Circulation of the CNS

Question 1

how much of cardiac output goes to the brain?

Answer 1

10-20%

Question 2

perfusion to the brain remain unchanged between blood pressure ranging from

Answer 2

80-140 mmHg

Question 3

more blood vessels are found in

Answer 3

Grey matter

Question 4

Formed by 2 systems

Answer 4

Vertebral Arteries

Internal Carotid Arteries

Question 5

where do vertebral arteries come from?

Answer 5

subclavian

Question 6

where do vertebral and carotid arteries come from

Answer 6

foramen magnum

carotid cannal

Question 7

ACA supplies

Answer 7

the corpus callosum
medial aspect of frontal, temporal lobe, parietal
sensory and motor cortex to lower limb and trunk

Question 8

MCA

Answer 8

supplies lateral surface of frontal, temporal, insular, parietal, occipital
over lateral fissure
supplies areas (most sensory and motor of the body, broca’s and wernicke’s)

Question 9

PCA

Answer 9

medial inferior surfaces of temporal and occipital lobes
area (visual cortex) and dorsal surface of parietal and occipital and temporal
is the terminal branch of the basilar artery
DAMAGE (contralateral homonimus hemianopia)

Question 10

what are the 4 groups of perforating arteries

Answer 10

posterior (midbrain, thalamus and hypothalamus)
pontine (pons from basilar)
leteral-lenticulostriate (from MCA, basal ganglia and internal capsule)
anterior (optic chiasm and anterior hypothalamus)

Question 11

important arteries from the ICA in the brain?

Answer 11

Opthalmic Arteries (eye, retina, top of nasal cavity)
Anterior Choroidal Artery (optic tracts, lateral ventricles, hyppocampus)

Question 12

In order what are the rami of the cerebellar arteries?

Answer 12

Superior Cerebellar Artery
Pontine branches (straight from basilar)
Anterior Inferior Cerebellar Artery
Posterior Inferior Cerebellar Artery
Vertebral Artery
Anterior Spinal Artery
Posterior Spinal Arteries

Question 13

What does the Superior Cerebellar Artery supply with the PCA

Answer 13

SCA: midbrain level of the colliculi (dorsally)
PCA: anteriorly

Question 14

What does the Postero Inferior Cerebellar Artery supply

Answer 14

the dorsal part of the ventral

Question 15

What does the Anterior Spinal Artery supply

Answer 15

from 6-8 of the dorsal part of the medulla (hypoglossal nucleus, pyramid and medial lemniscus)

Question 16

What is the anterior medullary symptom?

Answer 16

damage to the medulla to the area supplied by the anterior spinal artery
ipsilateral tongue paralysis
contralateral sensory and motor loss