Figure 6.

Frequency tuning curves (FTCs) obtained from the LL (A) and IC (B). For visual purposes only a subset of the data (12 of 85 LL and 9 of 33 IC) are shown as curves (5 point running average). The horizontal segments near 80 dB reflect the ceiling SPL of the threshold tracking algorithm. CF and threshold of all neurons recorded are indicated with filled circles. Differences in shading help to visually distinguish different neurons. C, Distributions of CF of the LL (red) and the IC (blue) with a bin width of 100 Hz. Note that the IC data are biased toward CFs smaller than 500 Hz. D, Probability distributions of response thresholds for the LL (red) and the IC (blue) with a bin width of 5 dB SPL.