Normal Values of Ipsilateral and Contralateral Auditory Brainstem Responses Induced by Click in Normal Hearing Youth of Different Gender / 听力学及言语疾病杂志

ABSTRACT

Objective To study the characteristics of ipsilateral and contralateral ABRs in young adults with normal hearing,and the differences between the genders and recording sides(ipsilateral vs.contralateral).Methods Eighty-eight subjects(176 ears)aged 18 to 21 years old were recruited to perform ipsilateral and contralateral ABRs evoked by 70 dB nHL click.The mean and standard deviation of the latency of waves Ⅰ,Ⅲ,Ⅴ and the in-terpeak interval of Ⅰ-Ⅲ,Ⅲ-Ⅴ and Ⅰ-Ⅴ of ipsilateral,and waves Ⅲ,Ⅴ and the interpeak interval ABRs of Ⅲ-Ⅴof contralateral ABRs were calculated.The ANOVA was used to study the differences between the males and fe-males,and between ipsilateral and contralateral recordings.Results Males showed delayed peak and interpeak la-tency in waves Ⅲ,Ⅴ,Ⅰ-Ⅲ,Ⅲ-Ⅴ,Ⅰ-Ⅴ(F=13.13～60.82,P＜0.001).The peak and interpeak latency of waves Ⅲ,Ⅴ,Ⅲ-Ⅴ(F=22.43～76.18,P＜0.001)showed difference between ipsilateral and contralateral ABRs.The latency of ipsilateral ABRs in waves Ⅲ were delayed,but in other components were earlier.Conclusion This study established the normal values of ipsilateral and contralateral ABRs in young adults with normal hearing,and reported the gender and recording sides(ipsilateral vs.contralateral)differences in ABRs.