Figure 10. Auditory brainstem-evoked responses. A: Auditory brainstem-evoked responses for patient IV:1 (right ear upper section and left ear lower section). B: Auditory brainstem-evoked responses for patient IV:2 (right ear upper section and left ear lower section). In patient IV:1 the responses were of poor morphology ipsilaterally. Recording contralaterally, stimulating the left ear the response morphology was markedly abnormal and stimulating the right ear the response was absent. In patient IV:2 all responses were absent. Abbreviations: ipsi represents ipsilateral recording; contra represents contralateral.