17

3-8 minutes

Question 18

What does the ICA supply?

Answer 18

The anterior circulation via the anterior and middle cerebral arteries

Question 19

What does the ICA give rise to?

Answer 19

The posterior communicating arteries

Question 20

What is the posterior circulation supplied by?

Answer 20

The vertebral arteries via the basilar artery

Question 21

What does the posterior circulation give rise to?

Answer 21

The posterior cerebral arteries

Question 22

What is the artery where a stroke occurs?

Answer 22

In the middle cerebral artery

Question 23

What does the MCA supply? (2)

Answer 23

1. Frontal cortex

2. Parietal cortex

Question 24

What does the anterior cerebral artery supply? (3)

Answer 24

1. Frontal lobes
2. Medial aspects of the parietal lobes
3. Medial aspects of the occipital lobes

Question 25

What does the posterior cerebral artery supply? (2)

Answer 25

1. Occipital lobe
2. Inferior temporal lobes
   - including hippocampus

Question 26

What does the vertebral arteries supply?

Answer 26

The medulla

Question 27

What does the basilar artery supply? (2)

Answer 27

1. Pons
2. Cerebellum

• pontines and cerebellar branches