Chapter 7: Ventricles, Choroid Plexus, Meinigies, etc. & CerebroVascular System (2/7)

Question 1

Vasculature: Aneurysm

Answer 1

dilation of blood vessel. 85% found in internal carotid system at branch point.

Question 2

Vasculature: Embolism

Answer 2

Occlusion of cerebral artery (clot, bacteria, plaque, etc.) can lead to ischemia and inaraction

Question 3

Vasculature: Arteriovenous malformations

Answer 3

Developmental dysregulation of formation of communication between major arteries and veins

Question 4

Type of stroke: Ischemic

Answer 4

Thrombus/embolus blocks blood flow to part of the brain

Question 5

Type of stroke: hemorrhagic

Answer 5

blood spills out from break in blood vessel in brain

Question 6

List the major arteries to the brain

Answer 6

internal carotid (and vertebral arteries, which joined for basiler artery) provide major blood supply

Question 7

Where does basiler artery project to?

Answer 7

posterior cerebral

Question 8

Is gray or white matter more vascularized?

Answer 8

Grey matter

Question 9

Highest density of arterioles is

Answer 9

in regions with larger # neurons and synapses

Question 10

How long oxygen deprived before permanent damage?

Answer 10

5 minutes

Question 11

internal carotid enters dura near _____._.

Answer 11

optic chiasm

Question 12

Branches of Internal Carotid:

Opthalamic Artery

Answer 12

central artery of retina, important blood supply to retina, compromise can result in visual loss

Question 13

Branches of Internal Carotid:

Anterior Choroidal

Answer 13

Blood supply to choroid plexus of lateral ventricles

Question 14

Branches of Internal Carotid:

Anterior Cerebral Artery

Answer 14

joined via anterior communicating artery, where 30-35% of intracranial aneurysms are found. Visual deficits due to proximity to optic chiasm.

Supplies blood to optic chiasm and hypothalamus, medical surface of frontal/parietal lobes, along with lower extremities of anterior (motor) and posterior (somatosensory) of the paracentral gyrus.

Question 15

Branches of Internal Carotid:

Middle Cerebral Artery

Answer 15

M1 serves temporal lobe: lenticulostriate arteries. Superior (dorsal) and inferior (ventral) truncks of MCA0 insular cortex, lateral surface hemisphere. Post/pre/temporal gyri, parietal lobe.

Lenticulostriate arteries: supply internal structures

Question 16

Branches of Internal Carotid:

Posterior Cerebral Artery

Answer 16

Caudal areas and midbrain/diencephalon/posterior cerebral cortex.

Calcarine Artery: primary visual cortex

Question 17

Vertebral Artery

Answer 17

Medulla, some cerebellum, posterior dura

Question 18

Basilar artery

Answer 18

Ventral/lateral cerebellum, pons, choroid plexus of 4th ventricle

Question 19

Veins and sinuses

Answer 19

Venous blood from deep and superficial veins enters dural sinuses which empty to internal jugular vein.

Question 20

Superior (dorsal) and interior sagittal sinus

Answer 20

Attach to free edges of falx cerebri

Question 21

Straigth sinus

Answer 21

Where tentorium cerebelli meets falx cerebri.