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Jason's Neuro Block > CNS Blood Flow > Flashcards

Flashcards in CNS Blood Flow Deck (26):
1

CNS uses how much% of CO?

10-20%

2

if arterial blood flow changes, how does it affect CNS?

autoregulation system keeps the brain adequately perfused

3

How is perfusion maintained in brain?

via dense network of vessels

4

circle of Willis is formed by what two systems?

Internal Carotid
vertebro-basilar system

5

vertebral artery comes off? goes through where?

off subclavian, through first 6 transverse foramina>foramen magnum

6

ACA supplies what?

medial part of frontal and parietal lobes

7

ACA supplies what functional territories?

motor and sensory for lower limb

8

MCA supplies what?

lateral surface of brain and part of all 5 lobes

9

MCA functional territories supply?

1. motor sensory for most body except UL
2. Language (Broca's Wernicke)

10

PCA supplies what?

medial and inferior temporal/occipital lobes

11

PCA territories?

visual cortex

12

What supplies basal ganglia and internal capsule?

lenticulostriate arteries

13

what supplies pons?

pontine branches of basilar artery

14

What supplies hypothalamus/thalamus?

posterio perforating branches off of PCA

15

perforating vessels off the ACOM supply?

optic chiasm/hypothalamus

16

2 named arteries that come off internal carotid before turning into MCA?

1. opthalmic artery
2. anterior choroidal:deep lateral structures, ventricles, hippocampus

17

Lenticulostriate arteries supply?

Basal Ganglia
Internal capsule

18

3 vessels that supply the cerebellum?

1. superior cerebellar artery
2. anterior inferior cerebellar artery (first branch of basilar)
3. posterior inferior cerebellar artery (branch of vertebral

19

Midbrain supplied by?

superior cerebellar artery

20

pons supplied by?

basilar artery

21

medulla supplied by?

1. PICA (lateral)
2. Vertebral artery (ventro-lateral)
3. anterior spinal (medial)

22

what is medial medullary syndrome?

damage to anterior spinal artery resulting in
1. hypoglossal n. damage
2. medial lemniscus damage
3. contralateral hemiparesis/hemideficit

23

Spinal arteries are reinforced by?

1. radicular arteries
2. segmental branches of aorta (intercostal/lumbar)

24

venous drainage of brain?

inferior sagittal>Galen&internal cerebral>straight sinus>superior sagittal>confluence>transverse sinus>sigmoid sinus>internal jugular

25

what can diffuse across BBB?

gases, lipid soluble substances

26

what is actively transported across BBB?

glucose, AAs