Vascular Supply

Question 1

Where does the vertebral artery enter the skull?

Answer 1

Originates at the 1st branch of the subclavian, runs through foramina in cervical vertebrae c6, enters the base of the skull through the foramen magnum and ascends along the medulla

Question 2

What arteries account for most of the blood supply to the brain?

Answer 2

The two internal carotid arteries account for 85% of cerebral blood flow

Question 3

Name the arteries that form the circle of willis

Answer 3

1. internal carotid
2. anterior cerebral
3. posterior cerebral
4. anterior communicating
5. posterior communicating

Question 4

What large vessels is formed by the union of the two vertebral arteries?

Answer 4

Basilar artery

Question 5

What structure makes collateral circulation to the brain possible due to a vascular anastamosis at the base of the brain?

Answer 5

Circle of willis

Question 6

What artery supplies blood to the anterior and middle cerebral arteries?

Answer 6

Internal carotid

Question 7

What large arteries are formed by the bifurcation of the common carotid artery?

Answer 7

external and internal carotid

Question 8

The middle cerebral artery supplies what areas of the brain?

Answer 8

The insula, most of the lateral surface of the cerebral hemisphere, and the anterior tip of the temporal lobe

Question 9

The anterior cerebral artery supplies what areas of the brain?

Answer 9

The frontal lobe and medial aspects of the parietal and occipital lobes

Question 10

The posterior cerebral artery supplies what areas of the brain?

Answer 10

The roastal midbrain, posterior thalamus, medial occipital lobe, and inferior and medial surfaces of temporal lobe