The Masked ABR (mABR): a New Measurement Method for the Auditory Brainstem Response

摘要

A gecko click-evoked ABR. Example of click-evoked ABR traces at five stimulus levels. Each curve is the average of 400 recordings. The two gray lines show averages of even and odd measurements as an indicator of variability. The first peak is assumed to be the summation potential (marked SP). The peaks used for measuring latency is marked P1 and N1. An increase in latency of the peaks is seen with decreasing stimulus intensity. Insert shows the peak-peak amplitude of the ABR as a function of the click stimulus level for the current example; notice that there is no clear increase in amplitude at the higher click levels. Insert shows the acoustic click stimulus as recorded at the ear of the animal. Insert shows the frequency content of the acoustic click stimulus