Ears 1. Structure and functions of the ears 2 Structures of the ears External ear External ear...

Ears

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Structure and functions of the ears

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Structures of the ears External earExternal ear Middle earMiddle ear

Also known as the tympanic cavity

Inner earInner earAlso known as

the labyrinth

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Understanding the functions of the ear

External earExternal earPinnaPinnaExternal auditory External auditory canalcanal

Contains cerumenContains cerumenTympanic Tympanic membranemembrane

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Understanding the functions of the ear

Middle earMiddle ear

OssiclesOssicles Hammer or

malleus Anvil or incus Stirrup or stapes

Eustachian tubeEustachian tube

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Understanding the functions of the ear

Inner earInner ear

CochleaCochlea

Semicircular Semicircular canalscanals

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EarsReviewReview

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Understanding the functions of the ear

Pathway of Pathway of hearinghearingTrace the pathway Trace the pathway of hearing.of hearing.Discuss the process Discuss the process of hearing.of hearing.What are decibels?What are decibels?

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Understanding the functions of the ear

What is occurring at each structure?

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Review the

pathway of

hearing

Healthy Hearing

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How do you protect your hearing?What is the relevance to healthy hearing?

Understanding the functions of the ear

Sound ActivitySound Activity

What is a sound byte?What is a sound byte?

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Short bit of sound or clip from a Short bit of sound or clip from a longer recording. longer recording.

Disorders of the ear

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Disorders of the ear

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Disorders of the ear External otitis

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Discuss what you see in this picture? (Besides a Q-tip!)

What causes external otitis?

How can it be prevented?

Disorders of the earOtitis mediaOtitis mediaWhat is otitis media?What is otitis media?Who is most at Who is most at

risk of having risk of having

otitis media? Why?otitis media? Why?What are the treatment options?What are the treatment options?http://http://www.medicinenet.com/www.medicinenet.com/anatomy_of_an_ear_infection_anatomy_of_an_ear_infection_pictures_slideshow/article.htmpictures_slideshow/article.htm

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Disorders of the ear

OtosclerosisOtosclerosisWhat is it?What is it?

Oto- sclerosisOto- sclerosis

What causes it?What causes it?

Why is a stapedectomy useful Why is a stapedectomy useful in treating otosclerosis?in treating otosclerosis?

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Disorders of the ear

Meniere’s diseaseMeniere’s disease

What are the What are the symptoms of symptoms of Meniere’s disease?Meniere’s disease?

What causes these What causes these symptoms?symptoms?

How is it treated?How is it treated?

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Disorders of the ear

TinnitusTinnitusWhat 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.

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Disorders of the earPresbycusisPresbycusisWhat is What is presbycusis?presbycusis?

Who is most likely Who is most likely to develop to develop presbycusis?presbycusis?

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Testing for hearing losshttp://www.youtube.com/watch?v=7BQFKnP-7Qg

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Weber testRinne test

Compare these two tests. How are they diagnostic?

Structure, Functions and Disorders of the Ear

The EndThe End

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