听神经病患者80Hz听觉稳态诱发电位研究

The study of 80 Hz auditory steady-state evoked potentials in patients with auditory neuropathy

目的:探讨听神经病患者80Hz听觉稳态诱发电位的特点及与听性脑干诱发电位V波的相关性。方法:以1000Hz短音95dBnHL作声刺激,比较听神经病组和正常对照组80Hz听觉稳态诱发电位及短音听性脑干反应(ABR)的波形差异。结果:听神经病组两种听觉诱发电位波形的同时引出率为85.4%且波幅低或极低,ABR的Ⅰ、Ⅲ波消失;14.6%两种听觉诱发电位波形同时消失。而正常对照组两种波形的同时引出率为100.0%。结论:80Hz听觉稳态诱发电位与听性脑干反应的Ⅴ波有明显相关性。

Objective：To investigate the character of 80 Hz auditory steady-state evoked potentials in auditory neuropathy （AN） patients and the correlation between it and ABR. Method.. The 80 Hz auditory steady-state evoked potentials and ABR to 95 dBnHL （1 000 Hz） tone-pip stimuli were recorded from the scalp in patients with AN and normal subjects. The difference of the waveforms between AN ears and normal ears was compared. Resuit：In 85.4% AN ears the 80 Hz auditory steady-state evoked potentials and ABR were simultaneously present. Their amplitudes were low or extremely low. The Ⅰ and Ⅲ waves of ABR were absent. The 80 Hz auditory steady-state evoked potentials and ABR were simultaneously absent,in 14.6% AN ears, but were present in all normal ears. Conclusion：The 80 Hz auditory steady-state evoked potentials and the V wave of ABR may come from the same brainstem sources.