lab 2 cerebrovasculature Flashcards

1
Q

posterior circulation is taken care of by which system?

A

vertebral basilar system

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2
Q

vertebral basilar system comprises:

A

vertebral, anterior spinal, posterior inferior cerebellar, anterior inferior cerebellar, and superior cerebellar arteries (VAsPiAiS)

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3
Q

how do the vertebral arteries enter the cranium

A

THE BIG HOLE (foramen magnum) where spinal cord and medulla pass through

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4
Q

the internal carotoid system is responsible for

A

anterior circulation

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5
Q

vertebral arteries are closest to which brain structure?

A

medulla

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6
Q

the anterior spinal arteries carry blood to

A

the spinal cord

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7
Q

the posterior inferior cerebellar arteries carry blood to (PICA)

A

to dorsolateral medulla, choroid plexus(4th ventricle) posterior/inferior cerebellum

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8
Q

The anterior spinal arteries join the PICA and the vetrebral arteries to make the

A

Basilar artery

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9
Q

The AICA supplies blood to the

A

upper medulla/lower pons and inferior cerebellum

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10
Q

blood to the superior cerebellum and upper pons comes from the

A

superior cerebellar arteries

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11
Q

posterior cerebral arteries give blood to

A

medial/inferior temporal lobes; occipital lobes; thalamus)

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12
Q

what is an aneurysm

A

weakening of muscles surrounding arteries. (stress increases blood pressure, which rubs against the thin portions of the wall. Outward swelling may rupture.

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13
Q

the most common type of aneurysm is:

A

Saccular aneurysm. a budding at the y of artery intersections. Caused by subarachnoid hemmorhages , found using MRI/CT scans

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14
Q

what is a thrombus

A

a blood clot

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15
Q

what is the difference between a hemorrhagic stroke and an ischemic stroke?

A

hemorrhagic: caused by a tear in an artery (bleeding)
ischemic: caused by a block in an artery

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16
Q

embolism is:

A

dislodged blood clot that travels thru vessels to get lodged in an artery

17
Q

anastomoses are

A

cross connections of adjacent blodd vessels; causes overlap in vascular territories

18
Q

the middle cerebral arteries provide blood to :

A

lateral parts of ctx; parietal and temporal lobes

19
Q

the posterior cerebral arteries provide blood to:

A

midbrain/thalamus, parts of temporal lobe

20
Q

the PICA gives blood to

A

the inf occipital and if cerebellum

21
Q

Superior cerebellar arteries give blood to

A

superioir/tentorial parts of cerebellum

22
Q

anterior cerebral artery gives blood to

A

medial parts of frontal/parietal lobes, BG, internal capsule, CC

23
Q

which artery runs along the corpus callosum (visible from a midsaggital cut)

A

anterior cerebral a

24
Q

the internal carotids are known as what outside of the circle of willis

A

middle cerebral aa

25
Q

the most common type of anneurism is:

A

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.

26
Q

`the largest arteries in the brain which are most affected by heart clots are:

A

middle cerebral arteries

27
Q

the lateral surfaces of the brain are mostly supplied by

A

middle cerebral arteries

28
Q

the medial surfaces of the brain are mostly supplied by

A

the anterior cerebral arteries