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78 Multiple choice questions

  1. stiffens ossicular chain and tympanic membrane
  2. facial nerve
  3. tactile stimulation
  4. decreases amount of sound passed to inner ear
  5. tympanic membrane
  6. 25 dB of sound
  7. malleus head and incus
  8. it pullls footplate of stapes out of oval window, and draws stapes toward posterior wall of the middle ear
  9. sandwiched bw lateral and medial layer
  10. outer ear and inner ear
  11. stapedius
    tensor tympani
  12. umbo
  13. lateral part; posterior wall; anterior; behind
  14. closed
  15. 100 Hz and 2000 Hz to 2500 Hz
  16. carries special sensory fibers for taste for anteriro 2/3 of tongue
  17. tympanic cavity
  18. annulus
  19. perpendicular to EAC
  20. epithelial cells
  21. stirrum
  22. areal ratio of tympanic membrane to stapes footplate
  23. -impedence matching function
    -protection of inner ear structures
  24. above eustachian tube opening
  25. yawning, swallowing, chewing
  26. 85% of surface area has all 3 layrs
  27. primitive club/mallet
  28. basal turn of cochlea
  29. inward
  30. pump handle
  31. CN V trigeminal
  32. mastoid air cells
  33. medially; applies tension
  34. connects middle ear to nasopharyngeal cavity
  35. provides pivot point during bibration
  36. amplification of sound to comepnsate for loss of sound energy when going from air to fluid medium
  37. -protect inner ear from loud sounds
    -tune ear to respond to speech frequencies
    -dampen internal headsounds (chewing, person's own voice)
  38. irregularly shaped, tall and narro
  39. parallel to EAC
  40. mucosal lining of middle ear space
  41. circular
  42. fluid
  43. force cancelled at relatively large tempanic membrane, then concentrated on small area of oval window (stapes footplate), results in increased sound pressure into inner ear
  44. below oval window; covered by flexible membrane
  45. fibrous connective
  46. 15% of surface area; fibers are missing
  47. incus
  48. 1.5 in
  49. footplate
  50. pearly gray
  51. head of staps
  52. -equalizes air pressure in middle ear to outer ear pressure
    -ventilation of middle ear cavity
    -oxygen is absorbed by mucous and blood vessels
    -drainage of middle ear secretions to prevent reflux of fluid back/up into middle ear space
  53. ligaments
  54. tensor veli paletini
  55. CN7 facial nerve
  56. stapes
  57. pars flaccida
    pars tensa
    malleus (lateral process & manubrium)
    cone of light
    annulus
    umbo
    long process of incus
  58. external auditory canal
  59. pars tensa
  60. annular ligament
  61. attic
    -extends beyond superior border of TM
  62. 2 dB
  63. 17
  64. anterior
  65. upper end of malleus handle
  66. provide connection bw tympanic membrane and oval window
  67. boundary bw middle and inner ear; holds footplate of stapes
  68. 3.2 smm
  69. sound traveling from medium of low impedance (air of outer ear canal) to medium of high impedance (cochlear fluid) gets amplified thanks to lvl of action of ossicles and difference in area bw tympanic membane and oval window
  70. middle ear space
  71. oval window
  72. reflexively
  73. stapedius
  74. incus
  75. ossicles
    -malleus
    -incus
    -stapes
  76. maniubrum
  77. located bw windows
    -bony ridge
  78. attenuates low frequencies