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My Own Neuro > Blood supply of the CNS > Flashcards

Blood supply of the CNS Flashcards

1
Q

Brain recieves this amount of cardiac output

A

15%

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2
Q

Amount of oxygen consumed by brain daily

A

25%

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3
Q

Brain cannot withstand

A

Lack of oxygen/anoxia

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4
Q

How many arteries supply the brain

A
  1. Broken down into 2 pairs
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5
Q

Vessels of the brain lie in this region

A

Subarachnoid space

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6
Q

What arteries supply the brain

A

A pair of internal carotid arteries

A pair of vertebral arteries

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7
Q

Pair of vertebral arteries fuse to form the

A

Basilar arteries

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8
Q

The internal carotid arteries supplies this part of the brain

A

Forebrain, except the occipital lobe

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9
Q

The vertebral arteries supply this part of the brain

A

The occipital lobe
Brainstem
Cerebellum
Spinal cord

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10
Q

Spinal cord receives from these areteries

A

Vertebral arteries

Spinal segmental arteries

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11
Q

Where does internal carotid originate from

A

Bifurcation of common carotid artery

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12
Q

Course of internal carotid artery

A

Passes through neck - cervical part
enters cranium via carotid canal- petrous part
enters carvenous sinus - carvenous part
Becomes cerebral part where it divides into 5 terminal branches

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13
Q

Branches of internal carotid

A 
Ophthalmic artery
Posterior communicating artery
Anterior choroidal artery
Anterior cerebral artery
Anterior communicating artery
Middle cerebral artery
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14
Q

Where does vertebral artery arise from

A

Subclavian artery

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15
Q

Course of vertebral artery

A

Arises from subclavian
Passes through vertebral foramina
Enters the cranium via foramen magnum
Joins contralateral vertebral artery to form basilar artery

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16
Q

Branches of vertebral artery

A

Anterior spinal artery
Posterior spinal artery
Posterior inferior cerebellar artery
Basilar artery

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17
Q

At which point does basilar artery bifurcate

A

Midbrain

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18
Q

Basilar artery proceeds in this direction

A

Rostrally

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19
Q

Basilar artery bifurcates into

A

2 posterior cerebellar areries

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20
Q

Internal carotid and its branches form

A

Anterior circulation

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21
Q

Basilar artery and its branches form

A

Posterior circulation

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22
Q

Branches of basilar artery

A 
Labyrinthine
posterior cerebral artery
Anterior inferior cerebellar artery
Superior cerebellar artery
Pontine arteries
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23
Q

Where is basilar artery found

A

Ventral surface of the pons, in the basilar groove.

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24
Q

What is the circle of willis

A

Arterial anastomosis between internal carotid artery and vertebrobasilar systems

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25
Q

Location of the circle of willis

A

interpeduncular fossa at base of the brain

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26
Q

Branches of circle of willis

A

Anterior cerebral artery

Middle cerebral artery

27
Q

Blood flow around circle of willis

A

Little to no blood flow

28
Q

Importance of circle of willis

A

Acts to provide collateral blood flow /anastomotic flow between anterior and posterior circulations of the brain protecting it against ischemic damage in an event of vessel damage in one or more areas

29
Q

Danger of circle of willis

A

Common area of arterial malformations/ aneurysms

30
Q

Occlusion in the cortical branch of middle cerebral artery causes

A

Major motor and somatosensory deficits

31
Q

Occlusion of anterior cerebral artery

A

Affects the paracentral lobule i.e leg and perineum

32
Q

Occlusion in posterior cerebral artery affects

A

primary visual cortex

33
Q

Corpus striatum and internal capsule supplied by

A

Medial and lateral striate of MCA
Recurrent branch of ACA
Anterior choroidal

34
Q

Thallamus supplied by

A

central branches of PCA

Posterior communicating artery

35
Q

Optic chiasma supplied by

A

ACA

36
Q

Optic tract supplied by

A

Anterior choroidal artery

posterior cerebral artery

37
Q

Optic radiation supplied by

A

MCA

PCA

38
Q

Cerebellum supplied by

A

PICA
AICA
SCA

39
Q

Pons supplied by

A

AICA
SCA
Basilar
Pontine

40
Q

Midbrain supplied by

A 
PCA
SCA
Basilar
Posterior communicating
Anterior choroidal
41
Q

Medulla supplied by

A

PICA
vertebral
anterior spinal
posterior spinal

42
Q

Venous drainage of brain

A

System of cerebral veins—.>dural venous sinuses….>Internal jugular vein

43
Q

Emissary veins connect

A

extracranial veins with dural sinuses

44
Q

The basilar venous plexus location

A

base of brain

45
Q

Basilar venous plexus communicates with

A

epidural venous plexus of spinal cord

46
Q

2 types of cerebral veins are

A

Superficial

Deep

47
Q

Superficial veins

A

Lie on the surface of cerebral hemispheres

48
Q

Superficial veins drain into

A

superior sagittal sinus

49
Q

Deep veins

A

Drain internal structures into the straight sinus

50
Q

Longitudinal vessels that supply spinal cord

A

single anterior spinal artery

pair of posterior spinal artery

51
Q

Segmental arteries that supply spinal cord

A

spinal branches of vertebral, deep cervical, intercostal, lumbar arteries

52
Q

Anterior spinal cord location

A

Anterior median fissure

53
Q

Posterior spinal artery location

A

posterolateral sulcus

54
Q

Where does anterior spinal artery supply

A

upper cervical levels with supplement from vertebral arteries

55
Q

Anterior spinal artery supplies

A

Anterior 2/3rd of spinal cord
Base of posterior horn
Variable portion of lateral corticospinal tract

56
Q

Posterior spinal arteries are

A

plexiform network of small arteries

57
Q

Function of posterior spinal arteries

A

supply posterior columns, substantia gelatinosa, dorsal root entry zone, a portion of lateral corticospinal tract

58
Q

Below the lower cervical segments spinal cord depends on this for survival

A

radicular arteries

59
Q

The great radicular artery present at which level

A

T9-L2

60
Q

Main supply to lower 2/3rds of the cord

A

Great radicular

61
Q

Spinal cord does not rely solely on longitudinal arteries because they are

A

end arteries. Input of segmental arteries esp artery of Adamkiewicz

62
Q

Venous drainage occurs along

A

6 places

Anterior and posterior midlines
line of attachment of dorsal and ventral roots on each side

63
Q

Veins in spinal cord are drained by

A

Radicular veins which empty into epidural venous plexus

My Own Neuro (8 decks)

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