Week 2: Strokes

Question 1

What are the two major arteries that supply blood supply?

Answer 1

Internal carotid and vertebral arteries

Question 2

What is the positives and negatives of the circle of Willis?

Answer 2

-protects the brain via collateral circulation( other arteries can compensate for this and still ensure appropriate profusion for the brain)
-arteries that come off the circle of Willis e.g. ACA,MCA and PCA so these are not protected by collateral system

Question 3

What does anterior cerebral artery supply?

Answer 3

Medial and superior part of the frontal lobe, anterior parietal lobe.
This includes

Question 4

what does the middle cerebral artery supply?

Answer 4

the lateral cerebral surfaces and deep structures such as basal ganglia and internal capsule.

Question 5

what does the posterior cerebral artery supply?

Answer 5

the occipital lobe and inferiomedial temporal lobe and thalamus

Question 6

what does the basilar artery supply?

Answer 6

brain stem(mid brains, pons, medulla) and cerebellum

Question 7

what is a stroke?

Answer 7

a stroke is caused by a disruption of blood supply to the brain resulting in a sudden and lasting neurological deficits.

Question 8

What is a tia?

Answer 8

It’s a mini stroke which is caused by a temporary disruption of blood supply to the brain which can cause sudden symptoms similar to a stroke. The effects are resolved within 24 hours

Question 9

What occurs for a lacunar stroke?

Answer 9

-pure sensory stroke
-pure motor stroke
-sensorimotor stroke
-ataxic hemiparesis

Question 10

What occurs for a posterior circulation stroke?

Answer 10

-cranial nerve palsy and contralateral motor/sensory deficits
-bilateral motor/sensory deficits
-cerebellar dysfunction
-isolated homonymous hemianopia