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Ear anatomy Flashcards

(73 cards)

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1
Q

What part of which bone is the arrow pointing to?

A

Squamous part of the temporal bone

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2
Q

Which part of the temporal bone contains the structures of the inner and middle ear?

A

The petrous part

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3
Q

Which part of which bone is this arrow pointing to?

A

Petrous part of the temporal bone

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4
Q

What is the arrow pointing to?

A

Jugular foramen

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5
Q

There is a groove that site behind the jugular foramen. What is it for?

A

The sigmoid sinus

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6
Q

What is the main venous drainage channel for the brain?

A

The sigmoid sinus

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7
Q

What is the arrow pointing to? What runs through this?

A

The hypoglossal canal. The hypoglossal nerve

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8
Q

What travels through the internal auditroy meatus?

A

Vestibucochlear and facial nerves

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9
Q
A

External auditory meatus

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10
Q

What is the folded outer limb of the auricle called?

A

The helix

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11
Q
A

Tragus

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12
Q

What kind of cartilage in the auricle made up of?

A

Elastic

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13
Q

Where does the external auditory meatus end?

A

Tympanic membrane

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14
Q
A

External auditory meatus

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15
Q
A

Helix

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16
Q
A

Tympanic membrane

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17
Q

What part of the tympanic membrane is this showing?

A

Pars flaccida

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18
Q
A
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19
Q

Whta part of the tympanic membrane doe sthis image show?

A

Pars tense

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20
Q

What does this image show (be specific)

A

Handle of the malleus

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21
Q

Describe the path of lymph drainage from the right auricle

A

Parotid (pre auricular nodes)

Mastoid (post auricular) nodes

Deep cervical nodes

Thoracic duc or right lymphatic duct

Rigth venous angle

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22
Q

What is the most inwardly depressed part of the tympanic membrane called?

A

The umbo

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23
Q

What is this part of the tympanic membrane called and what attaches here?

A

The umbo. The handle of the malleus

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24
Q

What nerve gives sensory supply to the external surface of the tympanic membrane?

A

Trigeminal nerve (CNV)

Specifically, CNV3; the auriculotemporal branch

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25
What nerve supplies the internal surface of the tympanic membrane?
Glossopharyngeal nerve (CN IX)
26
What two structures does the eustachian tube connect?
The tympanic cavity to the lateral wall of the nasopharynx
27
What nerve supplies the middle ear cavity, the eustachian tube, nasopharynx, oropharynx and the tonsils?
Glossopharyngeal nerve
28
The handle of the malleus
29
Incus
30
Stapes
31
Eustachian/auditory tube
32
Eustachian tube
33
Eustachian tube
34
Is the eustachian tube normally open or closed?
Closed. It opens monentarily when we swallow
35
What is the arrow pointing to and what bone sits here?
The oval window. The base of the stapes
36
37
What kind of joints are between the ossicles?
Synovial joints
38
Where does the oval window lead to?
The internal ear
39
What cavity does the eustachian tube arise from?
Middle ear cavity
40
The round window
41
What is this and what nerve runs through it?
Facial canal. Facial nerve
42
Mastoid air cells
43
What is teh function of the aditus?
A doorway into the right mastoid antrum from the epitympanic recess
44
What part of which bone does this show?
Mastoid process of the right temporal bone
45
Stapes
46
What is the smallest bone in the body?
Stapes
47
Tendon of stapedius
48
Incus
49
Malleus (handle)
50
What muscle restrains movement of the stapes?
Stapedius
51
What muscle restrains movement of the malleus
Tensor tympani
52
Tendon of the tensor tympani muscle
53
Which nerve is this?
Corda tympani
54
What nerve is the chorda tympani a branch of?
Facial nerve
55
What is the central chamber of the bony labyrinth of the internal ear called?
The vestibule
56
What nerve supplies most of the internal ear?
The Vestibulocochlear nerve (CN VIII)
57
What is perilymph?
A fluid that fills the bony labyrinth. The membranous labyrinth floats in ths.
58
How many sense organs are there for balance. Where are they all?
5. 2 are in the vestibule 1 in each of the three semi circular canals (in the ampulla)
59
What fluid lies inside the membranous labyrinth?
Endolymph
60
What are the semi circular ducts?
Inter linked balloon like structures within the semi circular canals filled with endolymph
61
What nerve conducts action potentials fromm the semicircular ducts?
Vestibular nerve
62
What nerve conducts APs to the brainstem from the cochlear duct?
Cochlear nerve
63
Where do cranial nerve 7 (facial) and 8 (vestibulocochlear) connect with the brainstem?
The junction netween the pons and the medulla oblongata
64
What does the chorda tympani nerve supply?
Taste buds on anterior tongue Parasympathetic supply to submandibular and sublingual salivary glands
65
What does the facial canal connect?
The internal acoustic meatus to the stylomastoid foramen
66
67
What nerves are these?
Facial nerves
68
Whereabouts does the facial nerve divide into the somatic motor branches for the muscles of facial expression?
Within the parotid salivary gland
69
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71
What does the middle ear communicate with superiorly?
The mastoid air cells
72
What nerve lies across the medial wall of the middle ear cavity?
Facial
73

ENT (13 decks)

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