Kavanagh K T, Gould H, McCormick G, Franks R
Department of Otolaryngology and Maxillofacial Surgery, University of Tennessee, Memphis.
Ear Hear. 1989 Apr;10(2):124-30. doi: 10.1097/00003446-198904000-00008.
The auditory brain stem response and the middle latency response were recorded from low intensity click stimuli in 48 patients with mental handicaps. In the 23 patients (45 ears) with normal hearing thresholds, the ABR was found to have a lower test-retest variability than the MLR. This lower variability will correspond to higher identifiability at threshold. In the 25 patients with a hearing loss, four had MLRs recorded in ears with absent ABRs. In five of these ears no auditory response would have been detected if ABRs alone were recorded. Based on the above findings, the following recommendations can be made. Recording the ABR with open filters is the desired method for threshold detection in most subjects. If no response is obtained it is desirable to record a MLR. The recording of a MLR is probably more important in laboratories recording responses with steep filter slopes, since a greater portion of the slow wave activity, P phi (V) complex, will be phase shifted into the later portion of the time base.
对48名智力障碍患者施加低强度短声刺激，记录其听性脑干反应（ABR）和中潜伏期反应（MLR）。在听力阈值正常的23名患者（45耳）中，发现ABR的重测变异性低于MLR。这种较低的变异性意味着在阈值时具有更高的可识别性。在25名听力损失患者中，有4名患者在ABR缺失的耳中记录到了MLR。在其中5只耳中，如果仅记录ABR，则不会检测到听觉反应。基于上述发现，可提出以下建议。对于大多数受试者，使用开放滤波器记录ABR是阈值检测的理想方法。如果未获得反应，则应记录MLR。在使用陡峭滤波器斜率记录反应的实验室中，记录MLR可能更为重要，因为慢波活动P phi（V）复合波的更大一部分将相移到时基的后期部分。
