Arterial Blood Supply To Brain

Question 1

What can the arterial blood supply to the brain be divided into?

Answer 1

Anterior circulation

Posterior circulation

Question 2

What artery gives rise to the anterior circulation?

Answer 2

Internal carotid artery

Question 3

How does the internal carotid artery give rise to the anterior circulation?

Answer 3

Divides into anterior and middle cerebral arteries

Question 4

When does the internal carotid artery divide into the anterior and middle cerebral arteries?

Answer 4

After is has given off the ophthalmic artery

Question 5

What part of the brain does the anterior cerebral artery supply?

Answer 5

Medial frontal lobe

Medial parietal lobe

Question 6

What functions of the brain does the anterior cerebral artery supply?

Answer 6

Legs and feet of sensory and motor homunculi

Question 7

What part of the brain does the middle cerebral artery supply?

Answer 7

Lateral frontal lobe

Lateral parietal lobe

Superior temporal lobe

Question 8

What functions of the brain does the middle cerebral artery supply?

Answer 8

Hands and face of sensory and motor homunculi

Visual pathway in temporal lobe i.e. superior optic radiations

Question 9

What branches does the middle cerebral artery give off?

Answer 9

Lenticulo-striate arteries

Question 10

What do lenticulo-striate arteries supply?

Answer 10

Motor pathways

Question 11

Which arteries give rise to the posterior circulation?

Answer 11

Vertebral arteries

Question 12

How do the vertebral arteries give rise to the posterior circulation?

Answer 12

Join together to form the basilar artery

Also give off

• posterior inferior cerebellar artery
• anterior spinal artery

Question 13

Where does the basilar artery run?

Answer 13

Midline

Against clivus of occipital bone

Question 14

What are the branches of the basilar artery?

Answer 14

Anterior inferior cerebellar artery

Pontine branches

Superior cerebellar artery

Question 15

How does the basilar artery end?

Answer 15

Divides into right and left posterior cerebral arteries

Question 16

What part of the brain does the posterior cerebral artery supply?

Answer 16

Inferior temporal lobe

Occipital lobe

Brainstem

Question 17

What do the pontine branches supply?

Answer 17

Pons of brainstem

Question 18

What does the superior cerebellar artery supply?

Answer 18

Upper cerebellum

Brainstem

Question 19

What does the anterior inferior cerebellar artery supply?

Answer 19

Front lower cerebellum

Brainstem

Question 20

What does the posterior inferior cerebellar artery supply?

Answer 20

Back lower cerebellum

Brainstem

Question 21

What is the circle of Willis?

Answer 21

Circle of arteries supplying the brain

Question 22

How is the circle of Willis formed?

Answer 22

Anterior communicating artery joins anterior cerebral arteries

Posterior communicating artery joins the anterior and posterior circulations

Question 23

What is the purpose of the circle of Willis?

Answer 23

Collateral blood supply

So there is still some blood supply to brain tissue in the case of blockage of one of the arteries

Question 24

What does the anterior spinal artery supply?

Answer 24

Anterior 2/3 of spinal cord

Question 25

How is the anterior spinal artery formed?

Answer 25

Vertebral arteries give off a branch

Branches join together to form anterior spinal artery