A finite element model to predict the consequences of endolymphatic hydrops in the basilar membrane

2021 ◽  
Author(s):  
B. Areias ◽  
M. P. L. Parente ◽  
F. Gentil ◽  
C. Caroça ◽  
J. Paço ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Basilar Membrane ◽  
Endolymphatic Hydrops ◽  
Element Model

Finite Element Model of Human Cochlea Considering of the Helicotrema Size

2013 ◽  
Vol 456 ◽  
pp. 576-581 ◽  
Author(s):  
Li Fu Xu ◽  
Na Ta ◽  
Zhu Shi Rao ◽  
Jia Bin Tian
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Basilar Membrane ◽  
Round Window ◽  
Element Model ◽  
Oval Window ◽  
Fe Model ◽  
Cochlear Duct ◽  
Human Cochlea ◽  
Set Up

A 2-D finite element model of human cochlea is established in this paper. This model includes the structure of oval window, round window, basilar membrane and cochlear duct which is filled with fluid. The basilar membrane responses are calculated with sound input on the oval window membrane. In order to study the effects of helicotrema on basilar membrane response, three different helicotrema dimensions are set up in the FE model. A two-way fluid-structure interaction numerical method is used to compute the responses in the cochlea. The influence of the helicotrema is acquired and the frequency selectivity of the basilar membrane motion along the cochlear duct is predicted. These results agree with the experiments and indicate much better results are obtained with appropriate helicotrema size.

scholarly journals The Influence of Piezoelectric Transducer Stimulating Sites on the Performance of Implantable Middle Ear Hearing Devices: A Numerical Analysis

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 782 ◽  
Author(s):  
Liu ◽  
Zhao ◽  
Yang ◽  
Rao
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Middle Ear ◽  
Hearing Aids ◽  
Piezoelectric Transducer ◽  
Basilar Membrane ◽  
Round Window ◽  
Element Model ◽  
Round Window Membrane ◽  
Hearing Devices

To overcome the inherent deficiencies of hearing aids, implantable middle ear hearing devices (IMEHDs) have emerged as a new treatment for hearing loss. However, clinical results show that the IMEHD performance varies with its transducer’s stimulating site. To numerically analyze the influence of the piezoelectric transducer’s stimulating sites on its hearing compensation performance, we constructed a human ear finite element model and confirmed its validity. Based on this finite element model, the displacement stimulation, which simulates the piezoelectric transducer’s stimulation, was applied to the umbo, the incus long process, the incus body, the stapes, and the round window membrane, respectively. Then, the stimulating site’s effect of the piezoelectric transducer was analyzed by comparing the corresponding displacements of the basilar membrane. Besides, the stimulating site’s sensitivity to the direction of excitation was also studied. The result of the finite element analysis shows that stimulating the incus body is least efficient for the piezoelectric transducer. Meanwhile, stimulating the round window membrane or the stapes generates a higher basilar membrane displacement than stimulating the eardrum or the incus long process. However, the performance of these two ideal sites’ stimulation is sensitive to the changes in the excitation’s direction. Thus, the round window membrane and the stapes is the ideal stimulating sites for the piezoelectric transducer regarding the driving efficiency. The direction of the excitation should be guaranteed for these ideal sites.

scholarly journals Basilar membrane and reticular lamina motion in a multi-scale finite element model of the mouse cochlea

2015 ◽  
Author(s):  
Joris Soons ◽  
Joris Dirckx ◽  
Charles Steele ◽  
Sunil Puria
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Basilar Membrane ◽  
Element Model ◽  
Multi Scale

scholarly journals Finite-element model of the active organ of Corti

2016 ◽  
Vol 13 (115) ◽  
pp. 20150913 ◽  
Author(s):  
Guangjian Ni ◽  
Stephen J. Elliott ◽  
Johannes Baumgart
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Basilar Membrane ◽  
Imaging Techniques ◽  
Fluid Pressure ◽  
Organ Of Corti ◽  
Element Model ◽  
Outer Hair Cells ◽  
Tectorial Membrane ◽  
Linear Superposition

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 (OHCs) 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 OHCs. The transverse basilar membrane (BM) 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 BM to acoustic excitation is predicted using a linear superposition of the calculated responses and an assumed frequency response for the OHC feedback.

A Finite Element Model for the Design of Local Skin Flaps

1986 ◽  
Vol 19 (4) ◽  
pp. 807-824
Author(s):  
Wayne F. Larrabee ◽  
J.A. Galt
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Skin Flaps ◽  
Local Skin

New Finite Volume–Multiscale Finite-Element Model for Solving Solute Transport Problems in Porous Media

2021 ◽  
Vol 26 (3) ◽  
pp. 04021002
Author(s):  
Yifan Xie ◽  
Zhenze Xie ◽  
Jichun Wu ◽  
Yong Chang ◽  
Chunhong Xie ◽  
...  
Keyword(s):  
Finite Element ◽  
Porous Media ◽  
Finite Element Model ◽  
Solute Transport ◽  
Finite Volume ◽  
Element Model ◽  
Multiscale Finite Element ◽  
Transport Problems
Sign in / Sign up

Export Citation Format

Share Document