Cerebrovascular Anatomy Flashcards
Anterior Cerebral Artery
supplies medial surface of frontal lobe, parietal lobes, and anterior 4/5 of corpus callosum frontal, prefrontal, supplementary motor cortex, as well as parts of the primary motor and primary sensory cortex
Middle cerebral artery (MCA)
supplies the lateral surface of cerebral hemisphere, except the superior part of the frontal and parietal lobe, and inferior part of temporal lobes supplies lateral aspect of frontal, parietal, and temporal lobes and basal ganglia MCA occlusion occur: superficial and deep (lateral lenticulostriate) when superficial divisions obstructed: - major motor and somatosensory deficits from face and arm - confluent (broca’s) aphasia - fluent (wernicke’s) aphasia
posterior cerebral artery
supplies occipital lobes, inferior part of the temporal lobes, upper midbrain and cerebellum
occlusion of ACA causes
restricted contralateral motor and somatosensory deficits of the lower extremity (due to somatotropin arrangement)
MCA deep branches (perforating arteries)
lateral lenticulostriate arteries
lateral lenticulostriate arteries supplies and obstruction
supplies more superior portions of inertial capsule, and basal ganglia (caudate, putamen, globes pallidus) obstruction of deep branches of MCA: - contralateral hemiparesis and hemisensory loss affecting face, upper limb and lower limp (lesser) due to damage to basal ganglia
anterior perforating arteries
anterior cerebral artery anterior communicating artery middle cerebral artery
anterior perforating arteries supply
large of basal ganglia optic chiasma internal capsule hypothalamus
posterior perforating arteries
posterior cerebral artery posterior communicating artery
posterior perforating arteries supply
ventral portion of midbrain parts of sub thalamus and hypothalamus
perforating arteries
lenticulostriates thalmoperforators
lenticulostriates
medial and lateral enter anterior perforated substance of brain to supply basal ganglia and internal capsule thalmoperforators supply thalamus
Majority of basal ganglia are supplied by
MCA perforators
vertebral arteries branches
anterior spinal artery posterior spinal artery posterior inferior cerebellar artery (PICA)
Basilar artery branches
anterior inferior cerebellar artery (AICA). anastomose with PICA labyrinthine artery (inner ear) pontine branches superior cerebellar artery (SCA)
PCA supplies and an occlusion results in
supplies the occipital lobe, the inferior part of the temporal lobe, and deep structures like thalamus and internal capsule
Occlusion of PCA result in:
- Contralateral hemianopia due to damage to visual cortex in the occipital lobe
- Contralateral hemiparesis and hemisensory loss due to disruption of the ascending and descending information passing through these structures
superficial veins
vein of trolard (largest, drain into superior sagittal sinus)
vein of Labbe (drain into transverse sinus)
Deep veins
Thalamostriate veins
internal cerebral veins
great cerebral vein (of galen)
superficial middle cerebral vein drain into
cavernous sinus
superior anastomotic vein (of trolard) connects
superficial middle cerebral vein with superior sagittal sinus
inferior anastomotic vein (of labbe) connects the s
superficial middle cererbral vein with transverse sinus
arterial supply of spine
anterior and posterior spinal arteries
branches of segmental arteries
region more vulnerable to ischemia
thoracic and lumbar segments have fewer (2-4) arteries
artery of adamkiewicz
large anterior radicular artery at the level of T12-L2, major source of blood to the lower thoracic and upper lumbar cord and must be preserved during surgery in the area.
