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Finite element model of the active organ of Corti

Finite element model of the active organ of Corti
Finite element model of the active organ of Corti
The cochlear amplifier that provides our hearing with its extraordinary sensitivity and selectivity is thought to be the result of an active biomechanical process within the sensory auditory organ, the organ of Corti. Although imaging techniques are developing rapidly, it is not currently possible, in a fully active cochlea, to obtain detailed measurements of the motion of individual elements within a cross section of the organ of Corti. This motion is predicted using a two-dimensional finite element model. The various solid components are modelled using elastic elements, the outer hair cells as piezoelectric elements, and the perilymph and endolymph as viscous and nearly incompressible fluid elements. The model is validated by comparison with existing measurements of the motions within the passive organ of Corti, calculated when it is driven either acoustically, by the fluid pressure, or electrically, by excitation of the outer hair cells. The transverse basilar membrane motion and the shearing motion between the tectorial membrane and the reticular lamina are calculated for these two excitation modes. The fully active response of the basilar membrane to acoustic excitation is predicted using a linear superposition of the calculated responses and an assumed frequency response for the outer hair cell feedback.

sensory auditory organ, cochlear micromechanics, modelling, fluid-structure interaction, electromechanical feedback system, monolithic
1-12
Ni, Guangjian
f6ddc112-7d81-403a-b97a-7ecbc8fd4e59
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Baumgart, Johannes
2b226a54-8ae3-454d-8d7e-9bb6c0403cf3
Ni, Guangjian
f6ddc112-7d81-403a-b97a-7ecbc8fd4e59
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Baumgart, Johannes
2b226a54-8ae3-454d-8d7e-9bb6c0403cf3

Ni, Guangjian, Elliott, Stephen and Baumgart, Johannes (2016) Finite element model of the active organ of Corti. Journal of the Royal Society Interface, 13 (115), 1-12, [20150913]. (doi:10.1098/rsif.2015.0913).

Record type: Article

Abstract

The cochlear amplifier that provides our hearing with its extraordinary sensitivity and selectivity is thought to be the result of an active biomechanical process within the sensory auditory organ, the organ of Corti. Although imaging techniques are developing rapidly, it is not currently possible, in a fully active cochlea, to obtain detailed measurements of the motion of individual elements within a cross section of the organ of Corti. This motion is predicted using a two-dimensional finite element model. The various solid components are modelled using elastic elements, the outer hair cells as piezoelectric elements, and the perilymph and endolymph as viscous and nearly incompressible fluid elements. The model is validated by comparison with existing measurements of the motions within the passive organ of Corti, calculated when it is driven either acoustically, by the fluid pressure, or electrically, by excitation of the outer hair cells. The transverse basilar membrane motion and the shearing motion between the tectorial membrane and the reticular lamina are calculated for these two excitation modes. The fully active response of the basilar membrane to acoustic excitation is predicted using a linear superposition of the calculated responses and an assumed frequency response for the outer hair cell feedback.

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S2 Passive Acoustic.avi - Other
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S3 Electrical.avi - Other
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More information

Accepted/In Press date: 28 January 2016
e-pub ahead of print date: 1 February 2016
Published date: 2016
Keywords: sensory auditory organ, cochlear micromechanics, modelling, fluid-structure interaction, electromechanical feedback system, monolithic
Organisations: Signal Processing & Control Grp

Identifiers

Local EPrints ID: 386923
URI: http://eprints.soton.ac.uk/id/eprint/386923
PURE UUID: 6ff006d8-c5d4-4fce-8678-0fe7c1100555
ORCID for Guangjian Ni: ORCID iD orcid.org/0000-0002-9240-3020

Catalogue record

Date deposited: 05 Feb 2016 13:56
Last modified: 17 Dec 2019 01:37

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