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Anatomy > Clinical Anatomy of the Ear > Flashcards

Clinical Anatomy of the Ear Flashcards

1
Q

What is the pterion?

A

The thinnest part of the skull (H shaped)

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2
Q

What bones make up the pterion?

A

Frontal
Temporal
Parietal
Sphenoid

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3
Q

What nerves are contained within the temporal bone?

A

CN VII

CN VIII

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4
Q

Bones of the anterior cranial fossa?

A

Frontal
Ethmoid
Sphenoid

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5
Q

Bones of the middle cranial fossa?

A

Sphenoid

Temporal

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6
Q

Bones of the posterior cranial fossa?

A

Temporal

Occupital

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7
Q

What bone surround the external acoustic meatus?

A

Temporal bone

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8
Q

What glands of the ear produce ear wax?

A

Ceruminous glands

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9
Q

What nerve supplies the helix?

A

C2,3 spinal nerve

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10
Q

When examining a childs ear, what direction do you pull the pina?

A

Posterioriferiorly

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11
Q

When examining a adults ear, what direction do you pull the pinna?

A

Posteriorsuperiorly

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12
Q

What nerve supplies the external surface of the tympanic membrane?

A

CN V3

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13
Q

What nerve supplies the internal surface of the tympanic membrane?

A

CN IX

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14
Q

Where does the CN IX give sensory innervation to?

A 
Middle ear cavity 
Eustachian tube
Nasopharynx 
Oropharynx
Tonsils
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15
Q

The eustachian tube connects the _____ to the _____?

A

Tympanic cavity to the wall of the nasopharynx

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16
Q

Sensory nerve supply to the laryngopharynx?

A

CN X

17
Q

What are the three ossicles?

A

Malleus
Incus
Stapes

18
Q

What bone is at the opening of the oval window?

A

Base of stapes

19
Q

What is the Aditus?

A

Doorway into mastoid antrum from the epitympanic recess

20
Q

What does the facial nerve travel through out of the crainum?

A

Stylomastoid foramen

21
Q

What nerve supplies the anterior 2/3rds of the tongue?

A

Chorda Tympani (branch of the facial nerve)

22
Q

What nerve supplies the parotid and submandibular glands?

A

Chorda Tympani

23
Q

What is the Stapedius?

A

Small bone in the body, reduced stapes movement to protect the internal ear from excessive noise

24
Q

What does the CN V3 travel through out of the cranium?

A

Foramen ovale

25
Q

What nerve innervates the facial muscles?

A

CN VII

26
Q

What is the circular muscle around the mouth?

A

Obicularis oris

27
Q

What is the border around the mouth called?

A

Vermillion border

28
Q

What are the nerve within the inner ear and what is it composed of?

A

The Vestibulocochlear neve

i) Cochlear nerve (hearing)
ii) Vestibular nerve (balance)

29
Q

What contains the bony labyrinth?

A

Optic capsule

30
Q

What are the 3 semicircular canals?

A

Superior
Lateral
Posterior

31
Q

What fluid fills the bony larbyrinth?

A

Perilymph

32
Q

What lymph does the semicircular canals contain?

A

Endolymph

33
Q

What lymph does the cochlear duct contain?

A

Endolymph

34
Q

What tuning fork is used to examine hearing of the ear?

A

512 Hz

Anatomy (10 decks)

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