Screening and follow up assessment in three cases of auditory neuropathy

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Figure 1 .

(A) Screening ABR from case 2 left ear, showing no response. (B) An ABR shown for comparison, showing the three typical positive peaks often identified in the neonate with normal hearing.

Figure 2 .

ABR waveforms recorded in case 2, showing typical early receptor responses but no wave V components. An alternately phased high intensity 4kHz tone pip stimulus was used to evoke these waveforms, resulting in enhancement of the summating potential and cancellation of the cochlear microphonics.