Auditory neuropathy spectrum disorder (ANSD) or auditory dys-synchrony is a condition where otoacoustic emissions (OAE) and/or cochlear microphonics
are present, and auditory brainstem responses (ABR) and acoustic reflexes are absent or abnormal (1-4).
was observed which reversed with change in polarity of stimuli suggestive of auditory neuropathy (Fig 6, 7).
[7,8] They found that perfusion of air into the scala tympani resulted in a drastic decrease in the cochlear microphonics
and in the amplitude of the compound action potential.