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

2. 2 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 3

4. Understanding the functions of the ear External ear Pinna Pinna External auditory canal External auditory canal  Contains cerumen Tympanic membrane Tympanic membrane 3.04 Understand the functions and disorders of the sensory system 4

5. Understanding the functions of the ear Middle ear Ossicles Ossicles Eustachian tube Eustachian tube 3.04 Understand the functions and disorders of the sensory system 5

6. Understanding the functions of the ear Inner ear Cochlea Cochlea Semicircular canals Semicircular canals 3.04 Understand the functions and disorders of the sensory system 6

7. Understanding the functions of the ear Pathway of hearing Trace the pathway of hearing. Trace the pathway of hearing. Discuss the process of hearing. Discuss the process of hearing. What are decibels? What are decibels? 3.04 Understand the functions and disorders of the sensory system 7

8. Understanding the functions of the ear What is occurring at each structure? 3.04 Understand the functions and disorders of the sensory system 8 Review the pathway of hearing

9. Healthy Hearing 3.04 Understand the functions and disorders of the sensory system 9 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? 3.04 Understand the functions and disorders of the sensory system 10 Short bit of sound or clip from a longer recording.

11. Disorders of the ear 3.04 Understand the functions and disorders of the sensory system 11

12. Disorders of the ear 3.04 Understand the functions and disorders of the sensory system 12

13. Disorders of the ear External otitis- swimmers ear 3.04 Understand the functions and disorders of the sensory system 13 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.

14. Disorders of the ear Otitis media What is otitis media? inflammation of the inner ear usually caused by a blockage of the Eustachian tube What is otitis media? inflammation of the inner ear usually caused by a blockage of the Eustachian tube Who is most at 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 What are the treatment options? antibiotics, surgery 3.04 Understand the functions and disorders of the sensory system 14

15. Disorders of the ear Otosclerosis What is it? What is it?  Oto- sclerosis Ear- hardening due to abnormal bone growth in the ear Ear- hardening due to abnormal bone growth in the ear What causes it? Not sure but heredity has been found What causes it? Not sure but heredity has been found Why is a stapedectomy useful in treating otosclerosis? Replace with proper working device Why is a stapedectomy useful in treating otosclerosis? Replace with proper working device 3.04 Understand the functions and disorders of the sensory system 15

16. Disorders of the ear Meniere’s disease What are the symptoms of Meniere’s disease? What are the symptoms of Meniere’s disease? What causes these symptoms? What causes these symptoms? How is it treated? How is it treated? 3.04 Understand the functions and disorders of the sensory system 16

17. Disorders of the ear Tinnitus What is tinnitus? Ringing in the ears 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 17

18. Disorders of the ear Presbycusis What is presbycusis? Hearing loss due to aging process What is presbycusis? Hearing loss due to aging process Who is most likely to develop presbycusis? elderly Who is most likely to develop presbycusis? elderly 3.04 Understand the functions and disorders of the sensory system 18

19. Testing for hearing loss 3.04 Understand the functions and disorders of the sensory system 19 Weber test Rinne test Compare these two tests. How are they diagnostic?

20. 3.04 Understand the functions and disorders of the sensory system 20 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 End 3.04 Understand the functions and disorders of the sensory system 21