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48 Cards in this Set

  • Front
  • Back
TOTAL blood supply to brain occurs via
1 internal carotid
2 vertebral arteries
branches of internal carotid
1 middle cerebral a (MCA)
2 anterior cerebral a (ACA)
3 posterior communicating a (PCA)
4 ophthalmic a
5 choroidal a
astrocyte
cells that make contact with blood vessels and allow something to pass into brain and
MCA supply
- lateral surface
- deep structure of each hemisphere
ACA supply
medial surface of cerebral cortex (anterior and superior)
PCA connect with
connect MCA and ACA with posterior cerebral artery
ophthalmic a supply
eye, orbital structure, frontal area of scalp and sinuses
choroidal a supply
choroid plexus of lateral ventricles
what type of artery associated with migraine
external carotid artery
branches of vertebral artery
- posterior inferior cerebellar a (PICA) - largest
- meningeal a.
- posterior spinal a.
- anterior spinal a.
vertebral artery branch of from
subclavian artery
PICA supple
central and posterior cerebellum and part of medulla
meningeal a
supply bone and dura mater(easily damage from head injury)
posterior spinal a
supply posterior spinal cord
anterior spinal a
supply anterior spinal cord
branch basilar artery
1 pontine a
2 labyrinthe a
3. anterior inferior cerebellar (AICA)
4 superior cerebellar
5 posterior cerebral
pontine a
supply pons
labyrinthine a
supply inner ear
AICA
supply anterior and inferior cerebellum
superior cerebellar a
supply superior surface of crebellum
posterior cerebral a
supply inferior and medial tempral and occipital lobes, striatum , thalamus, midbrain
circle of willis component
* Anterior cerebral artery (left and right)
* Anterior communicating artery
* Internal carotid artery (left and right)
* Posterior cerebral artery (left and right)
* Posterior communicating artery (left and right)
- basilar arteries
circle of willis communicate via
anastomoses (arterialjunction) of two internal carotid a. , basiar a., and their branches
importance of circle of willis
allow blood that enter by with internal carotid or vertebral a. to be distributed to any part of both cerebral h.
(when occlideoccur on one side, bloodmay pass to opp. side to compensate)
most common site of aneurysms (dilatation of a blood vessel)
anastomoses on circle of willis
function of veins and venous sinus
return blood from brain to jugular vien -->heart
SINUS
- superior sagittal sinus
- inferior sagittal sinus
-straight sinus
- transverse sinus
- cavernous sinus
VEIN
external cerebral veins
great cerebral vein
external cerebral veins
- drain lateral surafce of brain
- empty into superior sagittal and cavernous sinuses
great cerebral vein
- drain smaller internal ceins
- empty into straight sinuses
acute disruption of normal blood circulation in brain
stroke or cerebrovascular accident (CVA)
types of CVA involve
1 hemorrphage (bleeding) 2 obstruction of artery
location of intracranial hemorrphage
- subdural
0 subarachnoid
- extradural
cause of subdural hemorrphafw
tearing of superior cerebral veins at the point of entrance into superior sagittal sinus ( cause by bloe to front/back of heard)
cause of subarachnoid hemorrphage
leakage of congenital aneurysm
most dangerous hemorrphage
subarachnoid hemorrphage
cause of extradural hemoorphage
skull fracture causing tearing of meningeal a. and viens ..most often middle meningeal a.**

minor blow to side of head which fractur parietal bone and severe artery
cerebral hemorrphae due to
rupture of branch MCA (middle cerebral a.)
result of cerebral hemorrphage
involve internal capsule, produce ontralateral hemiplegia and loos of consciousness
cereal ischemia
arterial occlusion usually by embolism (forign object - air, blood, clot, fat) in circulatory system outside of brain
thrombosis
arterial obstruction by blood clot ,involve vessles leafing to or inside brain
cerebral ischmiacause arrest of cerebral blood flow and follow by
1 neuronal dunction ceases after about 1 min, irreversible changes after 4 mins
2. hearing loss due to lack of bloodflow
most common cause of global cerebral ischemia
cardiac arret fur to coronary thrombosis
progressive cerebral ischemia is due to
narrow of arteries or tmor expansion
loval dilation of vessel result from weaking of arterial wall
cerebral aneurysm
cerebral aneyrysm effecrt
1 press on neighboring structure (cranial nerve)
2 sudden rupture of aneurysm dill subarachnois --> pain and mental confusion/ death
progressive harding / thickening of arterial waa
arteriosclerosis
stage of arterioscleosis characterize by fatty dengeration of arterial walls m risk of hemorrphae
atherosclerosis