FIG. 6.

Auditory physiology in the γ-synuclein null mutant mouse. Auditory brainstem response (ABR, A) threshold testing as well as distortion product otoacoustic emissions (DPOAE, B) testing was used to test hearing in the γ-synuclein knockout mouse compared to the wild-type littermate. ABR testing of both broadband clicks and tone-burst stimuli (A) demonstrates no significant differences in hearing between the wild-type (WT n = 6) and knockout (KO) mice (n = 10). Similarly, DPOAE testing (B) demonstrated no significant difference between the wild-type (WT) and knockout (KO) mice. The reference noise floor (nf KO, nf WT) of each DPOAE tracing is included.