Dr. Gegel's Announcement

Question 1

The airway is innervated by what 3 CN?

Answer 1

Trigeminal
Glossopharyngeal
Vagus

Question 2

The trigeminal nerve (CN V) provides sensory innervation to what?

Answer 2

Face and it divides into 3 branches V1, V2, V3

Question 3

V1 innervates what?

Answer 3

Nares/septum

Question 4

V2 innervates what?

Answer 4

Turbinates/Septum

Question 5

V3 innervates what?

Answer 5

Anterior 2/3 tongue

Question 6

The glosspharyngeal (CN IX) provides sensory innervation to

Answer 6

Posterior 1/3 tongue, oropharynx, vallecula, and anterior side epiglottis

Question 7

The vagus nerve divides into what 2 branches?

Answer 7

superior laryngeal nerve (SLN) and recurrent laryngeal nerve (RLN)

Question 8

The SLN further divides into what 2 branches?

Answer 8

Internal and External branches

Question 9

The internal branch of SLN provides sensory innervation to?

Answer 9

from pos side epiglottis to the vocal cords (VCs) with no motor function

Question 10

The external branch of SLN provides motor innervation to

Answer 10

cricothyroid muscle (tenses the VCs) with no sensory function.

Question 11

Injury to the SLN may cause

Answer 11

hoarseness, but not respiratory distress

Question 12

The RLN provides SENSORY innervation to

Answer 12

the larynx below level of VCs as well as the trachea

Question 13

The RLN provides MOTOR innervation to

Answer 13

all laryngeal muscles except the cricothyroid

Therefore, unilateral injury results in paralysis of the ipsilateral VC ABDuctors where the affected VC assumes the ADDucted paramedian position causing hoarseness, but not respiratory distress.

Question 14

Bilateral RLN injury results in

Answer 14

bilateral paralysis of the VC ABDuctors, closing the VCs resulting in an airway emergency requiring intubation or tracheostomy