Neuro Blood Supply

two main artery supplies of brain

internal carotid (80%)

vertebral artery (20%)

internal carotid artery

1. ophthalmic artery

2. anterior choroidal artery

3. posterior communicating artery

4. anterior cerebral artery

   1. anterior communicating

   2. medial striate

5. middle cerebral artery

   1. lateral striate (lenticulostriate artery)

ophthalmic artery

eyeball and orbit

anterior choroidal artery

optic tract

choroid plexus of inferior horn of lateral ventricle

ventromedial portion of temporal lobe

globus pallidus

thalamus

ventral portion of internal capsule

posterior communicating artery

anastomose with posterior cerebral artery

branch point from internal carotid is common site for aneurysms

anterior cerebral artery

terminal branch of internal carotid

superior surface of corpus callosum

anterior ¾ of cerebral hemisphere

medial and orbital surface of frontal lobe

medial surface of parietal lobe

dorsomedial portion of primary motor and somatosensory cortices

anterior communicating artery

joins left and right anterior cerebral arteries at midline

medial striate artery

basal ganglia

internal capsule

middle cerebral artery

lateral surface of cerebral hemisphere

primary motor areas, somatosensory areas, premotor cortex

frontal eye field, primary auditory cortex

broca’s and wernicke’s

parietal association cortices

optic radiations

lateral striate artery

lateral striate artery

diencephalon and telencephalon

striatum

anterior and posterior limbs of internal capsule

damage can cause neurological deficits disproportionate to their size

vertebral artery

posterior inferior cerebellar artery (PICA)

posterior spinal artery

anterior spinal artery

posterior inferior cerebellar artery

posterior and inferior aspects of the cerebellum

choroid plexus of the 4th ventricle

dorsolateral medulla

posterior spinal artery

dorsal horns and dorsal funiculi

anterior spinal artery

anterior 2/3 of spinal cord

blood flow is reinforced by radicular arteries

basilar artery branches

anterior inferior cerebellar artery (AICA)

labyrinthine (internal acoustic) artery

pontine arteries

superior cerebellar artery (SCA)

posterior cerebral artery (PCA)

anterior inferior cerebellar artery (AICA)

lateral caudal pons

anterior and inferior aspects of cerebellum

• flocculus and middle cerebellar peduncle

labyrinthine internal acoustic artery

inner ear

occlusion causes vertigo and ipsilateral deafness

pontine arteries

small branches of basilar artery

pons

superior cerebellar artery (SCA)

lateral rostral pons and caudal midbrain

superior aspect of cerebellum

• vermis, deep cerebellar nuclei, most of cerebellar white matter

posterior cerebral artery

rostral midbrain

caudal diencephalon

medial and inferior surfaces of temporal and occipital lobes

• calcarine artery

  • primary visual cortex

  • occlusion of vessel causes homonymous hemianopsia with macular sparing

what saves blood flor if a portion of circle of willis is occluded

anastomoses

caudal medulla arteries from back to front

PICA/PSA

ASA/VA

ASA

rostral medulla arteries from back to front

PICA

PICA/VSA

ASA/VA

caudal pons arteries from back to front

BA/AICA

BA

rostral pons arteries back to front

BA/SCA

BA

caudal midbrain arteries back to front

SCA/PCA

SCA/BA

rostral midbrain arteries back to front

PCA

PoCoA/ Anterior choroidal arteries