Resonant tectorial membrane motion in the inner ear: its crucial role in frequency tuning.

  title={Resonant tectorial membrane motion in the inner ear: its crucial role in frequency tuning.},
  author={A. Gummer and W. Hemmert and H. Zenner},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  volume={93 16},
  • A. Gummer, W. Hemmert, H. Zenner
  • Published 1996
  • Physics, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
The tectorial membrane has long been postulated as playing a role in the exquisite sensitivity of the cochlea. In particular, it has been proposed that the tectorial membrane provides a second resonant system, in addition to that of the basilar membrane, which contributes to the amplification of the motion of the cochlear partition. Until now, technical difficulties had prevented vibration measurements of the tectorial membrane and, therefore, precluded direct evidence of a mechanical resonance… Expand
Evidence of tectorial membrane radial motion in a propagating mode of a complex cochlear model.
This work extends the frequency range of their previous hybrid analytical-finite-element approach to model the basal as well as apical regions of the guinea pig cochlea and solves the fluid-solid interaction eigenvalue problem for the axial wavenumber, fluid pressure, and vibratory relative motions of the cochlear partition as a function of frequency. Expand
A role for tectorial membrane mechanics in activating the cochlear amplifier
Experimental and theoretical results are consistent with the hypothesis that a tectorial membrane resonance introduces the correct phasing between mechanical and electrical responses for power generation, effectively turning on the cochlear amplifier. Expand
A role for tectorial membrane mechanics in activating the cochlear amplifier
Evidence is presented which suggests that a relatively simple feature, the frequency dependence of the radial impedance of the tectorial membrane, provides requisite mechanics to turn on the frequency-specific nonlinear process essential for healthy hearing. Expand
Tectorial membrane stiffness gradients.
It is shown that a tectorial membrane stiffness gradient exists along the cochlea, similar to that of the basilar membrane, and Young's modulus, which was obtained from measurements performed in the transversal direction, decreased by -2.6 dB/mm from base to apex. Expand
The tectorial membrane: one slice of a complex cochlear sandwich
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Frequency structure in intracochlear voltage supports the concept of tectorial membrane mechanical resonance
The mechanical and electrical responses of the mammalian cochlea to acoustic stimulus are nonlinear and tuned. This is reflective of the electromechanical response of the outer hair cells (OHC) whichExpand
Although Tectb−/− mice have a low-frequency hearing loss, basilar-membrane and neural tuning are both significantly enhanced in the high-frequency regions of the cochlea, with little loss in sensitivity. Expand
A micromechanical model of the cochlea with radial movement of the tectorial membrane
A different type of micromechanical model which assumes that the tectorial membrane is driven by a lymphatic fluid flow that can be shown to have a substantial radial component and which can simulate the sharp tuning mechanisms of the cochlea well. Expand
Frequency-dependent properties of the tectorial membrane facilitate energy transmission and amplification in the cochlea.
From mechanical measurements of isolated segments of the tectorial membrane, the important new discovery is made that the stiffness of the TM is reduced when it is mechanically stimulated at physiologically relevant magnitudes and at frequencies below their frequency place in the cochlea. Expand
The interplay of organ-of-Corti vibrational modes, not tectorial- membrane resonance, sets outer-hair-cell stereocilia phase to produce cochlear amplification
  • J. Guinan
  • Medicine, Physics
  • Hearing Research
  • 2020
It appears that the change in phase of RL radial motion comes about because of a transition between different organ-of-Corti (OoC) vibrational modes that changes RL motion relative to BM and TM motion. Expand