Grand-averaged auditory evoked potentials to sound onsets.

<p>Auditory brainstem responses (ABRs; top), middle-latency auditory evoked potentials (MLAEPs; middle), and long-latency auditory evoked potentials (LLAEPs; bottom) recorded by routine clinical protocols in the patient with cortical deafness (left) and in the control group (right). Note the integrity of brainstem auditory responses and the absence of bilateral middle- and long-latency evoked potentials, characterizing cortical deafness.