A nonlinear cochlear model with the outer hair cell piezoelectric activity

2003 ◽  
Vol 114 (4) ◽  
pp. 2330-2330
Author(s):  
Xiaoai Jiang ◽  
Karl Grosh
Keyword(s):  
Hair Cell ◽  
Outer Hair Cell ◽  
Cochlear Model ◽  
Piezoelectric Activity

A cochlear model using feed-forward outer-hair-cell forces

1995 ◽  
Vol 86 (1-2) ◽  
pp. 132-146 ◽  
Author(s):  
C.Daniel Geisler ◽  
Chunning Sang
Keyword(s):  
Hair Cell ◽  
Outer Hair Cell ◽  
Feed Forward ◽  
Cochlear Model

Modeling the Mechanics of Tethers Pulled From the Cochlear Outer Hair Cell Membrane

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Kristopher R. Schumacher ◽  
Aleksander S. Popel ◽  
Bahman Anvari ◽  
William E. Brownell ◽  
Alexander A. Spector
Keyword(s):  
Cell Membrane ◽  
Hair Cell ◽  
Outer Hair Cell ◽  
Lateral Wall ◽  
Outer Hair Cells ◽  
The Body ◽  
Computational Method ◽  
Membrane Properties ◽  
Bending Modulus ◽  
Sound Amplification

Cell membrane tethers are formed naturally (e.g., in leukocyte rolling) and experimentally to probe membrane properties. In cochlear outer hair cells, the plasma membrane is part of the trilayer lateral wall, where the membrane is attached to the cytoskeleton by a system of radial pillars. The mechanics of these cells is important to the sound amplification and frequency selectivity of the ear. We present a modeling study to simulate the membrane deflection, bending, and interaction with the cytoskeleton in the outer hair cell tether pulling experiment. In our analysis, three regions of the membrane are considered: the body of a cylindrical tether, the area where the membrane is attached and interacts with the cytoskeleton, and the transition region between the two. By using a computational method, we found the shape of the membrane in all three regions over a range of tether lengths and forces observed in experiments. We also analyze the effects of biophysical properties of the membrane, including the bending modulus and the forces of the membrane adhesion to the cytoskeleton. The model’s results provide a better understanding of the mechanics of tethers pulled from cell membranes.

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