Signal flow inside the tunnel of Corti

Egbert De Boer, Fangyi Chen, Dingjun Zha, Karl Grosh, Amir Nankali, Alfred L. Nuttall

Research output: Chapter in Book/Report/Conference proceedingConference contribution


All With the advent of Optical Coherence Tomography (OCT), a variation of the standard laser-interferometer technique, vibrations of various points inside the cochlea can be measured separately and concurrently. In this work we measured vibrations of the basilar membrane (BM) and the Reticular Lamina (RL) in the cochlea of the guinea pig. Stimulus tones had frequencies in the range from 10 to 25 kHz, they were generated and measured with a spacing of 250 Hz. By smoothing and interpolation the spacing was reduced to 50 Hz. We confirmed earlier findings in that in viable animals the responses at the RL are generally larger than those of the BM, and have smaller phase delays. Moreover, these differences are little dependent of the level of stimulation. Our main hypothesis is: stimulation of the stapes primarily excites the structures in the upper (RL) part of the Organ of Corti (OoC) channel. Subsequently, movements of the RL cause movements of the fluid in the OoC channel, which in turn moves the BM. Computation of the sound field generated by the RL yielded results that agree very well with the data. These results thus confirm the hypothesis.

Original languageEnglish (US)
Title of host publicationTo the Ear and Back Again - Advances in Auditory Biophysics
Subtitle of host publicationProceedings of the 13th Mechanics of Hearing Workshop
EditorsChristopher Bergevin, Sunil Puria
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416703
StatePublished - May 31 2018
Event13th Mechanics of Hearing Workshop: To the Ear and Back Again - Advances in Auditory Biophysics, MoH 2017 - St. Catharines, Canada
Duration: Jun 19 2017Jun 24 2017

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other13th Mechanics of Hearing Workshop: To the Ear and Back Again - Advances in Auditory Biophysics, MoH 2017
CitySt. Catharines

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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