Cranial nerve tutorial part 2

Question 1

describe the shape of the midbrain on cross section

Answer 1

thinner at the back then widens at the front -penguin feet

Question 2

what feature can be seen at the back of the midbrain on cross section

Answer 2

colliculi

Question 3

what feature can be seen at the front of the midbrain on cross section

Answer 3

cerebral peduncle

Question 4

describe the shape of the pons on cross section

Answer 4

bowl shaped

Question 5

what structure is found at the back of the pons in the indentation

Answer 5

4th ventricle

Question 6

what structures can be seen at the back of the pons

Answer 6

abducens nucleus and cerebellar peduncles

Question 7

what structures can be seen at the back of the medulla

Answer 7

4th ventricle

hypoglossal nucleus, dorsal vagal nucleus

Question 8

what structure can be seen at the front of the medulla

Answer 8

pyramid, olive

Question 9

what is the shape of the rostral part of the medulla on cross section

Answer 9

butterfly

Question 10

what is the function of the spinothalamic tract

Answer 10

course touch, pain and temp

Question 11

what is the function of the spinocerebellar tract

Answer 11

unconscious proprioception

Question 12

what is the function of the medial lemniscus

Answer 12

proprioception and fine touch

Question 13

what is the function of the corticospinal and corticobulbar tracts

Answer 13

conscious movement

Question 14

what is the function of the medial longitudinal fasciculus

Answer 14

co ordination of eye and neck movements

Question 15

what structures are on the medial side in the rule of four

Answer 15

medial lemniscus
motor tracts (corticospinal and corticobulbar)
medial longitudinal fasciculus
somatic motor nuclei

Question 16

what structures are on the lateral side in the rule of four

Answer 16

sympathetic tracts
spinocerebellar
spinothalamic
somatic sensory nuclei

Question 17

what is the blood supply to the medulla

Answer 17

anterior spinal artery
vertebral
posterior inferior cerebellar

Question 18

what is the blood supply to the medial part of the medulla

Answer 18

anterior spinal

Question 19

what is the blood supply to the anterolateral part of the medulla

Answer 19

vertebral

Question 20

what is the blood supply to the posteriolateral part of the medulla

Answer 20

posterior inferior cerebellar

Question 21

what is the blood supply to the pons

Answer 21

basilar, branches of the basilar and branches of anterior inferior cerebellar

Question 22

what is the blood supply to the medial part of the pons

Answer 22

basilar

Question 23

what is the blood supply to the posterolateral part of the pons

Answer 23

branches of the basilar

Question 24

what is the blood supply to the anterolateral part of the pons

Answer 24

branches of the basilar and AICA

Question 25

what is the blood supply to the midbrain

Answer 25

basilar, posterior cerebral, posterior communicating, superior cerebellar and branches

Question 26

what is the blood supply to the to the anteriolateral part of the midbrain

Answer 26

branches of posterior cerebral

Question 27

what is the blood supply to the posterolateral part of the midbrain

Answer 27

posterior cerebral and superior cerebellar

Question 28

what is the blood supply to the medial part of the midbrain

Answer 28

basilar and posterior cerebral and posterior communicating

Question 29

what is the main arterial supply to the midbrian

Answer 29

posterior cerebral

Question 30

what is the main arterial supply to the pons

Answer 30

basilar

Question 31

what is the main arterial supply to the medulla

Answer 31

anterior spinal