Circle of Willis

Question 1

Anastomosis of internal carotid and vertebral arteries at base of brain

Answer 1

Circle of Willis

Question 2

Severing of opthalmic artery

Answer 2

results in blindness (no functional anastomoses). Central Artery of retina branches off of it

Question 3

Source of anterior and middle cerebral arteries

Answer 3

internal carotid artery

Question 4

Vertebral arteries join to form…

Answer 4

basilar artery

Question 5

Basilar artery terminates and gives rise to…

Answer 5

posterior cerebral arteries (one to a side)

Question 6

All arteries in the Circle of Willis are branches of the internal carotid arteries except…

Answer 6

Posterior Cerebral Artery

Question 7

Components of the Circle of Willis

Answer 7

1) Posterior Cerebral Artery
2) Posterior Communicating Artery
3) Internal Carotid Artery
4) Anterior Cerebral Artery
5) Anterior Communicating Artery

Question 8

Connects anterior cerebral arteries of two sides

Answer 8

anterior communicating artery

Question 9

Connects posterior cerebral to internal carotid artery

Answer 9

posterior communicating artery

Question 10

Most common location of a Berry Aneurysm

Answer 10

Circle of Willis