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. 2008 Jan 4;94(7):2639–2653. doi: 10.1529/biophysj.107.123257

FIGURE 3.

FIGURE 3

Hair-bundle displacements and MT currents in OHCs and IHCs. (A) OHC motion of the fixed end of the fiber cemented to the piezoelectric actuator (Δx1, upper), the end attached to an OHC bundle (Δx2, middle), and MT current (lower). The oscillations in the displacement and current records are attributable to slight underdamping of the stimulator. (B) MT current-displacement relationship (upper), with peak current plotted against instantaneous displacement measured at the peak of the current, and force-displacement relationships (lower) from records in A. The force is plotted against displacements measured 0.5 ms (instantaneous) and 3 ms (steady state) after stimulus onset. KHB = 5 mN·m−1, P7 rat. (C) IHC motion of the fixed end of a fiber (Δx1, upper), the end attached to the inner hair cell bundle (Δx2, middle) and MT current (lower). (D) MT current-displacement relationship (upper), with the peak current plotted against instantaneous displacement at the peak current, and force-displacement relationships (lower) from records in C. The force is plotted against displacements measured 0.6 ms (instantaneous) and 3 ms (steady state) after stimulus onset. KHB = 1.5 mN·m−1, P11 rat. Stiffness of flexible fiber: 1.6 mN·m−1 (A); 2.3 mN·m−1 (C).