4.2 Blood supply Flashcards
shape of aneurysms in CoW
berry
kidney disease with strong link to berry aneurysms in CoW
polycystic kidney disease
aneurysm is posterior communicating artery could lead to what signs?
ipsilateral CN3 palsy, due to running parallel
course of anterior cerebral artery
branch of ICA, loops back over superior surface of corpus callosum
branches to medial aspects of cerebral hemispheres mainly frontal and parietal lobes
white matter distribution of anterior cerebral artery
corpus callosum
sub falcine herniation
medial mass effect from frontal/oarietal/temporal lobe pushing cingulate gyrus under flax cerebra, can compress anterior cerebral artery causing stroke syndrome
subcortical distribution of posterior cerebral arteries
branches to midbrain
branches to thalamus (perforate and ascend)
course of posterior cerebral artery
bifurcation of basilar, loops round midbrain then along inferior surface of posterior hemisphere
supplies occipital lobe and inferior temporal lobe
what sort of signs would a posterior cerebral artery aneurysm cause?
sensory and visual due to occipital lobe and visual cortex involvement
lacunar infarct
occlusion of lenticulostriate arteries
where do the lenticulostriate arteries arise from?
perforating branches of middle cerebral artery
what type of stroke would a lacunar infarct in 1. thalamus, 2. internal capsule cause?
- pure sensory
- pure motor
arterial supply to spinal cord
anterior spinal artery (anterior 2/3)
posterior spinal artery (posterior 1/3)
artery of adamkiewicz (tributary to lower SC)
supplementary supply to anterior spinal artery
intercostal and lumbar arteries (hairpin loops)
blockage of anterior spinal artery would cause what signs?
bilateral loss of spinothalamic tract modalities below lesion
bilateral upper motor neurone symptoms below lesion as corticospinal tract affected
blockage of posterior spinal artery would cause what signs?
ipsilateral loss of dorsal column modalities below lesion
AAA. repair can cause lower limb weakness. why, and how can it be avoided?
depriving spinal cord blood supply
ensure to reenastomose intercostal and lumbar arteries
grey matter distribution of lenticulostriate arteries
lentiform nucleus, caudate, internal capsule
which somatosensory pathways are included in region supplied by anterior cerebral artery?
spinothalamic tracts
corticospinal tracts
which somatosensory pathways are included in region supplied by posterior cerebral artery?
dorsal column
