Circle of willis

Question 1

What is the meaning of anastomosis

Answer 1

Alternative channels for the blood to flow through

Question 2

What can the posterior communicating artery do that the anterior communicating artery cannot

Answer 2

The posterior communicating artery can provide a back up if one gets occluded, the anterior communicating artery cannot do that

Question 3

Fill in the gaps

Answer 3

Question 4

What do the middle cerebral arteries supply

Answer 4

• Frontal, temporal and parietal parts of the brain

Question 5

What does PICA supply

Answer 5

Posterior of the cerebellum

Question 6

What does AICA supply

Answer 6

Anterior of the cerebellum

Question 7

What do the posterior cerebral arteries supply

Answer 7

Underside of brain + occipital

Question 8

What does the anterior cerebral artery supply

Answer 8

• Superior and medial areas of frontal and parietal lobes
• Corpus callosum

Question 9

What deficits can be seen if the anterior cerebral artery is occluded

Answer 9

• Primary motor areas of feet + legs affected as well as general sensory
• Also in control of high order thinking and impulse rational, affect motor functions of lower limbs and personality change, impulsive behaviour

Question 10

What areas of the brain does the middle cerebral artery supply

Answer 10

Lateral areas of frontal, temporal and parietal lobes

Question 11

What deficits can be seen if the middle cerebral artery is occluded

Answer 11

• If proximal route is occluded, lose supply to broccas area, primary somatosensory, primary motor areas and the frontal eye field

Question 12

What areas of the brain does the posterior cerebral artery supply

Answer 12

• Occipital lobe
• Inferior and medial surface of temporal lobe

Question 13

What deficits can be seen if the posterior cerebral artery is occluded

Answer 13

Damage leads to visual deficit or difficulty. to interpret images