Blood supply of brainstem

Question 1

Most important branches of vertebral artery

Answer 1

Ant spinal artery (which supplies ant 2/3 of cord)

PICA

Question 2

What does the PICA supply

Answer 2

Supplies lat part of medulla

vestibular nuc, ambiguous nuc, anterolat system, spinal trigeminal trac

Question 3

What is the post spinal artery a branch of and what does it supply

Answer 3

branch of vertebral artery or PICA

Supplies post part of medulla (gracilis, cunateus)

Question 4

Ant inf cerebellar arteries (AICA) supply

Answer 4

Lat pons and ant/inf surface of cerebellum

Question 5

Labyrinthine artery supply

Answer 5

Branch of AICA, supplies structures of inner ear

Question 6

Pontine artery supply

Answer 6

Branches of bassilar

supply medial pons (deeps aswell)

Question 7

long circumferential branches

Answer 7

Supply lat pons

Question 8

Sup cerebellar arteries supply

Answer 8

rostral pons, caudal midbrain, inf colliculus, sup cerebellar peduncles and sup surface of cerebellum

Question 9

Post cerebral artery supply

Answer 9

Supply mostly midbrain

Question 10

quadrigeminal artery supply

Answer 10

supplies sup and inf colliculi

Question 11

Post choroidal artery

Answer 11

supplies post hypothalamus and sup+inf brachium, thalamus

Question 12

Ant spinal artery occlusion- name, area affected and loss

Answer 12

Medial medullary syndrome

Medial 1/3 medulla

CL voluntary motor loss
Cl loss of fine touch, vibration and proprioception (due to loss of medial lemniscus)
IL palsy of hypoglossal (tounge will deviate to affected side)

Question 13

PICA occlusion- name, affected area and loss

Answer 13

Lat medullary syndrome

1. Vertigo (vestibuli nuc)
2. Nystagmus
3. IL paraylis of soft palate, pharynx, vocal chords (ambiguous n/vagus)
4. CL loss of pain temp (spinal lemnicus)
5. Incordination of mvmt (ascending inf cerebellar peduncle tracts)
6. IL horners syndrome (descending sympathetic affected)

Question 14

Bassilar occlusion- name, location, loss

Answer 14

Locked in syndrome
medial Pons

1. quadriplegia
2. BL paraylisis of soft palate, pharynx, vocal cords (loss of corticobulbar on way to ambiguous)
   3.BL paralysis of abducens
   4- BL CN 7 palsy

Question 15

Post cerebral artery occlusion- name, loc, loss

Answer 15

Webers syndrome
lat midbrain

CL paralysis of body (descending corticospinal)

CL paralysis of lower face/tounge (corticobulbar)

IL CN3 palsy (causing down and out deviation)

Question 16

What would a aneurism of the post cerebellar artery cause

Answer 16

Compresses oculomotor n

Down and out deviation of eye
ptosis
absence of photomotor reflex