Ear Anatomy

Question 1

The mastoid process is part of what skull bone?

Answer 1

Temporal

Question 2

The _______ portion of the temporal bone forms the cranial floor and houses the middle and inner ear cavities

Answer 2

Petrous

Question 3

CN VIII

Answer 3

Vestibulocochlear nerve (balance and hearing)

Question 4

CN VII

Answer 4

Facial nerve

Question 5

CN VI

Answer 5

Abducens nerve

Question 6

Acoustic meatus aka

Answer 6

External auditory canal

Question 7

CN ____ runs through the parotid gland

Answer 7

VII (Facial nerve)

Question 8

External ear consists of:

Answer 8

Auricle, external auditory canal (acoustic meatus), TM (eardrum)

Question 9

The middle ear contains:

Answer 9

malleous, incus, stapes, eustachian tube

Question 10

Smallest skeletal muscle in the body

Answer 10

Stapedius muscle

Question 11

Two main divisions of the internal ear

Answer 11

Bony labyrinth (outer) AND membranous labyrinth (inner)

Question 12

The bony labyrinth contains ____ fluid

Answer 12

Perilymph (similar to CSF)

Question 13

Membranous labyrinth contains ____ fluid, which has a lot of K+ and plays a role in auditory signaling

Answer 13

Endolymph

Question 14

Otalgia

Answer 14

pain in ear

Question 15

Otorrhea

Answer 15

discharge from ear