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3.04 Functions and disorders of the ear

3.04 Functions and disorders of the ear. 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?

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3.04 Functions and disorders of the ear

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  1. 3.04 Functions and disorders of the ear 3.04 Understand the functions and disorders of the sensory system

  2. 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

  3. Understanding the functions of the ear: Hearing 3.04 Understand the functions and disorders of the sensory system

  4. Understanding the functions of the ear External ear • Pinna • External auditory canal • Contains cerumen- protects the ear by trapping foreign substances • Tympanic membrane- Protects the inner ear organs 3.04 Understand the functions and disorders of the sensory system

  5. Understanding the functions of the ear Middle ear Ossicles- Three tiny bones that transmit sound waves from the ear drum to the inner ear Eustachian tube- serves to equalize air pressure in the middle ear with the outside atmosphere 3.04 Understand the functions and disorders of the sensory system

  6. Understanding the functions of the ear Inner ear Cochlea- Special organ of hearing Semicircular canals-Contain fluid that vibrates when the sound waves from the stirrup bone strike against it. 3.04 Understand the functions and disorders of the sensory system

  7. Understanding the functions of the ear Pathway of hearing • Trace the pathway of hearing. • Sound> pinna> auditory canal>tympanic membrane> ossicles>cochlea>cochlear nerve>temporal lobe • What are decibels? The measure of sound. 3.04 Understand the functions and disorders of the sensory system

  8. Understanding the functions of the ear Review the pathway of hearing 3.04 Understand the functions and disorders of the sensory system

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

  10. Disorders of the ear 3.04 Understand the functions and disorders of the sensory system

  11. Disorders of the ear What instruments are used to examine the ear? Otoscope What specialist studies the ears, nose, and throat? Otolaryngologist 3.04 Understand the functions and disorders of the sensory system

  12. Disorders of the ear External otitis Discuss what you see in this picture? (Besides a Q-tip!) What causes external otitis? Commonly called “swimmers ear”. An infection caused by bacteria and fungi. Commonly contracted from contaminated swimming pools and beaches. How can it be prevented? Clean and dry external ear after swimming or wear ear plugs. 3.04 Understand the functions and disorders of the sensory system

  13. Disorders of the ear Normal tympanic membrane Otitis media Myringotomy Otitis media What is otitis media? Acute infection of the middle ear Who is most at risk of having otitis media? Why? Infants and young children because of their immature Eustacian tubes What are the treatment options? Antibiotics first, but if chronic, doctors may perform a myringotomy (tubes) into the tympanic membrane 3.04 Understand the functions and disorders of the sensory system

  14. Disorders of the ear Otosclerosis • What is it? • Oto- sclerosis • What causes it? Excess bone growth in the middle ear • How do they treat it? Stapedectomy- Stapes is removed and replaced with plastic or wire substitute 3.04 Understand the functions and disorders of the sensory system

  15. Disorders of the ear Meniere’s disease What are the symptoms of Meniere’s disease? Dizziness (vertigo) What causes these symptoms? The semicircular canals are affected, resulting in dizziness How is it treated? Medications, relieve stress 3.04 Understand the functions and disorders of the sensory system

  16. Disorders of the ear Tinnitus • What is tinnitus? Ringing of the ears Explain this statement: Tinnitus is a symptom, not a disorder. 3.04 Understand the functions and disorders of the sensory system

  17. Disorders of the ear Presbycusis What is presbycusis? Deafness Who is most likely to develop presbycusis? Older people Conductive hearing loss: When sounds are blocked by ear wax or fluid in the middle ear or abnormal bone growth Sensory hearing loss: From damage to parts of the inner ear or auditory nerve. 3.04 Understand the functions and disorders of the sensory system

  18. Testing for hearing loss Rinne test Weber test 3.04 Understand the functions and disorders of the sensory system

  19. 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

  20. 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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