FIG. 2.

Representative examples of tectorial membrane movement from six different cochleae. a–c Magnitude plots of the response ratio for all three genotypes. At the apex, the bandwidth of the tuning curve in the null (−/−) mouse is broader than that found in wild-type (+/+) or heterozygous (+/−) mice, but they are all similar at the base. d–f Simultaneously acquired phase data demonstrate large, progressive phase lag accumulations in wild-type and heterozygous mice with increasing stimulus frequency. A reduced phase lag accumulation was found in the null mouse.