Blood Supply

Question 1

Brain constitutes ___% body weight

Answer 1

2%

Question 2

% Cardiac output requirement of brain

Answer 2

17%

Question 3

Brain utilizes ___% of oxygen

Answer 3

20%

Question 4

Cerebral blood flow

Answer 4

50 ml/100g brain tissue/ minute

Question 5

Normal blood flow and mean oxygen consumption of average weight brain

Answer 5

750 ml / min

3.3 ml/100 g brain tissue per min

Question 6

Origin of left common carotid

Answer 6

Aortic arch

Question 7

Origin of right common carotid artery

Answer 7

Branch in bifurcation of brachiocephalic artery

Question 8

At what level does the common carotid artery bifurcate

Answer 8

Thyroid cartilage

Question 9

4 segments of ICA

Answer 9

Cervical
Intrapetrosal
Intracavernous
Cerebral (supraclinoid)

Question 10

“Carotid siphon”

Answer 10

Intracavernous and cerebral portions of ICA

Question 11

Begins as the artery emerges from the cavernous sinus and pass medial to anterior clinoid process

Answer 11

Cerebral segment of ICA

Question 12

ICA segment extending from bifurcation of common carotid to carotid canal in petrous bone; has no branches

Answer 12

Cervical segment

Question 13

ICA segment surrounded by dense bone

Answer 13

intrapetrosal segment

Question 14

Major branches of ICA (3)

Answer 14

ophthalmic
posterior communicating
anterior choroidal

Question 15

ophthalmic artery enters orbit through _____

Answer 15

optic foramen, ventral and lateral to the optic nerve

Question 16

position ophthalmic artery in relation to CN II

Answer 16

ventral and lateral

Question 17

arises from dorsal aspect of the carotid siphon and passes posteriorly and medially to join the PCA

Answer 17

PComm Artery

Question 18

PComm Artery origin and course

Answer 18

arises from dorsal aspect of the carotid siphon and passes posteriorly and medially to join the PCA

Question 19

usually arisis from the ICA distal to the PComm and passes backward across optic tract then laterally to enter the choroidal fissure in temporal lobe

Answer 19

anterior choroidal artery

Question 20

Regarded as the direct communication of the ICA

Answer 20

MCA

Question 21

where ICA divides to ACA and MCA

Answer 21

lateral to optic chiasm

Question 22

Areas supplied by MCA and ACA

Answer 22

anterior 1/2 of thalamus
basal ganglia
corpus callosum
most of the internal capsule
medial and lateral surface of frontal and parietal lobes
lateral surface of temporal lobe

Question 23

origin of vertebral artery

Answer 23

first part of subclavian artery