Extended Data Fig. 11: Neurons in zebra finch RA do not appear to encode pitch within the song.

a-c, Burst-associated pitch values for an example RA neuron. Black boxes in a denote vocalization periods associated with bursting events (indicated by red bars in c), with vocal periods shifted by 12 ms relative to burst events. Pitch contour within each period is highlighted in b, with the mean pitch value marked by a green dot and a number next to the contour. d, Pitch values for all bursting events across the RA population. Each dot represents a burst event and its associated pitch. e, Relationship between firing rates and pitch for three example RA neurons, presented as binned scatter plots (gray) and averaged firing rates (mean ± SEM) across pitches (blue). f, Distributions of the range of burst-associated pitch values for observed data (blue) and for randomly sampled pitch values from d. g, Distributions of the variance of burst-associated pitch values for observed data (blue) and for randomly sampled pitch values from d. In f and g, Exact p-values shown on top are derived from two-sided Wilcoxon rank-sum tests (n = 116 samples).