Download 3.03 Understand the sensory system

3.04 Functions and
disorders of the ear
3.04 Understand the functions and
disorders of the sensory system
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3.04 Understand the functions and
disorders of the sensory system
Essential Questions
• What are the functions of the sensory system?
• What are some disorders of the sensory system?
• How are sensory system disorders treated?
• How do you relate the body’s communication to
the sensory system?
3.04 Understand the functions and
disorders of the sensory system
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Understanding the
functions of the ear:
Hearing
3.04 Understand the functions and
disorders of the sensory system
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Understanding the
functions of the ear
External ear


Pinna
External auditory
canal


Contains cerumen
Tympanic
membrane
3.04 Understand the functions and
disorders of the sensory system
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Understanding the
functions of the ear
Middle ear

Ossicles

Eustachian
tube
3.04 Understand the functions and
disorders of the sensory system
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Understanding the
functions of the ear
Inner ear

Cochlea

Semicircular
canals
3.04 Understand the functions and
disorders of the sensory system
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Understanding the
functions of the ear
Pathway of
hearing



Trace the pathway
of hearing.
Discuss the process
of hearing.
What are decibels?
3.04 Understand the functions and
disorders of the sensory system
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Understanding
the
functions of
the ear
What is occurring at
each structure?
3.04 Understand the functions and
disorders of the sensory system
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Healthy Hearing
How do you protect your hearing?
What is the relevance to healthy hearing?
3.04 Understand the functions and
disorders of the sensory system
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Understanding the
functions of the ear
Sound Activity
What is a sound byte?
Short bit of sound or clip from a
longer recording.
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
External otitis- swimmers
ear
Discuss what you see in this
picture? (Besides a Q-tip!)
Drainage, redness
What causes external otitis?
Bacteria or fungi- from swimming
or from scratching ear with object
How can it be prevented? Dry ears
after swimming, no objects in ear.
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
Otitis media
What is otitis media? inflammation of
the inner ear usually caused by a blockage
of the Eustachian tube

Who is most at
risk of having
otitis media? Why? Children.. They
don’t blow their noses and build up of
fluid


What are the treatment options?
antibiotics, surgery
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
Otosclerosis

What is it?
 Oto- sclerosis

Ear- hardening due to abnormal bone
growth in the ear

What causes it? Not sure but heredity
has been found

Why is a stapedectomy useful in
treating otosclerosis? Replace
with proper working device
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
Meniere’s disease

What are the
symptoms of
Meniere’s disease?

What causes these
symptoms?

How is it treated?
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
Tinnitus

What is tinnitus? Ringing in
the ears
Explain this statement:
Tinnitus is a symptom,
not a disorder.
3.04 Understand the functions and
disorders of the sensory system
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Disorders of the ear
Presbycusis

What is
presbycusis?
Hearing loss due to
aging process

Who is most likely
to develop
presbycusis?
elderly
3.04 Understand the functions and
disorders of the sensory system
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Testing for hearing loss
Rinne test
Weber test
Compare these two tests.
How are they diagnostic?
3.04 Understand the functions and
disorders of the sensory system
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3.04 Understand the functions and
disorders of the sensory system
Essential Questions
• What are the functions of the sensory system?
• What are some disorders of the sensory system?
• How are sensory system disorders treated?
• How do you relate the body’s communication to
the sensory system?
3.04 Understand the functions and
disorders of the sensory system
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3.04 Functions and
disorders of the ear
The End
3.04 Understand the functions and
disorders of the sensory system
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