unit 8: special senses, middle ear

Question 1

middle ear is a small space between what two structures

Answer 1

tympanic cavity

epitympanic recess

Question 2

three small bones found in the middle ear

Answer 2

incus
malleus
stapes

Question 3

two muscles within the tympanic cavity

Answer 3

stapedius

tensor tympani

Question 4

boundary of middle ear formed by petrous part of temporal bone

Answer 4

roof (tegmental wall)

Question 5

boundary of middle ear formed by a thin layer of bone sep the cavity from the internal jugular vein
-tympanic branch of glossopharyngeal n. passes thru this bone

Answer 5

floor (jugular wall)

Question 6

boundary of middle ear formed almost entirely by tympanic membrane, with a bony part adjacent to the epitympanic recess

Answer 6

lateral (membranous wall)

Question 7

boundary of middle ear that is incomplete

Answer 7

posterior (mastoid wall)

Question 8

the ___ of the ___ ___ is an opening between the tympanic cavity and mastoid air cells
-posterior/mastoid wall

Answer 8

aditus of the mastoid antrum

Question 9

on the posterior wall: the __ __ is the opening that the tendon of the stapedius muscle passes thru, and there is also an opening for the __ __

Answer 9

pyramidal eminence

chorda tympani

Question 10

boundary of middle ear that sep the cavity from the internal carotid artery

Answer 10

carotid wall (anterior wall)

Question 11

in the cartid wall there is:

• lg opening for the ____ tube
• opening for __ __ to pass thru
• sm opening for __ __ to exit the cavity

Answer 11

pharyngotympanic
tensor tympani
chorda tympani

Question 12

boundary of middle ear that is the boundary bt the middle and inner ears

Answer 12

labyrinthine (medial wall)

Question 13

___ is an impression made by the cochlea that is covered by the tympanic plexus, which is formed by the tympanic branch of CN IX and branches from the __ __ plexus

Answer 13

promontory

internal carotid

Question 14

• mucous membranes of the middle ear, ___ area and ___ tube are supplied by the tympanic plexus
• lesser petrosal nerve travels from it to the __ ganglion

Answer 14

mastoid
pharyngotympanic
otic

Question 15

the __ window is found in the labyrinthine wall, while the ___ attaches to the OVAL window here

Answer 15

round

stapes

Question 16

w/i the labyrinthine wall, there are bony impressions from the (2):

Answer 16

prominence of facial canal

lateral semicircular canal

Question 17

largest of small bones in tympanic cavity, that is in contact with tympanic membrane

Answer 17

malleus

Question 18

middle small bone that transmits vibration from the small bones before and after it

Answer 18

incus

Question 19

third bone in small bone sequence, its base sits against the oval window

Answer 19

stapes

Question 20

the __ __ branch of the internal maxillary artery and the __ branch of the internal carotid artery lend blood supply to the middle ear

Answer 20

anterior tympanic

tympanic

Question 21

sensory supply to the middle ear is via the

Answer 21

tympanic nerve (of CN IX)

Question 22

motor supply in the middle ear is via the:

• nerve to stapedius (of facial nerve)
• __ __ nerve (of mandib division, trigem), which supplies the tensor tympani muscle

Answer 22

medial pterygoid

Question 23

sympathetic supply in middle ear:

____ nerves carry VASOmotor and SECRETOmotor fibers from the __ __ ganglion via the internal carotid plexus

Answer 23

caroticotympanic

superior cervical