neuroanatomy: blood supply of the brain

Question 1

the brain is supplied by 2 arteries; which are ?

Answer 1

1. internal carotid artery ( ICA)
2. vertebral artery

Question 2

internal carotid artery supplies what type of circulation of the brain?

Answer 2

anterior circulation of the brain ; is supplied via internal carotid artery

Question 3

vertebral artery supplies what type of circulation of the brain?

Answer 3

posterior circulation of the brain; is supplied via vertebrobasillar artery.

Question 4

ICA gives what percentage of blood to the brain and vertebral gives what % of blood to brain ?

Answer 4

ICA - 80%
vertebral - 20%

Question 5

ICA ascends to the brain and then splits, giving rise to two major cerebral arteries; what are they called?

Answer 5

the anterior cerebral artery and middle cerebral artery

Question 6

what connects the two major cerebral arteries together ( anterior cerebral artery and middle cerebral artery )

Answer 6

anterior communicating artery

Question 7

what gives rise to the posterior communicating artery ?

Answer 7

the internal carotid artery

Question 8

what does the anterior cerebral artery supply?

Answer 8

the frontal lobe and the medial part of the parital lobes

Question 9

what does the medial cerebral artery supply ?

Answer 9

lateral surface of cerebral hemispheres

Question 10

before the ICA splits into two, it gives rise to what branch

Answer 10

the choroidal artery

Question 11

the choiroidal artery supplies what important structure?

Answer 11

The choroidal arteries are a network of arteries that primarily supply blood to the choroid plexus, which is a specialized structure located within the ventricles of the brain. The choroid plexus is responsible for producing cerebrospinal fluid (CSF)

Question 12

what does the posterior communicating artery connect ? (2)

Answer 12

posterior connecting artery connects the ICA and POSTERIOR CEREBRAL ARTERIES together (thus, anterior and posterior circulations of the brain are connected )

Question 13

the vertebral artery overall gives rise to what generally speaking?

Answer 13

posterior cerebellar artery

Question 14

what two branches do the posterior cerebellar arteries give rise to ?

Answer 14

1. posterior inferior cerebellar artery ( PICA)
2. Superior Cerebellar Artery (SCA)

Question 15

what does the posterior inferior cerebellar artery supply?

Answer 15

it supplies the posterior inferior portion of the cerebellum and the choroid plexus of fourth
ventricle

Question 16

what gives rise to the anterior inferior cerebellar artery ?

Answer 16

the posterior inferior cerebellar artery branches off to supply the anterior inferior cerebellar artery branch. the AICA gives rise to the anterior inferior portion of the cerebellum and the pons

Question 17

the anterior spinal artery supplies the anterior spinal cord; where does the anterior spinal artery branch off from ?

Answer 17

the vertebral artery

Question 18

the vetebral artery comes together to form what artery and at what level ?

Answer 18

• basillar artery at the level of the base of the pons

Question 19

the basillar artery gives rise to what two types of arteries ?

Answer 19

1. anterior inferior cerebellar artery
2. superior cerebellar artery

( 2 of each of the 2 types )

Question 20

at the level of what structure of the brainstem, does the basillar artery split into two posterior cerebral arteries

Answer 20

at the level of the midbrain

Question 21

the posterior cerebral arteries supply what areas of the cerebral hemispehere ?

Answer 21

medial and inferior surfaces of the occipital and temporal lobes

Question 22

the anterior cerebral arteries and the ICA and the posterior cerebral arteries are all connected to form the ?

Answer 22

CIRCLE OF WILLIS

Question 23

the connection between the anterior cerebral artery, ICA, posterior cerebral artery, allows for what, during the blockage of a vessel on one side of the brain

Answer 23

it allows for blood flow to continue if a major vessel is blocked on one side of the brain.