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78 True/False questions

  1. contraction of tensor tympani and stapediusit pullls footplate of stapes out of oval window, and draws stapes toward posterior wall of the middle ear

          

  2. the core layer has tough _______ ____ tissuefibrous connective

          

  3. decreasing amount of sound passed to inner earfluid

          

  4. stapes resembles astirrum

          

  5. function of eustachain tubecarries special sensory fibers for taste for anteriro 2/3 of tongue

          

  6. TM is attache to bony wall of ear canal by ____inward

          

  7. malleus' handle is calledprimitive club/mallet

          

  8. malleus is shaped likeprimitive club/mallet

          

  9. describe impedeance matching functionsound 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

          

  10. amplification in middle ear occurs fro frequencies bw100 Hz and 2000 Hz to 2500 Hz

          

  11. tympanic membrane landmarkspars flaccida
    pars tensa
    malleus (lateral process & manubrium)
    cone of light
    annulus
    umbo
    long process of incus

          

  12. osseous portion of eustachian tube is always open on ____ wall of middle earanterior

          

  13. tinniest bones in the bodyossicles
    -malleus
    -incus
    -stapes

          

  14. smallest muscle in the bodyossicles
    -malleus
    -incus
    -stapes

          

  15. middel ear muscles-impedence matching function
    -protection of inner ear structures

          

  16. Middle ear cavity akastapedius
    tensor tympani

          

  17. eustachian tubeprovide connection bw tympanic membrane and oval window

          

  18. epitympanic recess is filled byattic
    -extends beyond superior border of TM

          

  19. what's the recovery from the increase of pressure of the stapes pushing into the oval window?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

          

  20. promontory is opposite totactile stimulation

          

  21. primary source of sound amplificationfootplate

          

  22. tensor tympani draws manubrium ____ which _____ ____ to TMmedially; applies tension

          

  23. stapes seals ___ in inner earCN7 facial nerve

          

  24. area of foot plate85% of surface area has all 3 layrs

          

  25. middle bone bw malleus and stapesstapedius
    tensor tympani

          

  26. tensor tympani attaches toupper end of malleus handle

          

  27. manubrium of malleus connected toTM acts like aprimitive club/mallet

          

  28. Oval windowboundary bw middle and inner ear; holds footplate of stapes

          

  29. tympanic cavity isattic
    -extends beyond superior border of TM

          

  30. _____ pivots around its short processincus

          

  31. chorda tympani passes through middle ear space from _____ part of ______ wall to _____ wall, and crosses _____ TMmedially; applies tension

          

  32. chorda tympani is branch ofupper end of malleus handle

          

  33. stapedius is attached tohead of staps

          

  34. promontorylocated bw windows
    -bony ridge

          

  35. incus' short process fits into depression on posterior wall of ____ ____ ___stapes

          

  36. stiffening ossicular chain and tympanic membranefluid

          

  37. incusconnects middle ear to nasopharyngeal cavity

          

  38. describe the areal ratio of tympanic membrane to stapes footplatemucosal lining of middle ear space

          

  39. footplate and oval window are attached byoval window

          

  40. tensory tympani is innervated byCN7 facial nerve

          

  41. upon contraction of stapedius-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

          

  42. two thirds of tympanic membrane that is effective in vibrationmucosal lining of middle ear space

          

  43. posterior to tympanic cavity isirregularly shaped, tall and narro

          

  44. cartilaginous portion opens byyawning, swallowing, chewing

          

  45. eustachian tube is about ____ long1.5 in

          

  46. base of stapes is called3.2 smm

          

  47. reasons decrease force of low frequenciesit pullls footplate of stapes out of oval window, and draws stapes toward posterior wall of the middle ear

          

  48. medial layer of tympanic membrane is continous withmucosal lining of middle ear space

          

  49. cartilaginous portion opens duringyawning, swallowing, chewing

          

  50. ossicular chainprovide connection bw tympanic membrane and oval window

          

  51. ossicles are suspended from middle ear walls byligaments

          

  52. stapedius contracts _____ to loud soundsreflexively

          

  53. end of the manubrium is embedded in tympanic membrane at the _____umbo

          

  54. lateral layer of tympanic membrane, closest to the side of head hasepithelial cells

          

  55. impedence matching functionamplification of sound to comepnsate for loss of sound energy when going from air to fluid medium

          

  56. what is the recovery of sound of the aerial ratio of tympanic membrane to stapes footplate?25 dB of sound

          

  57. core layer islocated bw windows
    -bony ridge

          

  58. footplate sits in _____ _____ossicles
    -malleus
    -incus
    -stapes

          

  59. epitympatic recessirregularly shaped, tall and narro

          

  60. incus' end of long process is attached to ___ headhead of staps

          

  61. pars flaccidasandwiched bw lateral and medial layer

          

  62. function of chorda tympaniconnects middle ear to nasopharyngeal cavity

          

  63. the area of the footplate is ____ times smaller than pars tensa17

          

  64. tympanic membrane has _____ shapecircular

          

  65. TM orientation in infants isperpendicular to EAC

          

  66. round windowboundary bw middle and inner ear; holds footplate of stapes

          

  67. tympanic memrane has _____ ____ colorcircular

          

  68. pars tensalocated bw windows
    -bony ridge

          

  69. TM orientation in adults isparallel to EAC

          

  70. tensor tympani's orginsabove eustachian tube opening

          

  71. tympanic membrane slightly coned ______inward

          

  72. lateral layer of tympanic membrane closest to side of the head is continuous with skin ofexternal auditory canal

          

  73. tympanic cavity has air filled cavity bwouter ear and inner ear

          

  74. stapedius is innervated byCN7 facial nerve

          

  75. boundary bw outer and middle earossicles
    -malleus
    -incus
    -stapes

          

  76. tensor tympani contracts toCN V trigeminal

          

  77. middle ear functiontympanic cavity

          

  78. the ____ portio towards nasopharynx is normallyupper end of malleus handle