Middle Ear

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Across
  1. 1. the head of the malleus articulates with the incus in what direction?
  2. 2. attaches the stapes footplate to the oval window
  3. 7. condition when bacteria breeds
  4. 8. enter
  5. 9. the purpose of this is to equalize pressure in the middle ear, drain, and aerate
  6. 10. amplifies pressure 17 times from the TM to the footplate, this ratio leads to a gain of 25 dB
  7. 12. part of the incus that connects with malleus
  8. 14. exit
  9. 16. the Eustachian tube is 2/3…
  10. 17. Loss of ME would result in what a conductive HL of…
  11. 26. the weakest point of the ossicular chain and allows stapes footplate to rock
  12. 29. incudal ligament of the short limb of the incus
  13. 30. the middle and outer ear is fulled with ___
  14. 32. for ___ conduction, molecules vibrate the TM then move the stapes then set cochlear fluids into motion
  15. 34. for patients with otosclerosis the stapes is not moving which results in a BC loss at 2kHz known as…
  16. 37. internal and external carotid and sometimes subclavian arteries are the ME ______
  17. 38. the muscles that open up the Eustachian tube
  18. 39. the head, neck, two crura, and the footplate are 5…
  19. 40. the ligament of the neck of the malleus
  20. 42. middle ear muscle that serves to tense the TM and provides acoustic protection (CN V), OG: cartilaginous portion of ET, Inserts: neck of malleus
  21. 43. additional mass or stiffness leads to ______ impedance
Down
  1. 1. the incus and malleus firmly attach to each other and move as..
  2. 3. there attic of the middle ear space
  3. 4. leads to muscosa drainining fluid in the middle ear space
  4. 5. ligament of the incus (body)
  5. 6. for _____ conduction, cochlear fluids are set into motion via compression and rarefaction of bony labyrinth
  6. 11. the ligament of the anterior process of the malleus
  7. 13. the middle link of the ossicular chain
  8. 15. what substance hinders TM and ossicular chain movement
  9. 18. the opening of the Eustachian tube is surrounded by this
  10. 19. the largest of the three bones
  11. 20. what attaches the malleus to the TM
  12. 21. the middle ear overcomes impedance mismatch via three ___
  13. 22. part of the incus that connects with the stapes
  14. 23. smallest muscle in the body and serves to dampen the movement of the stapes (CN VII), OG: pyramidal eminence, Inserts: neck of stapes
  15. 24. the tensor tympani muscle inserts into the upper…
  16. 25. if the ET does not open, it builds negative pressure in the ME space, and leads you to feel…
  17. 27. the malleus, incus, and stapes are three bones in the ____ chain
  18. 28. the ligament of the head of the malleus
  19. 31. ratio aka buckling effect, two pieces of tissue vibrating around the fulcrum, total of a 4-6 dB gain
  20. 33. the smallest bone in the body
  21. 35. the Eustachian tube is 1/3..
  22. 36. ratio that forms a lever by the manubrium of the malleus and long process of the incus, moving the two ossicles in a unit, provides a 1.3/1 ratio gain
  23. 41. the function of the ME is to correct the impedance _____ between the outer and inner ear