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ENT > Ear anatomy > Flashcards

Ear anatomy Flashcards

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
Q

What nerve supplies the internal surface of the tympanic membrane?

A

Glossopharyngeal nerve (CN IX)

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26
Q

What two structures does the eustachian tube connect?

A

The tympanic cavity to the lateral wall of the nasopharynx

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27
Q

What nerve supplies the middle ear cavity, the eustachian tube, nasopharynx, oropharynx and the tonsils?

A

Glossopharyngeal nerve

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28
Q
A

The handle of the malleus

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29
Q
A

Incus

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30
Q
A

Stapes

31
Q
A

Eustachian/auditory tube

32
Q
A

Eustachian tube

33
Q
A

Eustachian tube

34
Q

Is the eustachian tube normally open or closed?

A

Closed. It opens monentarily when we swallow

35
Q

What is the arrow pointing to and what bone sits here?

A

The oval window. The base of the stapes

36
Q
A
37
Q

What kind of joints are between the ossicles?

A

Synovial joints

38
Q

Where does the oval window lead to?

A

The internal ear

39
Q

What cavity does the eustachian tube arise from?

A

Middle ear cavity

40
Q
A

The round window

41
Q

What is this and what nerve runs through it?

A

Facial canal. Facial nerve

42
Q
A

Mastoid air cells

43
Q

What is teh function of the aditus?

A

A doorway into the right mastoid antrum from the epitympanic recess

44
Q

What part of which bone does this show?

A

Mastoid process of the right temporal bone

45
Q
A

Stapes

46
Q

What is the smallest bone in the body?

A

Stapes

47
Q
A

Tendon of stapedius

48
Q
A

Incus

49
Q
A

Malleus (handle)

50
Q

What muscle restrains movement of the stapes?

A

Stapedius

51
Q

What muscle restrains movement of the malleus

A

Tensor tympani

52
Q
A

Tendon of the tensor tympani muscle

53
Q

Which nerve is this?

A

Corda tympani

54
Q

What nerve is the chorda tympani a branch of?

A

Facial nerve

55
Q

What is the central chamber of the bony labyrinth of the internal ear called?

A

The vestibule

56
Q

What nerve supplies most of the internal ear?

A

The Vestibulocochlear nerve (CN VIII)

57
Q

What is perilymph?

A

A fluid that fills the bony labyrinth. The membranous labyrinth floats in ths.

58
Q

How many sense organs are there for balance. Where are they all?

A

2 are in the vestibule

1 in each of the three semi circular canals (in the ampulla)

59
Q

What fluid lies inside the membranous labyrinth?

A

Endolymph

60
Q

What are the semi circular ducts?

A

Inter linked balloon like structures within the semi circular canals filled with endolymph

61
Q

What nerve conducts action potentials fromm the semicircular ducts?

A

Vestibular nerve

62
Q

What nerve conducts APs to the brainstem from the cochlear duct?

A

Cochlear nerve

63
Q

Where do cranial nerve 7 (facial) and 8 (vestibulocochlear) connect with the brainstem?

A

The junction netween the pons and the medulla oblongata

64
Q

What does the chorda tympani nerve supply?

A

Taste buds on anterior tongue

Parasympathetic supply to submandibular and sublingual salivary glands

65
Q

What does the facial canal connect?

A

The internal acoustic meatus to the stylomastoid foramen

66
Q
A
67
Q

What nerves are these?

A

Facial nerves

68
Q

Whereabouts does the facial nerve divide into the somatic motor branches for the muscles of facial expression?

A

Within the parotid salivary gland

69
Q
A
70
Q
A
71
Q

What does the middle ear communicate with superiorly?

A

The mastoid air cells

72
Q

What nerve lies across the medial wall of the middle ear cavity?

A

Facial

73
Q
A

ENT (13 decks)

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