Vertebrobasilar System: Basilar Artery

Question 1

Origin

Answer 1

At pons lower border by union of 2 vertebral arteries

Question 2

Courses

Answer 2

Passes along pons basilar groove lying on occipital bone basilar part

Question 3

End

Answer 3

At pons upper border by dividing into 2 posterior cerebral arteries

Question 4

Branches

Answer 4

1. Anterior inferior cerebellar artery
2. Pontine branches
3. Labyrinthine artery
4. Superior cerebellar artery
5. Posterior cerebral arteries

Question 5

Anterior inferior cerebellar artery course

Answer 5

Passes lateral and backwards around pons lower border

Question 6

Anterior inferior cerebellar artery end

Answer 6

Supply anterior part of cerebellum inferior surface and MCP

Question 7

Anterior inferior cerebellar artery supply

Answer 7

Sometimes give labyrinthine artery

Question 8

Pontine branches

Answer 8

1. Paramedian
2. Short circumferential
3. Long circumferential

Question 9

Paramedian supply

Answer 9

Basis Pontis median zone

Question 10

Short circumferential

Answer 10

Basis pontis lateral zone

Question 11

Long circumferential supply

Answer 11

Pons tegmentum

Question 12

Labrythine artery

Answer 12

Accompany 7th and 8th cranial nerves into internal auditory meatus

Question 13

Labrythine artery supply

Answer 13

Internal ear

Question 14

Superior cerebellar artery

Answer 14

Passes around midbrain lower part reaching cerebellum superior surface

Question 15

Superior cerebellar artery supply

Answer 15

1. Superior cerebellar surface
2. SCP