Ears - Anatomy Flashcards by Izzy Burns

Q

What are the 2 parts of the external ear

A

Pinna

EAM

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Q

Where does the external ear extend between

A

Pinna –> TM

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Q

Composition of external 1/3 of EAM

A

Cartilage

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Q

Composition of inner 2/3 of EAM

A

Temporal bone

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Q

Where is the cone of light on the tympanic membrane?

A

Anteroinferiorly

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Q

Function of external ear (3)

A

Sound amplication
Cosmesis
Protect TM

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Q

Where does the middle ear extend between?

A

TM to oval window

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Q

Function middle ear

A

Sound/energy transformer

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Q

What are the 2 parts of the middle ear

A

Epitympanic recess

Tympanic cavity

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Q

What is in the tympanic cavity

A

Ossicles

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Q

Where is the epitympanic recess

A

Space above osssicles

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Q

What is in the epitympanic recess

A

Mastoid air cells

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Q

Function mastoid air cells

A

P regulation

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Q

Which ossicles is connected to the oval window

A

Stapes

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Q

What does the eustachian tube connect?

A

Middle ear to nasopharynx

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Q

Fct eustachian tube

A

Equalise pressure

Q

Fct inner ear

A

Hearing and balance

Q

What are the 3 constituents of the bony labyrinth

A

Vestibule
Cochlear
SC canals

Q

What is the vestibule responsible for?

A

Balance

Q

Saccule fct

A

Horizontal movement

Q

Utricle fct

A

Vertical movement

Q

What is the cochlea responsible for?

A

Auditory

Q

What are the semi-circular canals responsible for?

A

Rotational movement

Q

What is the membranous labyrinth

A

System of ducts filled w/ endolymph

Q

What is the membranous labyrinth surrounded by

A

peri-lymph