The document discusses the functions and disorders of the ear and sensory system. It begins by reviewing the anatomy and functions of the external, middle, and inner ear. It then discusses common ear disorders like otitis media, otosclerosis, Meniere's disease, tinnitus, and presbycusis. The document concludes by reviewing tests for hearing loss like the Weber test and Rinne test.

1. 3.04 Functions and
disorders of the ear
3.04 Understand the functions and
disorders of the sensory system
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2. 3.04 Understand the functions and
disorders of the sensory system
3.04 Understand the functions and
disorders of the sensory system
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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. Understanding the
functions of the ear:
Hearing
3.04 Understand the functions and
disorders of the sensory system
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4. Understanding the
functions of the ear
External earExternal ear
Pinna/AuriclePinna/Auricle
External auditoryExternal auditory
canalcanal
 Contains cerumenContains cerumen
TympanicTympanic
membranemembrane
3.04 Understand the functions and
disorders of the sensory system
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5. Understanding the
functions of the ear
Middle earMiddle ear
OssiclesOssicles
 MalleusMalleus
 IncusIncus
 StapesStapes
EustachianEustachian
tubetube
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disorders of the sensory system
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6. Understanding the
functions of the ear
Inner earInner ear
CochleaCochlea
SemicircularSemicircular
canalscanals
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disorders of the sensory system
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7. Understanding the
functions of the ear
Pathway ofPathway of
hearinghearing
Trace the pathwayTrace the pathway
of hearing.of hearing.
What are decibels?What are decibels?
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disorders of the sensory system
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8. Understanding
the
functions of
the ear
3.04 Understand the functions and
disorders of the sensory system
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Review the
pathway of
hearing

9. Healthy Hearing
3.04 Understand the functions and
disorders of the sensory system
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How do you protect your hearing?

10. Understanding the
functions of the ear
Sound ActivitySound Activity
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disorders of the sensory system
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11. Disorders of the ear
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disorders of the sensory system
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12. Disorders of the ear
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disorders of the sensory system
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13. Disorders of the ear
External otitis
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disorders of the sensory system
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Discuss what you see in
this picture? (Besides a Q-tip!)
What causes external otitis?

14. Disorders of the ear
Otitis mediaOtitis media
What is otitis media?What is otitis media?
Who is most atWho is most at
risk of havingrisk of having
otitis media? Why?otitis media? Why?
What are the treatmentWhat are the treatment
options?options?
3.04 Understand the functions and
disorders of the sensory system
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15. Disorders of the ear
OtosclerosisOtosclerosis
What is it?What is it?
 Oto- sclerosisOto- sclerosis
What causes it?What causes it?
Why is a stapedectomyWhy is a stapedectomy
useful in treatinguseful in treating
otosclerosis?otosclerosis?
3.04 Understand the functions and
disorders of the sensory system
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16. Disorders of the ear
Meniere’s diseaseMeniere’s disease
What are theWhat are the
symptoms ofsymptoms of
Meniere’s disease?Meniere’s disease?
What causes theseWhat causes these
symptoms?symptoms?
How is it treated?How is it treated?
3.04 Understand the functions and
disorders of the sensory system
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17. Disorders of the ear
TinnitusTinnitus
What is tinnitus?What is tinnitus?
Explain this statement:Explain this statement:
Tinnitus is a symptom,Tinnitus is a symptom,
not a disorder.not a disorder.
3.04 Understand the functions and
disorders of the sensory system
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18. Disorders of the ear
PresbycusisPresbycusis
What isWhat is
presbycusis?presbycusis?
Who is most likelyWho is most likely
to developto develop
presbycusis?presbycusis?
3.04 Understand the functions and
disorders of the sensory system
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19. Testing for hearing loss
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disorders of the sensory system
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Weber test
Rinne test
Compare these two tests.
How are they diagnostic?

20. 3.04 Understand the functions and
disorders of the sensory system
3.04 Understand the functions and
disorders of the sensory system
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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?

21. 3.04 Functions and
disorders of the ear
The EndThe End
3.04 Understand the functions and
disorders of the sensory system
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