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Articles, Systems/Circuits

Spatial Irregularities of Sensitivity along the Organ of Corti of the Cochlea

Andrei N. Temchin and Mario A. Ruggero
Journal of Neuroscience 20 August 2014, 34 (34) 11349-11354; DOI: https://doi.org/10.1523/JNEUROSCI.2558-13.2014
Andrei N. Temchin
Knowles Hearing Center, Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois 60208-3550
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Mario A. Ruggero
Knowles Hearing Center, Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois 60208-3550
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Abstract

Fine structures of spatial profiles were computed from existing records of cat and chinchilla auditory-nerve fibers on the basis of their characteristic frequencies and cochlear maps. The spatial fine structures of characteristic-frequency thresholds and of “spontaneous” and driven firing rates were mutually correlated, implying the presence of sensitivity fluctuations due to spatial irregularities of presynaptic structures or processes of the inner hair cells and their input. These findings suggest that activity that appears spontaneous is not actually spontaneous and may indicate irregularities of tonotopic mapping in cochlear mechanics.

  • auditory-nerve fibers
  • cochlea
  • inner hair cells
  • organ of Corti
  • spatial irregularities
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The Journal of Neuroscience: 34 (34)
Journal of Neuroscience
Vol. 34, Issue 34
20 Aug 2014
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Spatial Irregularities of Sensitivity along the Organ of Corti of the Cochlea
Andrei N. Temchin, Mario A. Ruggero
Journal of Neuroscience 20 August 2014, 34 (34) 11349-11354; DOI: 10.1523/JNEUROSCI.2558-13.2014

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Spatial Irregularities of Sensitivity along the Organ of Corti of the Cochlea
Andrei N. Temchin, Mario A. Ruggero
Journal of Neuroscience 20 August 2014, 34 (34) 11349-11354; DOI: 10.1523/JNEUROSCI.2558-13.2014
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Keywords

  • auditory-nerve fibers
  • cochlea
  • inner hair cells
  • organ of Corti
  • spatial irregularities

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