Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Head and Neck Anatomy BDS3 > The Ear > Flashcards

The Ear Flashcards

1
Q

what bone houses the vistibulocochlear apparatus

A

petrous part of temporal bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what two cranial nerves exit the skull through the internal acoustic meatus

A

CN VII and VIII

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what emerges through the stylomastoid foramen

A

the facial nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the three broad areas of the ear

A

external
middle
inner

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what does the tympanic membrane separate

A

external ear from middle ear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what does the pharyngotympanic tube join

A

the middle ear to the nasopharynx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the function of the external ear

A

leads sound waves to tympanic membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is the function of the middle ear

A

contains ossicles which mechanically transmit sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the function of the inner ear

A

contains semi-circular canals and cochlea which convert the mechanical signals to electrical signals carried by CN VIII to the brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what aspect of the external ear does the great auricular nerve supply

A

the medial surface, back of ear and helix and lobules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what part of the external ear does the auriculotemporal nerve supply

A

tragus and crus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what comprises the external acoustic meatus

A

lateral cartilagenous 1/3 and bony medial 2/3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what epithelium is present in the external acoustic meatus

A

stratified squamous epithelium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what glands are present in the external acoustic meatus

A

ceruminous glands

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is the function of the ceruminous glands

A

secretes earwax to keep foreign bodies away from tympanic membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the tympanic membrane held to the temporal bone by

A

fibrocartilaginous ring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is the umbo of the tympanic membrane

A

the peak

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the cone of light

A

caused by light of the otoscope which is characteristic of a healthy middle ear as there is no fluid accumulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what is the middle ear

A

air filled chamber in petrous part of temporal bone which contains ossicles and two muscles

20
Q

what two muscles are contained in the middle ear

A

tensor tympani and stapedius

21
Q

what are ossicles

A

chain of mobile small bones

22
Q

what is the maleus attached to

A

tympanic membrane

23
Q

what are the three ossicles

A

maleus
incus
stapes

24
Q

what is the structure of the stapes

A

kind of looks like a ring

25
Q

what is the function of the ossicles

A

to increase force and decrease amplitude of vibrations from tympanic membrane

26
Q

what is the function of the tensor tympani

A

dampens movement of tympanic membrane to protect ear from loud sounds

27
Q

what is the function of the stapedius

A

dampens or resists movement of ossicles

28
Q

innervation of tensor tympani

A

CN V3

29
Q

innervation of stapedius

A

CN VII

30
Q

what is the function of the auditory tube

A

pressure equalisation between middle ear and atmospheric pressure

31
Q

what is a potential clinical consideration of the internal acoustic meatus

A

this is where CN VII and VIII exit and there can be a Schwonnoma here which could require surgery

32
Q

what does the CN VII give off when it passes through the middle ear

A

greater petrosal nerve

33
Q

what is the role of the greater petrosal nerve

A

carries parasympathetic fibres to pterygopalatine ganglion

34
Q

what nerve is given off just before CN VII exits via the stylomastoid foramen

A

chorda tympani

35
Q

what two blood vessels run proximal to the middle ear

A

internal carotid artery
internal jugular vein

36
Q

where does the chorda tympani travel in relation to the tympanic membrane

A

travels deep to the upper portion of tympanic membrane

37
Q

what does the mastoid antrum connect

A

the mastoid process and middle ear

38
Q

what is conductive deafness

A

where there is an issue with transmission of the sound (mechanically) via the ossicles - NOT the nerve

39
Q

where is the vestibulocochlear organ housed

A

inner ear

40
Q

what is the bony labyrinth of the inner ear

A

semi-circular canals, cochlea and vestibule

41
Q

what fluid is contained in the bony labyrinth

A

perilymph and endolymph

42
Q

where does the CN VIII split into the vestibular and cochlear parts

A

after exiting the internal acoustic meatus

43
Q

where does the cochlear part of CN VIII travel to

A

travels to the cochlea

44
Q

where does the vestibular part of CN VIII travel to

A

semicircular canals

45
Q

function of cochlear part

A

hearing

46
Q

function of vestibular part

A

balance

Head and Neck Anatomy BDS3 (22 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions