Rise Time, ms
Figure 76.7 Graphs showing the relationship between median latency and sound stimulus rise time for young-adult (diamond) and old (square) single nerve cell groups containing: (A) all nerve cells analyzed; (B) nerve cells stimulated at 65 dB SPL; and (C) matched young-adult and old nerve cells stimulated at 65 dB SPL and equal sensation levels above each cell's threshold. In all cases, the nerve cells in the old animals show shorter latencies than the young adult cells. This is consistent with a loss of inhibition with age in the auditory midbrain and has implications for disruptions of complex sound coding with age. From Simon et al. (2004), with permission.
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