Ears
1
Structure and
functions of the ears
2
Structures of the ears
 External
ear
 Middle ear
 Also known
as the
tympanic
cavity
 Inner ear
 Also known
as the
labyrinth
3
Understanding the
functions of the ear
External ear


Pinna
External auditory
canal


Contains cerumen
Tympanic
membrane
4
Understanding the
functions of the ear
Middle ear
Ossicles



Hammer or
malleus
Anvil or incus
Stirrup or stapes
Eustachian
tube
5
Understanding the
functions of the ear
Inner ear

Cochlea

Semicircular
canals
6
Ears
Name the structures…
 Review
7
Understanding the
functions of the ear
Pathway of
hearing



Trace the pathway
of hearing.
Discuss the process
of hearing.
What are decibels?
8
Understanding
the
functions of
the ear
What is occurring at
each structure?
9
Healthy Hearing
How do you protect your hearing?
What is the relevance to healthy hearing?
10
Understanding the
functions of the ear
Sound Activity
What is a sound byte?
Short bit of sound or clip from a
longer recording.
11
Disorders of the ear
12
Disorders of the ear
13
Disorders of the ear
External otitis
Discuss what you see in
this picture? (Besides a Q-tip!)
What causes external otitis?
How can it be prevented?
14
Disorders of the ear
Otitis media
What
is otitis media?
Who is most at
risk of having
otitis media? Why?
What are the treatment
options?
http://www.medicinen
et.com/anatomy_of_an_
ear_infection_pictures_s
lideshow/article.htm
15
Disorders of the ear
Otosclerosis

What is it?
 Oto- sclerosis

What causes it?

Why is a stapedectomy
useful in treating
otosclerosis?
16
Disorders of the ear
Meniere’s disease

What are the
symptoms of
Meniere’s disease?

What causes these
symptoms?

How is it treated?
17
Disorders of the ear
Tinnitus

What is tinnitus?
Explain this statement:
Tinnitus is a symptom,
not a disorder.
18
Disorders of the ear
Presbycusis

What is
presbycusis?

Who is most likely
to develop
presbycusis?
19
Testing for hearing loss
http://www.youtube.com/watch?v=7
BQFKnP-7Qg
Rinne test
Weber test
Compare these two tests.
How are they diagnostic?
20
Structure, Functions and
Disorders of the Ear
The End
21