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Neuroanatomy > BLOOD SUPPLY CORTEX - MODULE > Flashcards

BLOOD SUPPLY CORTEX - MODULE Flashcards

1
Q

The brainstem is supplied with blood by a network of arteries collectively called the…

A

vertebral-basilar system

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2
Q

The vertebral-basilar system arises from ____ which branch off from the _____

A

vertebral arteries

subclavian arteries

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3
Q

The cortex and deep structures are supplied with blood from the anterior arterial system which arises from the

A

internal carotid arteries

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4
Q

The anterior system anastomoses with the posterior vertebral-basilar system at the ____

A

circle of willis

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5
Q

The circle of willis creates

A

collateral flow

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6
Q

only ___% of individuals desplay a complete circle of willis

A

34%

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7
Q

The basilar artery bifurcates to form the

A

posterior cerebral artery

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8
Q

The internal carotide arteries supply the ____ and _____ arteries

A

middle cerebral and anterior cerebral arteries

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9
Q

The posterior cerebral arteries curve around the ____ on their way to the cortex

A

midbrain

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10
Q

The posterior cerebral arteries supplies the…

A
  • Medial surface of the occipital and temporal lobes
  • Inferior and medial parts of the temporal lobe
  • Portions of the lateral temporal and occipital lobes
  • Thalamus
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11
Q

The middle cerebral artery is the direct branch from the ______

A

internal carotid artery

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12
Q

The MCA curves to enter the ____, where it then divides into multiple end branches

A

lateral fissure

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13
Q

Where do the divisions of the MCA travel

A

they form loops as they travel over the insula and thene xit the lateral fissure and pass onto the lateral surface of the cortex

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14
Q

What does the superior division of the MCA supply

A

portions of the frontal and parietal cortex located above the fissure

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15
Q

What does the inferior division of the MCA supply

A

the temporal and parietal cortex located below the fissure

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16
Q

What are lenticulostriate arteries

A

Deep branches of the MCA, as well as some additional branches of the ACA

17
Q

What do lenticulostriate arteries supply

A

regions of the basal ganglia and internal capsule

18
Q

The two anterior cerebral arteries anastomose anteriorly at the _____

A

anterior communicating artery

19
Q

What does the anterior cerebral artery supply

A
  • most of the cortex on the medial surface of the frontal and parietal lobes and the
  • cortex on the inferior surface of the frontal lobe
  • 1-2 cm of the cortex on the lateral surface of the frontal and parietal lobes
20
Q

What do the end branches of the ACA supply

A

1-2 cm of the cortex on the lateral surface of the frontal and parietal lobes

21
Q

The ACA passes anteriorly to enter the longitudinal fissure and then swings posterior to travel along…

A

the superior surface of the corpus callosum

22
Q

The ACA generally bifurcates into two main branches on the ____ surface of the brain

A

medial

23
Q

What are the anterior choroidal arteries branches of

A

the internal carotid artery

24
Q

The anterior choroidal arteries travel to the ______ in which part of the brain?

A

Choroid plexus in the lateral ventricle

25
Q

What is the perfusion territory of the anterior choroidal arteries

A
  • Globus pallidus
  • Putamen
  • Tail of the caudate nucleus
  • Posterior limb of the internal capsule
  • Hippocampus
  • Inferior horn of lateral ventricle
26
Q

Why is the anterior choroidal artery vulnerable to increases in blood pressure? what is the effect of this?

A

It is small in diameter, but branches off of the high-pressure internal carotid artery. This can lead to bursting of the small arterial walls, and hemorrhagic stroke

27
Q

What is a watershed area

A

the area where two perfusion territories come together

28
Q

When are watershed areas vulnerable

A
  • severe drops in systemic blood pressure

- Partial occlusion of a major blood vessel

29
Q

The basal ganglia receives blood supply from which vessels

A
  • ACA
  • MCA
  • PCA
  • Anterior choroidal

Neuroanatomy (23 decks)

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