FIG. 3.

Averaged tectorial membrane movement, after normalizing to resonant frequency (RF) and peak response ratio. a At the cochlear apex, the sharpness of tuning curve magnitudes were similar in the wild-type (+/+) and heterozygous (+/−) mice, but were broader in null (−/−) mice. b At the base, the tuning curves for all three genotypes were of similar sharpness. c At the apex, the phase responses were similar for wild-type and heterozygous mice, but there was a significantly reduced phase lag accumulation in null mice. d At the base, the phase lag accumulation of null mice was also less than that of wild-type and heterozygous mice, but the difference was not as large as that found at the apex. Statistical significance at each frequency is represented by an asterisk.