Ear

Question 0

when the placode invaginates it gives rise to the ______ then to the ______

Answer 0

auditory pit, auditory vesicle

Question 1

an ectodermal thckening on the lateral “head” is called a ______

Answer 1

placode

Question 2

what gives rise to most of the membranous inner ear

Answer 2

the auditory vesicle

Question 3

what is derived from the first pharyngeal pouch

Answer 3

the auditory tube and tympanic cavity

Question 4

what is derived from the dorsal end of the ventral mandibular cartilage

Answer 4

malleus

Question 5

what is developed from the dorsal end of the first pharyngeal arch

Answer 5

the incus

Question 6

what is derived from the dorsal end of the second pharyngeal arch

Answer 6

the stapes

Question 7

what develops from the interstitial mesoderm

Answer 7

the tympanic membrane

Question 8

what develops from the first pharyngeal groove

Answer 8

the external acoustic canal

Question 9

what develops from the groove next to the first pharyngeal groove

Answer 9

the auricle

Question 10

what is included in the external ear

Answer 10

the auricle and external acoustic meatus

Question 11

what is a horn-like structure that serves to funnel sound waves to the external acoustic meatus

Answer 11

the auricle

Question 12

what muscle inserts on the front of the helix

Answer 12

the ant. auricular muscle

Question 13

what is the smallest extrinsic muscle of the auricle

Answer 13

the ant. auricular muscle

Question 14

what inserts on the superior side of the auricle

Answer 14

the superior auricular muscle

Question 15

what inserts on the lower, posterior aspect of the concha

Answer 15

the posterior auricular muscle

Question 16

what is the largest extrinsic muscle of the auricle

Answer 16

the superior auricular muscle

Question 17

what are the intrinsic muscle of the auricle

Answer 17

Helicis major
Helicis minor
tragicus
antitragicus
transcers muscle of the auricle
oblique muscle of the auricle

Question 18

what is a one inch “S” shaped structure covered by skin the entire length terminating at the tympanic membrane

Answer 18

external acoustic meatus

Question 19

modified sweat glands of the external acoustic meatus produce what

Answer 19

Cerumen

Question 20

to make otoscopic examination possible how must you pull the lobule

Answer 20

gently pull out, down and forward

Question 21

what is the blood supply to the external ear

Answer 21

posterior auricular branch of the external carotid artery
anterior auricular branch of the superficial temporal artery
auricular branch from the occipital artery

Question 22

sensory supply to the external ear is from what

Answer 22

auriculotemporal nerve (CN V1)
auricular branch of vagus
great auricular nerve (C2,C3)

Question 23

motor supply to the external ear is from

Answer 23

the temporal and posterior auricular branches of the facial nerve

Question 24

sympathetic supply to the external ear is from what

Answer 24

superior cervical ganglion

Question 25

what is a ssmall space between the tympanic membrane and the inner ear

Answer 25

the middle ear

Question 26

what are the two parts of the middle ear

Answer 26

tympanic membrane and epitympanic recess

Question 27

what three bones are found in the middle ear

Answer 27

incus, malleus, and stapes

Question 28

what two muscles are located in the tympanic cavity

Answer 28

stapedius and tensor tympani

Question 29

the roof or tegmental wall of the middle ear is formed by

Answer 29

the petrous part of the temporal bone

Question 30

the floor or jugular wall of the middle ear is formed by

Answer 30

a thin layer of bone separating the cavity from the internal jugular vein

Question 31

a small opening in the floor of the middle ear allows what to pass through

Answer 31

tympanic branch of the glossopharyngeal nerve

Question 32

the lateral or membranous wall of the middle ear is formed by

Answer 32

the tympanic membrane

Question 33

the posterior or mastoid wall of the middle ear is incomplete. it has what opening between the tympanic cavity and the mastoid air cells

Answer 33

the aditus of the mastoid antrum

Question 34

the pyramidal eminence is an opening in the posterior or mastoid wall of the middle ear. what passes through it

Answer 34

tendon of the stapedius muscle

Question 35

aside from the pyramidal eminence what is the other opening is located in the posterior or mastoid wall of the middle ear for

Answer 35

the chorda tympani

Question 36

what does the carotid wall separate the middle ear from

Answer 36

the internal carotid artery

Question 37

what wall of the middle ear has a large opening in it for the pharyngotympanic tube

Answer 37

the carotid wall

Question 38

what wall of the middle ear has an opening for the tensor tympani to pass through

Answer 38

the carotid wall

Question 39

what wall of the middle ear allows the chorda tympani to exit the middle ear

Answer 39

the carotid wall

Question 40

what is the boundary between the middle ear and the inner ear

Answer 40

the labyrinthine or medial wall

Question 41

what is an impression made by the cochlea on the labyrinthine or medial wall of the middle ear referred to

Answer 41

the promontory

Question 42

where does the stapes attach to the oval window

Answer 42

the labyrinthine or medial wall of the middle ear

Question 43

the round window is found in what wall of the middle ear

Answer 43

the labyrinthine or medial wall

Question 44

what is the largest of the three bones of the middle ear

Answer 44

the malleus

Question 45

which of the three bones of the middle ear is in contact with the tympanic membrane

