lab 2 cerebrovasculature Flashcards
posterior circulation is taken care of by which system?
vertebral basilar system
vertebral basilar system comprises:
vertebral, anterior spinal, posterior inferior cerebellar, anterior inferior cerebellar, and superior cerebellar arteries (VAsPiAiS)
how do the vertebral arteries enter the cranium
THE BIG HOLE (foramen magnum) where spinal cord and medulla pass through
the internal carotoid system is responsible for
anterior circulation
vertebral arteries are closest to which brain structure?
medulla
the anterior spinal arteries carry blood to
the spinal cord
the posterior inferior cerebellar arteries carry blood to (PICA)
to dorsolateral medulla, choroid plexus(4th ventricle) posterior/inferior cerebellum
The anterior spinal arteries join the PICA and the vetrebral arteries to make the
Basilar artery
The AICA supplies blood to the
upper medulla/lower pons and inferior cerebellum
blood to the superior cerebellum and upper pons comes from the
superior cerebellar arteries
posterior cerebral arteries give blood to
medial/inferior temporal lobes; occipital lobes; thalamus)
what is an aneurysm
weakening of muscles surrounding arteries. (stress increases blood pressure, which rubs against the thin portions of the wall. Outward swelling may rupture.
the most common type of aneurysm is:
Saccular aneurysm. a budding at the y of artery intersections. Caused by subarachnoid hemmorhages , found using MRI/CT scans
what is a thrombus
a blood clot
what is the difference between a hemorrhagic stroke and an ischemic stroke?
hemorrhagic: caused by a tear in an artery (bleeding)
ischemic: caused by a block in an artery
embolism is:
dislodged blood clot that travels thru vessels to get lodged in an artery
anastomoses are
cross connections of adjacent blodd vessels; causes overlap in vascular territories
the middle cerebral arteries provide blood to :
lateral parts of ctx; parietal and temporal lobes
the posterior cerebral arteries provide blood to:
midbrain/thalamus, parts of temporal lobe
the PICA gives blood to
the inf occipital and if cerebellum
Superior cerebellar arteries give blood to
superioir/tentorial parts of cerebellum
anterior cerebral artery gives blood to
medial parts of frontal/parietal lobes, BG, internal capsule, CC
which artery runs along the corpus callosum (visible from a midsaggital cut)
anterior cerebral a
the internal carotids are known as what outside of the circle of willis
middle cerebral aa
the most common type of anneurism is:
saccular; it is found in the y’s of arteries and when it ruptures causes subarachnoid hemmorhages. MRI’s and CT’s are the best way to diagnose.
`the largest arteries in the brain which are most affected by heart clots are:
middle cerebral arteries
the lateral surfaces of the brain are mostly supplied by
middle cerebral arteries
the medial surfaces of the brain are mostly supplied by
the anterior cerebral arteries
