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2MB ENT (The Directors Cut) > Ear Anatomy > Flashcards

Ear Anatomy Flashcards

1
Q

Pterion

A

H-shaped structure

  • frontal, parietal, temporal and sphenoid
  • thinnest part of skull
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2
Q

anterior cranial fossa

A

frontal, ethmoid, sphenoid

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3
Q

middle cranial fossa

A

sphenoid and tmeporal

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4
Q

posterior cranial fossa

A

tmeporal and occipital

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5
Q

External ear

A

collects and conveys sound waves to tympanic membrane

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6
Q

middle ear

A

amplifies and conducts sound waves to the internal ear

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7
Q

internal ear

A

converts special sensory information into fluid waves, then Action potentials, conducts APs to brain

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8
Q

Three parts of Auricle

A

Helix, Tragus + ear lobe

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9
Q

CNV3

A

superior parts of External acoustic meatus + most of tympanic membrane

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10
Q

C2,3

A

back of auricle and ear lobe

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11
Q

CNVII

A

lateral auricle

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12
Q

CNX

A

Parts of EAM + tympanic membrane

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13
Q

External ear skeleton

A

tmeporal bone + elastic cartilage

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14
Q

Produces earwax

A

ceruminous glands

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15
Q

Features of Tympanic Membrane

A 
Pars Flaccida (thin + superior)
Umbo (inward depressed)
Pars Tensa (thick + inferior)
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16
Q

Sensory Innervation of tympainc membrane

A 
External = CNV3
Internal = CNIX
17
Q

Ossicles

A

3 bones of middle ear (articulate via synovial joints):

  • Malleus
  • Incus
  • Stapes
18
Q

Connects middle ear cavity to nasopharynx

A

Eustachian Tube (sensory from CNIX e.g. tonsilitis referred pain earache)

19
Q

Branch of CNVII and taste buds of anterior 2/3rds of tongue

A

chorda tympani (connects to CNV3)

20
Q

cochlear =

A

hearing

21
Q

vestibular =

A

balance

22
Q

where does the otic capsule sit?

A

Temporal bone (surrounds the cochlea and semicircular canals)

23
Q

membranous labyrinth sits where?

A

inside bony labyrinth

24
Q

fluid that fills the bony labyrinth and floats the membranous labyrinth?

A

perilymph

25
Q

Where does CN VII + VIII connect with the brainstem?

A

Junction between pons and medulla oblongata

26
Q

Mastoiditis

A

spread of infection from middle ear cavity

2MB ENT (The Directors Cut) (16 decks)

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