FIG. 6.
A: density histograms of the best UFM (bars upward hatching) and DFM (bars with downward hatching) slopes of the 116 DSCF neurons. The leftmost vertical axis shows the percentage of the population represented by each bar for DFMs and the rightmost vertical axis shows this same information for UFMs. The central vertical axis, which shows the actual number of neurons per bar (labeled in B) applies to both UFMs and DFM plots. The horizontal axis is an integer scale of FM slopes (kHz/ms). The left side of the horizontal integer scale, which measures the slopes of DFMs, is the reverse of the right side, which measures the slopes of UFMs. A dashed line in the DFM plot shows where the echolocation FM2 would be located on the slope scale. B: density histogram of the best UFM (n = 162) and DFM (n = 97) bandwidths of DSCF neurons. The horizontal axis represents the range of the best DFM and UFM and bandwidths. C: density histogram of the best UFM (n = 124) and DFM (n = 109) center frequencies for DSCF neurons. The horizontal axis represents the number of halves of the “best bandwidth” by which the central frequency was shifted. Zero on the x-axis corresponds to each neuron's BFhigh.