G1 Ear

Question 1

Tensor Tympani muscle is attached to the _____ to tense the tympanic membrane

Answer 1

Malleus

Question 2

Air space within temporal bone that serves as relay center for sound waves is known as _____.

It has two continuous regions:
____ is medial to tympanic membrane.
____ is superior to tympanic membrane.

Answer 2

Tympanic Cavity

Tympanic Cavity Proper
Epitympanic Recess

Question 3

Middle Ear Cavity relationships:
Anteriorly- leads to ____
Posterior- leads to ____
Epitympanic Recess = superior to tympanic membrane

Answer 3

Auditory (eustachian) tube, continues to nasopharynx

Aditus ad antrum

Question 4

The manubrium of the malleus is directly attached to the ____

Answer 4

Tympanic Membrane

Question 5

Protuberance from the cochlea facing the tympanic membrane

Answer 5

Promontory

Question 6

Oval window, receives base of stapes

Answer 6

Fenestra Vestibuli

Question 7

Round window, membrane covered, inferior to oval.

Answer 7

Fenestra Cochlea

Question 8

Separates middle ear cavity from carotid canal. Formed by thin plate of tympanic portion of the temporal bone.

Answer 8

Carotid Wall (ant. Middle ear)

Question 9

Hollow projection of bone, serves a origin of stapedius m.

Answer 9

Pyramidal Eminence

Question 10

Entrance to tympanic antrum, leads into mastoid air cells

Answer 10

Aditus Ad Antrum

Question 11

Smallest striated m in body. Arise from cavity inside pyramidal eminence. Inserts into neck of stapes. Pulls head of stapes posteriorly. Innervated by CN VII

Answer 11

Stapedius m.

Question 12

Greater Petrosal n is a branch off _____ of CN ____. Carries ____ fibers to ____.

Answer 12

Geniculate ganglion

VII

P-symp

Pterygopalatine ganglion

Question 13

Covers promontory in middle ear cavity. Runs under and supplies mucosal lining of middle ear cavity. Supplies mastoid air cells and auditory tube. Formed by tympanic br of CN IX and cartoticotympanic nn.

Answer 13

Tympanic Plexus of nn

Question 14

Lesser Petrosal n is a branch of ____ from CN ___.

Carries ____ fibers to ___ which will supply the ____.

Answer 14

Tympanic plexus
IX

Presynaptic P-symp
Otic Ganglion
Parotid Gland

Question 15

Fluid-filled chamber for hearing and equilibrium

Answer 15

Internal Ear

Question 16

Controls balance and position (part of internal ear)

Answer 16

Semicircular Canals

Question 17

Controls hearing (part of internal ear)

Answer 17

Cochlea

Question 18

Beginning of cochlea, receives stapes (part of internal ear)

Answer 18

Oval Window

Question 19

End of cochlea, closed by membrane (part of internal ear)

Answer 19

Round window

Question 20

Fluid outside the cochlear duct is _____

Fluid inside the cochlear duct is _____

Answer 20

Perilymph

Endolymph

Question 21

Scala Vistibuli and Scala Tympani interconnect at the apex of the cochlea known as _____

Answer 21

Helicotrema

Question 22

Bleeding in auricle may result in blood collecting betweeen the perichondrium and auricular cartilage. If untreated -> fibrosis -> cauliflower ear.
This condition is known as ____.

Answer 22

Auricular Hematoma

Question 23

Swimmers ear (bacterial infection in skin of external ear)

Answer 23

Acute Otitis Externa

Question 24

Earache; pus or fluid in middle ear. Often secondary to upper respiratory infection.

Answer 24

Otitis Media

Question 25

Can result from otitis media; foreign bodies, trauma, or excessive pressure. Minor ruptures often heal spontaneously

Answer 25

Perforation of Tympanic Membrane