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cerebrovascular (arterial supply (vertebral artery (location: enter skull…
cerebrovascular
arterial supply
internal carotid artery
location: enter skull through carotid canal
category: anterior & middle cerebral arteries
vertebral artery
location: enter skull through foramen magnum
category: basilar artery & posterior cerebral arteries
function place: temporal lobe, brainstem, cerebellum, occipital lobe, some of thalamus
cerebral arterial circle ( Circle of Willis)
formation: posterior cerebral artery, posterior communicating artery, internal carotid artery, anterior cerebral artery, anterior communicating artery
function:
equalize blood pressure in brain
provide detour/bypass routes if vessel is blocked
clinical view
cerebrovascular accident (stroke)
causing: blood supply to the brain is blocked, resulting in tissue death
symptom
middle cerebral artery (most common):
motor deficits -- hands, arms
visual
speech
unconsciousness
anterior cerebral artery:
frontal lobes controlling logical thought & personalities
motor deficits in legs
posterior cerebral artery:
temporal, occipital, brainstem, cerebellum
include thalamic syndrome: color blindness, failure to track movements visually, verbal deficits, hallucinations, visual defects
venous drainage
no venous equivalent to circle of willis
drains into sinuses