4.2 Blood supply

Question 1

shape of aneurysms in CoW

Answer 1

berry

Question 2

kidney disease with strong link to berry aneurysms in CoW

Answer 2

polycystic kidney disease

Question 3

aneurysm is posterior communicating artery could lead to what signs?

Answer 3

ipsilateral CN3 palsy, due to running parallel

Question 4

course of anterior cerebral artery

Answer 4

branch of ICA, loops back over superior surface of corpus callosum

branches to medial aspects of cerebral hemispheres mainly frontal and parietal lobes

Question 5

white matter distribution of anterior cerebral artery

Answer 5

corpus callosum

Question 6

sub falcine herniation

Answer 6

medial mass effect from frontal/oarietal/temporal lobe pushing cingulate gyrus under flax cerebra, can compress anterior cerebral artery causing stroke syndrome

Question 7

subcortical distribution of posterior cerebral arteries

Answer 7

branches to midbrain

branches to thalamus (perforate and ascend)

Question 8

course of posterior cerebral artery

Answer 8

bifurcation of basilar, loops round midbrain then along inferior surface of posterior hemisphere

supplies occipital lobe and inferior temporal lobe

Question 9

what sort of signs would a posterior cerebral artery aneurysm cause?

Answer 9

sensory and visual due to occipital lobe and visual cortex involvement

Question 10

lacunar infarct

Answer 10

occlusion of lenticulostriate arteries

Question 11

where do the lenticulostriate arteries arise from?

Answer 11

perforating branches of middle cerebral artery

Question 12

what type of stroke would a lacunar infarct in 1. thalamus, 2. internal capsule cause?

Answer 12

1. pure sensory
2. pure motor

Question 13

arterial supply to spinal cord

Answer 13

anterior spinal artery (anterior 2/3)
posterior spinal artery (posterior 1/3)

artery of adamkiewicz (tributary to lower SC)

Question 14

supplementary supply to anterior spinal artery

Answer 14

intercostal and lumbar arteries (hairpin loops)

Question 15

blockage of anterior spinal artery would cause what signs?

Answer 15

bilateral loss of spinothalamic tract modalities below lesion

bilateral upper motor neurone symptoms below lesion as corticospinal tract affected

Question 16

blockage of posterior spinal artery would cause what signs?

Answer 16

ipsilateral loss of dorsal column modalities below lesion

Question 17

AAA. repair can cause lower limb weakness. why, and how can it be avoided?

Answer 17

depriving spinal cord blood supply
ensure to reenastomose intercostal and lumbar arteries

Question 18

grey matter distribution of lenticulostriate arteries

Answer 18

lentiform nucleus, caudate, internal capsule

Question 19

which somatosensory pathways are included in region supplied by anterior cerebral artery?

Answer 19

spinothalamic tracts

corticospinal tracts

Question 20

which somatosensory pathways are included in region supplied by posterior cerebral artery?

Answer 20

dorsal column