Answer 45

the malleus

Question 46

which of the three small bones in the middle ear is in the middle and transmits vibration from one bone to another

Answer 46

the incus

Question 47

the incus transmits vibrations what _____ to _____

Answer 47

the malleus to the stapes

Question 48

which of the three small bones of the middle ear has its base against the oval window

Answer 48

the stapes

Question 49

what is the blood supply to the middle ear

Answer 49

anterior tympanic branch of the internal maxillary artery and tympanic branch of the internal carotid artery

Question 50

sensory supply to the middle ear is from

Answer 50

the tympanic nerve of CN IX

Question 51

motor supply to the middle ear is from

Answer 51

the nerve to stapedius (CN VII) | medial pterygoid nerve ( CN V3)

Question 52

what does the medial pterygoid nerve (CN V3) supply

Answer 52

the tensor tympani muscle

Question 53

how is sympathetic supply achieved to the middle ear

Answer 53

caroticotympanic nerves carry vasomotor and secretomotor fibers from the superior cervical ganglion

Question 54

what are the two parts of the inner ear

Answer 54

the bony and membranous parts

Question 55

what is a snail shell shaped structure in the bony labyrinth? what duct is located here

Answer 55

the cochlea, the cochlear duct

Question 56

what contains the utricle and saccule

Answer 56

the vestubule

Question 57

what are the three parts of the bony labyrinth

Answer 57

the cochlea, vestibule, and 3 semicircular canals

Question 58

the membranous labyrinth is inside the ______, bathed in ______

Answer 58

bony labyrinth, perilymph

Question 59

what is the endolymph within the membranous labyrinth

Answer 59

the cochlear labyrinth and the vestibular labyrinth

Question 60

what is the central bony structure the cochlea wraps around?

Answer 60

modiolus

Question 61

how many times does the cochlea wrap around the modiolus

Answer 61

2.5-2.75 times

Question 62

what is the apex of the cochlea referred to as? which direction is it directed

Answer 62

the cochlear cupula, directed anterolaterally

Question 63

what connects the cochlia to the modiolus

Answer 63

a bony ridge (the lamina of the modiolus)

Question 64

what three channels make up the cochlea

Answer 64

the cochlear duct, the scala vestibuli and the scala tympani

Question 65

where does the cochlear duct end

Answer 65

at the apex of the cochlea

Question 66

where doe the scala vestibuli and scala tympani communicate with each other

Answer 66

through a channel called the helicotrema at the apex of the cochlea

Question 67

what is the scala vestibuli filled with

Answer 67

perilymph

Question 68

what forms the base of the scala vestibuli

Answer 68

the oval window

Question 69

where are vibrations from the stapies transmitted

Answer 69

into the perilymph of the scala vestibuli

Question 70

where is the scala tympani located in reference to the cochlear duct

Answer 70

below

Question 71

vibrations that are transmitted through the scla vestibuli pass to the _____ via the helicotrema

Answer 71

Scala tympani

Question 72

what is the base of the scala tympani

Answer 72

the round window

Question 73

the cochlear duct is located between what two sturctures

Answer 73

the scal vestibuli is above and the scale tympani is below

Question 74

what is the cochlear duct filled with

Answer 74

endolymph

Question 75

what anchors the cochlear duct to the outer wall of the cochlea

Answer 75

the spiral ligmament

Question 76

what separates the scale vestibuli from the cochlear duct

Answer 76

the vestibular membrane

Question 77

what separates the scala tympani from the cochlear duct

Answer 77

the basilar or spiral membrane

Question 78

where is the spiral organ located

Answer 78

on the floor of the cochlear duct attached to the basilar/spiral membrane

Question 79

what is sensitive to frequency and amplitude of sound waves that enter the cochlea

Answer 79

numerous hair like projections of the spiral organ

Question 80

what are the hair like projections of the spiral organ covered by

Answer 80

the tectorial membrane

Question 81

how will information be conveyed from the hair like projections of the spiral organ

Answer 81

from receptor cells to primary sensory neurons

Question 82

the oval window being smaller than the tympanic membrane does what to the vibrations

Answer 82

amplifies them 17x

Question 83

LOOK AT THE TRANSMISSION OF SOUND DIAGRAM

Answer 83

DO IT

Question 84

what supplies blood to the labyrinth

Answer 84

``` internal auditor artery (B. of basilar A.) stylomastoid artery (B. from post. auricular A.) ```

Question 85

what gives sympathetic supply to the labyrinth

Answer 85

from cavernous and or internal carotid plexuses

Question 86

what is the nerve supply to the labyrinth

Answer 86

cochlear N. | vestibular N.

Question 87

where is information from the vestibular N. processed

Answer 87

the cerebellum

Question 88

what is the end target for information relayed in the cochlear nerve

Answer 88

brodmann areas 41 and 42 of the temporal lobe