Anatomy

Question 1

innervation of nose and nasopharyx primarily from

Answer 1

trigeminal nerve

Question 2

innervation of oropharynx primarily from

Answer 2

glossopharyngeal

can block through anterior tonsillar pillar.

Question 3

superior laryngeal nerve (off the vagus) - INTERNAL BRANCH provides sensory function to

Answer 3

hypopharynx and supraglottic larynx

SIME
sensory - internal
motor- external

Question 4

what’s the only muscle the external branch of the superior laryngeal nerve innervates?

Answer 4

the cricothyroid muscle

adducts the vocal cords (TENSES)

Question 5

what’s the ONLY laryngeal muscle that causes ABDUCTION of the true vocal cords?

Answer 5

posterior cricoarytenoid muscle (RLN innervation)

Question 6

what does injury to the SLN look like?

Answer 6

unilateral: not much
b/l: hoarseness, tiring of voice

(remember, it TENSES the VC)

Question 7

what does injury to the RLN look like?

Answer 7

most commonly during thyroid surgery

unilateral: hoarseness (loss of ABduction)
bilateral: stridor, aphonia, respiratory distress

Question 8

MC injured nerve in lithotomy

Answer 8

peroneal 
#2: sciatic

Question 9

sartorial nerve action

Answer 9

anteriorbrnch of femoral
bend kneeto look at bottom of foot

(will twitch if too superficial and medial for fem nerve block - WANT posterior branch of femoral). go DEEPER and LATERAL