用园窗法记录的豚鼠听觉早潜伏期40Hz相关电位

采用适宜的参数，从豚鼠园窗记录出一种新的听觉４０Ｈｚ相关电位，它不同于Ｇａｌａｍｂｏｓ提出的听觉中潜伏期４０Ｈｚ相关电位。通过不同部位引导的对比观察，对该电位的基本特征、影响因素及其可能发生机理进行了初步探讨，结果显示４０ＨｚＡＥＲＰ－ＥＬＲ波形稳定，振幅高，频率响应好，反应阈值低。在０．５ｋＨｚ短纯音的反应阈值为１３．７５ｄＢｎＨＬ，较颅顶的听觉中潜伏期４０Ｈｚ相关电位低３５ｄＢｎＨＬ。

RESEARCH ON 40Hz AUDITORY EVENT RELATED POTENTIAL OF EARLY LATENCY RESPONSE AERP-ELR RECORDED WITH ROUND WINDOWS METHOD IN GUINEA PIGS

Using suitable parameters in this paper, we recorded 40Hz auditory event relaied potential from round window in guinea pigs. It was different from Galambos's 40Hz AERP-MLR. Wepreliminarilly researched the basic features, influence factors and mechanism of 40Hz AERP-ELR.The results indicate that the response of 40Hz AERP-ELR was shady wave forms,higher amplitude, better charectristics of frequency and lower responsive threshold. For example,the responsive threshohd of 40Hz AERP-ELR elicited by 0.5 kHz tone burst was 13.75dBnHL. It was 35dB nHL lower than 40Hz AERP-MLR.