Local stiffness of the OCC.
(A) Stiffness of the OCC opposing outer hair cell elongation. When a coupled force fC is applied at the ends of the outer hair cell, the stiffness felt by the outer hair cell can be calculated from the resultant displacement δC. Faint gray lines indicate the non-deformed configuration. (B) Stiffness of the OCC opposing hair bundle deflection. (C) Standard (thick curve) and test case (curve with ● symbols) values of kOHC. The OCC stiffness felt by an outer hair cell (curve with + symbols) is also shown. In the test case, the axial stiffness of the outer hair cells was adjusted to obtain the opposite longitudinal trend of rOHC. (D) Standard (thick curve) and test case (curve with ● symbols) values of kOHB. (E) Standard and test case values of rOHC = (fC/δC—kOHC) /kOHC. (F) Standard and test case values of rOHB = (fB/δB—kOHB)/kOHB.