H&N - Ear

Question 1

Anatomy of auricle

Answer 1

Question 2

Sensory innervation of auricle

Answer 2

Posterior surface:

Lower ⅔ : great auricular (C2-3)
Upper ⅓: lesser occipital (C2)

Anterior surface:

Lower ⅔: great auricular (C2-3)

Superior ⅓: auriculotemporal (V3)

Vagus: concha

Deeper: vagus

Question 3

Sensory innervation of external auditory meatus

Answer 3

Auriculotemporal (V3): anterior, superior

Vagus: posterior and inferior

Question 4

Middle ear sensory innervation

Answer 4

Glossopharyngeal

Question 5

Tympanic membrane anatomy

Answer 5

Question 6

Bones of middle ear

Answer 6

Question 7

Tensor tympania innervation

Answer 7

Trigeminal nerve V3

Dampens vibrations from loud sound

Question 8

Stapedius innervation

Answer 8

Facial nerve

Dampens ossicles movement from loud sound

Question 9

Middle relation to IJV

Answer 9

IJV is inferior

Question 10

Middle ear posterior wall

Answer 10

Mastoid antrum superiorly

Pyramid inferiorly

Question 11

Middle ear relation to ICA

Answer 11

ICA is anterior and inferior to middleear

Question 12

Middle ear relation to facial nerve

Answer 12

runs medially

Question 13

Which bone is eustachian tube found in

Answer 13

petrous of temporal bone

Question 14

Where does the chorda tympani run in relation to the tympanic membrane

Answer 14

Medial to pars flaccida