Figure 5.

Startle response. Wild-type and homozygous Kv3.1^−/− mice were subjected to constant frequency sound (500-ms duration) at four different intensity levels in one session. The intensities are indicated in relative values from 60 to 100, with 100 being the highest possible output of the amplifier-speaker system. The response index is the ratio of the number of startle responses to the total number of trials at that particular intensity level. At five test frequencies a two-factor ANOVA test revealed significant differences (P < 0.05) between wild-type and homozygous mutant animals (the P value is shown in each panel). The asterisks indicate significant differences in multiple comparison tests (Tukey test; ∗, P < 0.05; ∗∗, P < 0.01).