Trigeminal & Facial Nerves

Question 1

What is the main sensory nerve to the head?

Answer 1

trigeminal N

Question 2

Trigeminal N is (sensory/motor/mixed).

Answer 2

mixed

Question 3

Trigeminal N is motor to ___________ and sensory to ________.

Answer 3

muscles of mastication
skin of head

Question 4

(T/F) The trigeminal nerve is sensory for taste and contains PSNS axons.

Answer 4

False - neither

Question 5

List the 5 muscles of mastication.

Answer 5

1. masseter
2. temporalis
3. medial pterygoid
4. lateral pterygoid
5. rostral belly of digastricus

Question 6

All the muscles of mastication (open/close) the mouth except _______ which (opens/closes) the mouth.

Answer 6

close
rostral belly of digastricus
opens

Question 7

List the 3 branches of the Trigeminal nerve.

Answer 7

ophthalmic
maxillary
mandibular

Question 8

The ophthalmic nerve is (motor/sensory/mixed).

Answer 8

sensory (to structures around eye)

Question 9

What three nerves branch from the ophthalmic nerve?

Answer 9

1. lacrimal N
2. frontal N
3. nasociliary N

Question 10

The maxillary nerve is (sensory/motor/mixed).

Answer 10

sensory

Question 11

List the 3 branches of the maxillary nerve.

Answer 11

1. cornual branch N
2. pterygopalatine N
3. infraorbital N

Question 12

The pterygopalantine nerve splits and supplies most of the nasal cavity via _______, hard palate via _______, and soft palate via _______.

Answer 12

caudal nasal N
major palatine N
minor palatine N

Question 13

The pterygopalatine N supplies ___________ axons to the lacrimal gland and glands of nasal cavity via ________ to stimulate secretion.

Answer 13

parasympathetic postganglionic
pterygopalatine ganglion

Question 14

What nerve is sensory to the upper lip and upper teeth?

Answer 14

infraorbital N (branch of maxillary)

Question 15

The mandibular nerve is (sensory/motor/mixed).

Answer 15

mixed

Question 16

The mandibular nerve is motor to ______ and sensory to ______.

Answer 16

muscles of mastication
head ventral to facial crest

Question 17

Which branch of the mandibular N is motor?

Answer 17

masticatory N

Question 18

_______ N supplies motor innervation to the masseter M.

Answer 18

masseteric N

Question 19

________ N supplies motor innervation to the temporalis M.

Answer 19

caudal deep temporal N

Question 20

What are the 4 branches of the mandibular nerve that are sensory?

Answer 20

1. buccal N
2. auriculotemporal N
3. lingual N
4. inferior alveolar N

Question 21

What nerve is sensory to rostral 2/3 of the tongue? Which is sensory to all lower teeth and lower lip?

Answer 21

lingual N
inferior alveolar N

Question 22

The facial N is (sensory/motor/mixed).

Answer 22

mixed

Question 23

What is the sensory ganglion of the facial N called?

Answer 23

geniculate ganglion

Question 24

The facial N is motor to _________ and sensory to ________.

Answer 24

muscles of facial expression
skin of the ear canal

Question 25

(T/F) The facial N is sensory for taste on the rostral 2/3 of the tongue.

Answer 25

True

Question 26

The facial N supplies (SNS/PSNS) innervation to what structures?

Answer 26

PSNS lacrimal gland, mandibular salivary gland, sublingual salivary gland, glands in nasal cavity

Question 27

What is the only branch of the facial N that is sensory? What is it sensory to?

Answer 27

internal auricular branch skin of ear canal + taste

Question 28

List the motor branch of the facial N based on what it innervates: 1. cervicoscutularis + cervicoauricularis Mm 2. caudal belly of digastricus M 3. zygomaticoscutularis & zygomaticoauricularis Mm + orbicularis oculi M 4. muscles that move nostrils, lips, cheeks 5. muscles that move lower lip & cheek 6. cutaneous colli M

Answer 28

1. caudal auricular N 2. digastric branch 3. auriculopalpebral N 4. buccal branches 5. marginal mandibular branch 6. cervical branch

Question 29

The facial N is referred to as __________ N.

Answer 29

intermediofacial

Question 30

Term for bundle of axons between facial and vestibulocochlear Nn with axons for taste buds on the rostral 2/3 of the tongue and PSNS to salivary glands.

Answer 30

chorda tympani

Question 31

If a lip laceration, you need a(n) __________ N block.

Answer 31

infraorbital

Question 32

If an upper eyelid laceration, you need to block ___________ N to desensitize but ___________ N to paralyze orbicularis oris M.

Answer 32

supraorbital auriculopalpebral

Question 33

To remove the eye such as in "cancer eye" in cattle, what two blocks can you use? Which is one injection vs. four?

Answer 33

1. peterson eye block (one injection) 2. four-point retrobulbar block (4)