Chimera states and frequency clustering in systems of coupled inner-ear hair cells.

@article{Faber2021ChimeraSA,
  title={Chimera states and frequency clustering in systems of coupled inner-ear hair cells.},
  author={Justin Faber and Dolores Bozovic},
  journal={Chaos},
  year={2021},
  volume={31 7},
  pages={
          073142
        }
}
Coupled hair cells of the auditory and vestibular systems perform the crucial task of converting the energy of sound waves and ground-borne vibrations into ionic currents. We mechanically couple groups of living, active hair cells with artificial membranes, thus mimicking in vitro the coupled dynamical system. We identify chimera states and frequency clustering in the dynamics of these coupled nonlinear, autonomous oscillators. We find that these dynamical states can be reproduced by our… 

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References

SHOWING 1-10 OF 47 REFERENCES

Chaotic Dynamics Enhance the Sensitivity of Inner Ear Hair Cells

It is found that the hair bundle is most sensitive to a stimulus of small amplitude when it is poised in the weakly chaotic regime, and the response time to a force step decreases with increasing levels of chaos.

Spontaneous voltage oscillations and response dynamics of a Hodgkin-Huxley type model of sensory hair cells

It is shown that self-sustained regular voltage oscillations lead to enhanced and sharply tuned sensitivity of the hair cell to weak mechanical periodic stimuli and regimes of chaotic oscillations do provide a high sensitivity to low-frequency variations of external stimuli.

Chaotic Dynamics of Inner Ear Hair Cells

It is proposed that chaos may play a role in the hair cell’s ability to detect low-amplitude sounds and an enhancement of sensitivity to weak stimuli when the system is poised in the chaotic regime.

Auditory sensitivity provided by self-tuned critical oscillations of hair cells.

It is shown that a collection of motor proteins within a hair bundle can generate oscillations at a frequency that depends on the elastic properties of the bundle, which explains how hair cells can detect sounds that carry less energy than the background noise.

Explosive synchronization enhances selectivity: Example of the cochlea

Acoustical signal transduction in the cochlea is an active process that involves nonlinear amplification and spontaneous otoacoustic emissions. Signal transduction involves individual subunits

Comparison of a hair bundle's spontaneous oscillations with its response to mechanical stimulation reveals the underlying active process

It is confirmed that a hair bundle's spontaneous movements are produced by energy-consuming elements within the hair cell, and a breakdown in a general principle of equilibrium thermodynamics, the fluctuation–dissipation theorem is demonstrated.

Integrating the active process of hair cells with cochlear function

The auditory system is enhanced by an active process in cochlear hair cells that amplifies acoustic signals several hundred-fold, sharpens frequency selectivity and broadens the ear's dynamic range.

Spontaneous Oscillation by Hair Bundles of the Bullfrog's Sacculus

Observations accord with a model in which oscillations arise from the interplay of the hair bundle's negative stiffness with the activity of adaptation motors and with Ca 2+-dependent relaxation of gating springs.

Active hair-bundle movements can amplify a hair cell's response to oscillatory mechanical stimuli.

  • P. MartinA. Hudspeth
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1999
To enhance their mechanical sensitivity and frequency selectivity, hair cells amplify the mechanical stimuli to which they respond. Although cell-body contractions of outer hair cells are thought to