Lecture 6-Arterial Supply To The Brain

Question 1

Which arteries form the posterior circulation of the brain?

Answer 1

Vertebral arteries

Question 2

Which arteries form the anterior circulation of the brain?

Answer 2

Internal carotid arteries

Question 3

Which branches does the internal carotid artery give rise to?

Answer 3

Middle cerebral artery and anterior cerebral artery

Question 4

Which area does the middle cerebral artery supply?

Answer 4

Lateral aspects of the frontal and parietal lobes and superior aspect of temporal lobe

Question 5

Which area does the anterior cerebral artery supply?

Answer 5

Medial portions of the frontal and parietal lobes

Question 6

What is the basilar artery?

Answer 6

Fusion of two vertebral arteries

Question 7

What does the basilar artery bifurcate into and what do these arteries supply?

Answer 7

Two posterior cerebral arteries -> occipital lobe and posterior part of temporal lobe

Question 8

What is the Circle of Willis and which arteries form it?

Answer 8

Allows collateral supply in case there is a blockage somewhere
Posterior communicating arteries connect posterior circulation and anterior circulation and anterior communicating artery connects two anterior cerebral arteries

Question 9

What does the anterior spinal artery supply?

Answer 9

Anterior 2/3 of the spinal cord

Question 10

What do the pontine branches of the basilar artery supply?

Answer 10

Pons

Question 11

What are the cerebellar arteries and what do they cross?

Answer 11

Superior cerebellar, posterior inferior cerebellar, anterior inferior cerebellar cross brainstem to cerebellum and therefore supply the brainstem

Question 12

What are the lenticulostriate arteries branches of?

Answer 12

Middle cerebral arteries

Question 13

Which artery are susceptible to emboli and why?

Answer 13

Lenticulostriate arteries because small lumen