Evidence of a Hopf bifurcation in frog hair cells.

  title={Evidence of a Hopf bifurcation in frog hair cells.},
  author={Mark C Ospeck and V{\'i}ctor M. Egu{\'i}luz and Marcelo Magnasco},
  journal={Biophysical journal},
  volume={80 6},
The membrane potential of hair cells in the low-frequency hearing organ of the bullfrog, the amphibian papilla, sinusoidally oscillates at small amplitude in the absence of acoustical input. We stimulate the cell with a series of periodic currents close to this natural frequency and observe that its current-to-voltage transfer function is compressively nonlinear, having a large gain for small stimuli and a smaller gain for larger currents. Along with the spontaneous oscillation, this implies… CONTINUE READING