Brainscape's Knowledge GenomeTM

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


See full index

Macroanatomy > Ear > Flashcards

Ear Flashcards

1
Q

What are the divisions of the ear

A

External middle and inner

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

What structures make up the external ear

A

Pinna and ear canal

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

What are the functions of the ear

A

Hearing and balance

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

What is the tympanic membrane

A

Eardrum

Covers the opening in the temporal bone of the skull

Thin semitransparent wall between ear canal and middle ear that vibrates from sound waves

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

What is the function of the cutaneous marginal pouch on the external pinna of the ear

A

Helps to capture sound

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

Where is the auricular cartilage

A

On the pinna

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

Where is the annular cartilage

A

Ear canal

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

What is the external acoustic meatus

A

Opening to the temporal bone

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

What is the middle ear

A

Small air filled space lined with mucus membrane (tympanic cavity) with three regions

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

What are the three regions of the middle ear

A

Epitympanic recess
Tympanic cavity proper
Tympanic bulla

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

What is the epitympanic recess of the middle ear

A

Houses the auditory ossicles (small bones) that transmit and amplify sound from the tympanic membrane to the window causing vibrations in the fluid of the cochlea

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

What are the three auditory ossicles

A

Malleus
Incus
Stapes

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

What muscles attach the ossicles and provide tension on the tympanic membrane

A

Tensor tympanic and stapedius

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

What is the tympanic cavity proper of the middle ear and what
is it’s function

A

Houses the auditory tube

equalize pressure on both sides of tympanic membrane

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

What is the promontory

A

A rounded hallow eminence over the cochlea

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

What is the tympanic bulla

A

portion of the middle ear that aids in perception of sound

17
Q

Where is the inner ear in relation to the skull

A

Housed in the hard petrous temporal bone

18
Q

What is the function of the inner ear

A

Mechanical energy is transformed into nerve impulses

19
Q

What makes up the inner ear

A

Membranous labyrinth enclosed by bony labyrinth

20
Q

What are the fluids of the inner ear

A

Perilymph and endolymph

21
Q

What is the membranous labyrinth

A

A series of ducts and chambers containing endolymph and surrounded by perilymph

Two sacs: utricle and saccule

22
Q

What is the function of the utricle and saccule sacs

A

Utricle aids in balance
saccule aids in hearing

23
Q

What is the bony labyrinth

A

Surrounds the membranous labyrinth

Consists of the vestibule (houses saccule and utricle), the cochlea and the semicircular canals

24
Q

What lines the bony labyrinth

A

Periosteum

25
Q

What are the two openings to the vestibule of the inner ear

A

Round window (cochlear) and oval window (vestibular)

26
Q

What are the two channels or ducts of the vestibule of the inner ear

A

Vestibular aqueduct and cochlear aqueduct

27
Q

What is housed by
semicircular canals of the inner ear

A

Houses membranous ducts

28
Q

What is the cochlea

A

Snail like structure of the inner ear associated with hearing (bony outer coil and inner membrane cochlear duct)

29
Q

What nerve innervates the ear

A

Vestibulocochlear nerve (CN VIII)
- vestibular branch for balance
- cochlear branch for hearing

30
Q

What innervates the tympanic membrane

A

Glossopharyngeal nerve (CN IX)

31
Q

What structures are involved with balance

A

Utricle saccule and semicircular ducts

32
Q

What structure are involved with hearing

A

Saccule and cochlear duct

33
Q

How are we able to hear and interpret sound

A

External ear collect mechanical sound and funnels it down auditory canal

Tympanic membrane vibrates

Transmitted to ossicles (20x amplified)

Stapes touched vestibular window and transmits to inner ear

Inner ear turns to nerve impulses

Sound wave to perilymph enters cochlear duct and impose on the membrane

Hair cells vibrate to make electrical impulses

Nerve impulses travel to cochlear nerve to brain

34
Q

Why can problems with the ear cause other facial problems?

A

The facial nerve is in close proximity to the middle ear (ataxia, horners syndrome, paralysis)

35
Q

Where are the utricle and saccule found

A

Middle ear

Macroanatomy (7 decks)

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