Sensory Innervation of Airway

Question 1

What nerve innervates nasal mucosa to provide sense of smell?

Answer 1

Olfactory nerve (CN I)

Question 2

What divisions of trigeminal nerve (CN V) innervate mucous membranes and nose

Answer 2

V1-V3

Question 3

V1 is what division of trigeminal nerve, what is the nerve name, and what does it innervate?

Answer 3

Opthalmic divison, anterior ehtmodial nerve, anterior nose

Question 4

V2 is what division of trigeminal nerve, what is the name of the nerve, and what does it innervate?

Answer 4

Maxillary division, sphenopalantine nerve, posterior nose

Question 5

V3 is what division of trigeminal nerve, what is the name and what does it innervate?

Answer 5

Mandibular division, lingual nerve, anterior 2/3 of tongue

Question 6

What division of trigeminal nerve (CN V) provides sensory to the superior & inferior surfaces of the hard and soft palate

Answer 6

Palantine nerve (division ov V2)

Question 7

Sympathetic innervation from the superior cervical ganglion results in…

Answer 7

vasoconstriction and shrinkage of the nasal tissue

Question 8

What nerve innervates the posterior 1/3 of of the tongue

Answer 8

Glossopharyngeal (CN IX)

Question 9

Branches from what two nerves provide sense of taste?

Answer 9

Glossopharyngeal (CNIX) and Facial nerve (VII)

Question 10

What does glossopharyngeal nerve (CN IX) innervate?

Answer 10

posterior 1/3 of tongue, the roof of the pharynx, tonsils, epiglottis, base of the tongue, and the under surface of the soft palate

Question 11

What nerve carries the afferent sensory of gag reflex

Answer 11

Glossopharyngeal (CN IX)

Question 12

What nerve carries the efferent motor action of the gag reflex

Answer 12

Vagus nerve (CN X)

Question 13

Nerves blocked during nasal intubation

Answer 13

V1-V3

Question 14

Nerves blocked during awake intubation

Answer 14

Glosspharyngeal (CN IX) and Vagus (CN X)

Question 15

If we want to block gag reflex which nerve do we block

Answer 15

CN IX (Glossopharyngeal)

Question 16

Provides sensation to airway below the epiglottis

Answer 16

Vagus nerve (CN X)

Question 17

What does the SLN divide into?

Answer 17

External and internal branches

Question 18

What branch branches earlier off of the SLN

Answer 18

Internal branch

Question 19

Provides sensory input to the hypopharynx above the vocal cords

Answer 19

Internal branch of SLN

Question 20

Provides motor nerve function to the cricothyroid muscle

Answer 20

External branch of SLN

Question 21

Provides sensory innervation to the subglottic area and the trachea (below the cords)

Answer 21

RLN

Question 22

What does the RLN divide into

Answer 22

Right and left RLN

Question 23

Provides motor function to all the muscles of the larynx except the cricothyroid muscle (which is supplied by the external branch of SLN)

Answer 23

Motor branch of RLN

Question 24

Right RLN loops around…

Answer 24

the subclavian and the innominate (brachiocephalic) artery

Question 25

Left RLN loops around…

Answer 25

the aorta

Question 26

Unilateral vagus nerve damage can cause

Answer 26

Hoarseness

Question 27

Bilateral vagus nerve damage causes

Answer 27

Aphonia

Question 28

Unilateral SLN damage causes

Answer 28

minimal effects

Question 29

Bilateral SLN damage causes

Answer 29

hoarseness, tiring of voice

Question 30

Unilateral RLN damage causes

Answer 30

hoarseness

Question 31

Bilateral chronic RLN damage causes

Answer 31

aphonia

Question 32

Bilateral acute RLN damage causes

Answer 32

stridor and respiratory compromise