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The middle ear; Cochlea - 1

The middle ear; Cochlea - 1. Dr. Duck O. Kim. Salamanca, Spain May, 2010. Purves Fig 13.3. human ear. Yost Fig. 6-1. Yost Fig. 6-1. middle-ear muscles: tensor tympani - malleus stapedius - stapes. Pickles, 1988. the middle ear. Impedance transformation. Pickles, 1988. function of

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The middle ear; Cochlea - 1

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  1. The middle ear; Cochlea - 1 Dr. Duck O. Kim Salamanca, Spain May, 2010

  2. Purves Fig 13.3

  3. human ear Yost Fig. 6-1

  4. Yost Fig. 6-1

  5. middle-ear muscles: tensor tympani - malleus stapedius - stapes Pickles, 1988 the middle ear Impedance transformation Pickles, 1988

  6. function of the middle ear: impedance matching pressure equalization

  7. pressure gain by the middle ear Yost, Fig. 6-8

  8. Bekesy, 1960 external ear middle ear inner ear

  9. data from human cadavers bas. mem. disp. amplitude origin of tonotopic organization Bekesy, 1960 distance from stapes (mm)

  10. cochlear traveling wave

  11. temporal bone cochlea SV ST Pickles, 1988

  12. inner ear

  13. Purves

  14. organ of Corti SV RM SM TM Smith, 1975 BM ST

  15. afferent afferent inner hair cell outer hair cell * * Smith, 1975

  16. tip-link model of hair-cell excitation Pickles, 1984

  17. Purves Fig 13-6

  18. Questions in the 1970s: 1. What is the mechanism underlying sharp cochlear frequency tuning? “second filter”? 2. Is cochlear mechanics linear or nonlinear?

  19. first report of nonlinearity in cochlear mechanics Rhode, 1971

  20. vulnerability of cochlear mechanics Sellick et al., 1982

  21. OHC motilities underlie the cochlear amplifier. HB motility somatic motility Neely and Kim, 1983 Brownelle et al., 1985 Kim, 1986 Hudspeth, 1997

  22. frequency tuning curves of cochlear ganglion neurons OHC damage normal threshold (dB SPL) Robertson & Johnstone, 1979 frequency (kHz)

  23. active cochlear model of Neely & Kim, 1986 frequency tuning curves of single cochlear nerve fibers

  24. nonlinear responses of basilar membrane Robles & Ruggero, 2001

  25. nonlinear responses of basilar membrane Robles & Ruggero, 2001

  26. otoacoustic emissions (OAE) cavity human ear Kemp, 1978

  27. otoacoustic emissions (OAE) transient evoked OAE spontaneous OAE distortion product OAE

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