Figure 9.
A, C, Population response consistencies (RX) for neurons responding to at least one variant of the 30 kHz (A) or 40 kHz (C) harmonic vocalization, sorted from most consistent (top) to least consistent (bottom). B, D, Population selectivity indices (D), sorted from least selective to the natural vocalization (top) to most selective (bottom). Box plots indicate the range of the second and third quartile of the distribution along with the median. The black line connects the metric values for a single neuron across the vocalization variants, indicating how variable a single neuron may be to perturbations in the vocalization characteristics. There is evidence of significant heterogeneity in the responses to the vocalizations from both a spike timing (A, C) and a spike rate (B, D) perspective. Except for the no-AM variant, mean response consistencies did not differ significantly from the responses to the natural vocalizations (similar temporal jitter), nor was there a significant difference in mean spike rate between the responses to the natural vocalizations and most modified vocalizations. * indicates distributions that were significantly different from the distribution of the natural variant (two-sample Kolmogorov–Smirnov test, α = 0.05).