Neuro: vertibrobasilar system

Question 1

vertebral artery is a branch of _____

Answer 1

subclavian

Question 2

vertebral artery gives rise to ____ and ____

Answer 2

anterior spinal artery

posterior inferior cerebellar artery

Question 3

anterior spinal artery supplies

Answer 3

anterior 2/3 of spinal cord

pyramid, medial lemniscus and root of CN XII in the medulla

Question 4

PICA supplies

Answer 4

dorsolateral quadrant of medulla

• Nucleus ambiguus (CN IX, X, XI)
• inferior surface of cerebellum

Question 5

two vertebral arteries form the ____ artery

Answer 5

basilar

Question 6

basilar artery gives rise to five arteries

Answer 6

1. paramedium branches of the pontine arteries
2. labyrinthine artery (can also arise from AICA in 15% of people…. tricky)
3. anterior inferior cerebellar artery (AICA)
4. superior cerebellar artery
5. posterior cerebral artery

Question 7

paramedian branches of the pontine artery supplies ___

Answer 7

base of the pons

• corticospinal fibers
• exiting root fibers of the abducens nerve (CN VI)

Question 8

AICA supplies

Answer 8

• caudal lateral pontine tegmentum
• CN VII
• spinal trigeminal tract of CN V
• inferior surface of cerebellum

Question 9

superior cerebellar artery

Answer 9

dorsal tegmentum of rostral pons
superior cerebellar peduncle
superior surface of cerebellum
cerebellar nuclei
cochlear nuclei

Question 10

posterior cerebral artery

Answer 10

major blood supply to midbrain
thalamus
medial and lateral geniculate bodies
occipital lobe

Question 11

occlusion of posterior cerebral artery

Answer 11

contralateral hemianopia with macular sparing