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anatomy block 4 > CNS vasc > Flashcards

CNS vasc Flashcards

1
Q
A
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2
Q

Prior to terminating, however, each ICA gives off a .

A

posterior communicating artery

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3
Q

posterior communicating arteries project posteriorly to communicate with the

A

posterior cerebral artery (PCA).

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4
Q

two ant cerebral art are connected by an anastomosing branch called the

A

anterior communicating artery.

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5
Q

not part of circle of willis

A

middle cerebral artery

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6
Q

hip and down provided by

A

Anterior cerebral artery (ACA)

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7
Q

middle cerebral artery

A

supply rest of body other than LE

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8
Q
A
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9
Q

lenticulostriate arteries

A

given off by middle cerebral arteries as they course lateral

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10
Q

frequent site of stroke

A

lenticulostriate arteries

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11
Q

internal capsule and deep gray matter

A

lenticulostriate arteries

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12
Q

formed by tight junctions between the endothelial cells lining CNS capillaries

A

Blood Brain Barrier

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13
Q

limit the flow of substances from capillaries into the CNS

A

tight junctions of Blood brain barrier

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14
Q

hydrophilic substances such as amino acids and glucose and medications

A

cant cross bbb alone

need carrier

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15
Q

Lipid soluble molecules, such as ethanol, nicotine and caffeine

A

cross the BBB,

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16
Q

Intermediate meningeal layer

A

Arachnoid

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17
Q

Conforms to shape of brain …

does not dip into sulci

Delicate membrane

A

Arachnoid

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18
Q

Pia mater

A

Adheres to the brain, following all of its contours

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19
Q

Dura mater

A

External Periosteal Layer

Internal Meningeal Layer

20
Q

Internal Meningeal Layer of dura mater

A

Dense fibrous connective tissue

21
Q

External Periosteal Layer

A

Formed by the periosteum which adheres to the internal surface of skull

22
Q

two largest dural reflections are

A

Falx cerebri

©Tentorium cerebelli

23
Q

invaginates along the longitudinal fissure, between the two cerebral hemispheres

A

Falx cerebri

24
Q

positioned between the occipital and temporal lobes - and- cerebellum

A

Tentorium cerebelli:

27
Q

dural venous sinuses

A

Dural reflections

receive deoxygenated blood

28
Q

conveys deoxygenated blood from cerebral veins to the internal jugular vein

A

dural venous sinus system

29
Q

arrange

venous sinuses –> cerebral arteries capillaries –>internal jugular vein–> cerebral veins

A

cerebral arteries capillaries –> cerebral veins –> venous sinuses –> internal jugular vein

30
Q

diff b/n Cerebral veins and dural venous sinuses

A

typical venous histology vs. dural spaces lined with endothelial cells

31
Q

Potential space between cranium & periosteal layer of dura

A

Epidural space

32
Q

Epidural hemorrhage/ hematoma

A

Most frequently occurs with trauma/skull fracture

33
Q

Epidural hemorrhage/ hematoma

A

Laceration/ tearing of the meningeal artery and

Bleeding into the potential space between the cranium and periosteal layer of dura

34
Q

the periosteal dura encloses the

A

meningeal vessels.

35
Q

subdural space

A

Potential space between the dura and arachnoid

36
Q

Subdural Hemorrhage/ Hematoma

A

secondary to rapid acceleration/deceleration which pulls the brain away from the skull

37
Q

tears cerebral veins as they enter the dural sinus

A

Subdural Hemorrhage/ Hematoma

38
Q

subarachnoid space

A

true space that contains blood vessels and CSF

39
Q

Interventricular Foramen (Foramen of Monroe)

A

communicates Lateral Ventricles (2) Right Left

to 3rd ventricle

40
Q

communication between 3rd and 4th ventricle

A

Cerebral Aqueduct (Aqueduct of Sylvius)

41
Q

Subarachnoid Hemorrhage/ Hematoma

A

arterial hemorrhage

42
Q

Subarachnoid Hemorrhage/ Hematoma

A

~70% are 2° aneurysm

45
Q

Foramen of Magendie

A

Midline opening in the 4th ventricle

46
Q

Foramen of Luschka

A

Paired openings in the 4th ventricle

47
Q

CSF is made in the —— ——-, it circulates through the ——— and exits the —- ventricle

A

CSF is made in the choroid plexus, it circulates through the ventricles and exits the 4th ventricle

48
Q

As CSF leaves the 4th ventricle, it enters the

A

subarachnoid space.

49
Q

CSF travel to subarachnoid space into the dural venous sinuses

A

via arachnoid granulations

50
Q
A

anatomy block 4 (16 decks)

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