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. 2010 Oct 20;30(42):14068–14079. doi: 10.1523/JNEUROSCI.3213-10.2010

Figure 1.

Figure 1.

The BIC of ABR is reduced in congenitally deaf cats. A, B, Example BIC waveforms from one acutely deafened cat (A) and one congenitally deaf cat (B). Each trace corresponds to a different stimulus level. BIC amplitude was measured between the notch and the following peak (arrows). C, BIC amplitudes as a function of stimulus level in congenitally deaf and acutely deafened cats. Gray shading shows the range of BIC amplitudes measured in acutely deafened cats by Smith and Delgutte (2007b). D, Monaural wave 4 amplitudes are also smaller in congenitally deaf cats. Amplitudes shown are average of responses to stimulation of each ear alone. E, BIC latencies are similar between congenitally deaf and acutely deafened cats, with the exception of one cat. F, Monaural wave 4 latencies tend to be shorter in congenitally deaf cats. Values shown are averages for stimulation of each ear alone. In B–F, stimulus levels are expressed relative to the monaural ABR thresholds, defined as the stimulus amplitude required to evoke 1 μV wave 4. Monaural wave 4 amplitudes were always equalized during binaural stimulation by application of an appropriate ILD.