N16 cranial nerve nuclei

Question 1

All cranial nerves exit ventrally except for one?

Answer 1

IV - trochlear nerve

Question 2

name the 3 motor componenents

Answer 2

• Somatic motor
• visceral motor (parasympathetic)
• Branchio motor

Question 3

list the cranial nerves which are somatic motor?

Answer 3

• oculomotor
• trochlear
• abducens
• hypoglossal

Question 4

which somatic nerves are found in the midbrain?

Answer 4

oculomotor

trochlear

Question 5

which somatic motor nerves are found in the pons?

Answer 5

abducens

hypoglossal

Question 6

which muscles does the oculomotor nerve innervate?

Answer 6

skeletal muscles of levator palprebal
AO3 - SR, MR, IR
inferior oblique muscle

Question 7

what is special about the trochlear nerve?

Answer 7

only cranial nerve to exit dorsally as all other exit ventrally and it crosses the midline

Question 8

which muscles does the trochlear (IV) nerve supply?

Answer 8

Superior oblique

Question 9

where is the trochlear nucleus found?

Answer 9

midbrain

Question 10

where is the abducens found and what muscles do they innervate?

Answer 10

pons

Lateral rectal muscle of ipsilateral orbit

Question 11

where is the hypoglossal nerve found and where is the nucleus located?

Answer 11

nerve is found in pons and nucleus is located in medulla (long thin nucleus)

Question 12

which muscles does the hypoglossal nerve (somatic motor) innervate?

Answer 12

supplies 3/4 extrinsic muscles of the tongue
- genioglossus, hyoglossus and styloglossus
and all intrinsic muscles

Question 13

what effect does left sided hypoglossal nerve palsy have?

Answer 13

patient complained of progressive difficulty with speech

Question 14

recap the somatic motor cranial nerves?

Answer 14

III
IV
VI
XII

Question 15

Which muscles are the visceral motor parasympathetic related to?

Answer 15

Glands/smooth muscle

Question 16

which nerve is associated with the edinger-westphal nucleus (parasympathetic)?

Answer 16

oculomotor

Question 17

where is the edinger westphal nucleus found?

Answer 17

midbrain

Question 18

which muscles are associated with the edingerwestphal nucleus (parasympathetic)?

Answer 18

pupillary sphincter

ciliary muscle

Question 19

list the 4 parasympathetic nuclei?

Answer 19

• edinger-westphal
• sup. salivatorynucleus (VII)
• inf. salivatory nucleus (IX)
• dorsal nucleus of vagus (X)

Question 20

where is the sup.salivatory nucleus found and what cranial nerve is associated with it?

Answer 20

pons and facial nerve

Question 21

where is the inferior salivatory nucleus found and what nerve is it associated with?

Answer 21

medulla

IX

Question 22

where is the dorsal nucleus of vagus located and what nerve is associated with?

Answer 22

medulla and vagus

Question 23

which nuclei and cranial nerve are associated with the pupillary sphincter and ciliary muscle?

Answer 23

III
edinger-westphal nucleus
para

Question 24

which nuclei and cranial nerve are associated with subman/ling and pterygopalatine?

Answer 24

sup. salivatory nucleus
VII
para

Question 25

which nuclei and cranial nerve are assoicated with the parotid?

Answer 25

inf. salivatory nucleus (IX)

para

Question 26

which nuclei is associated with glands + smooth muscle ?

Answer 26

dorsal nucleus of vagus (X)

Question 27

list the nerves associated with the branchiomotor

Answer 27

trigeminal 
facial 
glossopharyngeal
vagus 
cranial acessory

Question 28

where is the trigeminal found and what muscles does it innervate?

Answer 28

pons 
jaw, 
t.tymp
t.palatini
mylohyoid
ant belly digastric

Question 29

where is the facial nerve found and list the muscles it innervates

Answer 29

pons

facial expression/ stapedius

Question 30

where is glossopharyngeal IX located and what is it involved in?

Answer 30

medulla

swallowing

Question 31

where is the cranial accessory (XI) and what is it involved in?

Answer 31

medulla and raising the palate up and taking

Question 32

which tract has a similiar function as corticospinal but provides motor input for the nuclei serving cranial nerves 3-12 except 8?

Answer 32

corticobulbar tract