Ear

Question 1

Auricle

Answer 1

Pinna, part of external ear. Supported by auricular cartilage

“Auris” means ear

Question 2

External acoustic meatus
(Middle and Inner Ear on VIN)

-What is proper word for earwax?

Answer 2

Canal leading from base of auricle to the tympanic membrane. Cartilaginous at first, then becomes bony proximally.

Earwax is called cerumen, “cera” means wax in Latin

Question 3

Auricular cartilage

Answer 3

Supports the auricle

Question 4

Tragus

Answer 4

Auricular cartilage. Means goat in Ancient greek. It means the tuft that they have on beard

Question 5

Tympanic cavity

Answer 5

Filled with air. Communicates with the nasopharynx via the auditory tube (musculotubal canal on VIN). Lateral border is tympanic membrane, medial border is temporal bone

Question 6

Tympanic membrane
(Middle and Inner Ear on VIN)

Answer 6

Separates external acoustic meatus from the middle ear (tympanic cavity)

Question 7

Tympanic bulla
(Middle and Inner Ear on VIN)

Answer 7

“Bulla” means bubble in Latin.

Bulbous expansion of the temporal bone. Floor of the tympanic cavity.

Question 8

Vestibular window
(Middle and Inner Ear on VIN)

Answer 8

Between the medial wall of the tympanic cavity and vestibule of the inner ear. Stapes attached to this membrane.

Also called oval window.

Question 9

Auditory tube

Answer 9

Connects tympanic cavity (middle ear) to the nasopharynx. Equalizes air pressure

Question 10

Auditory ossicles: Malleus, incus, stapes
(Middle and Inner Ear on VIN)

Answer 10

Hammer, anvil and stirrup. Handle of malleus is in the tympanic membrane. The footplate of the stapes sits in the vestibular window

Question 11

Utriculus

Answer 11

Detects linear acceleration. Have 3 semicircular ducts attached.

Question 12

Sacculus

Answer 12

Origin of endolymphatic duct. Attached to the cochlear duct

Question 13

Cochlea
(Middle and Inner Ear on VIN)

Answer 13

Has perilymphatic fluid inside, surrounding the cochlear duct.

Question 14

Cochlear window
(Middle and Inner Ear on VIN)

Answer 14

Opening in medial wall of tympanic cavity, other side is the cochlea. Pressure relief valve, allows perilymph to move through cochlea.

Also called round window

Question 15

Cochlear duct
*Cochlear canaliculus on VIN
(Middle and Inner Ear on VIN)

Answer 15

Attached to the sacculus, sits between the vestibular and tympanic ducts.

Contains endolymph. Inside the cochlea, and surrounded by perilymph.

Question 16

Perilymphatic duct

Answer 16

Within the temporal bone, connects perilymphatic space of the inner ear to the subarachnoid space

Question 17

Endolymphatic duct

Answer 17

From the sacculus to the dura mater. Involved in resorption of endolymph

Question 18

Semicircular duct

Answer 18

Detect rotational movements. Wide part before the utriculus called ampulla

Question 19

Internal acoustic meatus
(Middle and Inner Ear on VIN)

Answer 19

Passage in the temporal bone, facial and vestibulocochlear nerves enter

Question 20

Vestibulocochlear nerve
(Middle and Inner Ear on VIN)

Answer 20

Divides at the internal acoustic meatus into auditory and cochlear nerves