Supplementary Figure 9: Song-evoked activity patterns of intermediate-region neurons.
From: Emergent tuning for learned vocalizations in auditory cortex
a, Spectrogams of ZF (top) and BF (bottom) song segments plotted above pPSTHs (mean ± 95% C.I.; zfZF, n = 149 neurons; zfBF, n = 73 neurons) and neurograms (z-scored single-neuron PSTHs; zfZF, n = 40 randomly selected neurons from two birds; zfBF, n = 31 and 33 neurons for birds 1 and 2, respectively). Colored lines above pPSTHs indicate sustained differences (≥10 ms) between groups, and bar graphs to the right show the number of segments in each ZF or BF stimulus that evoked a greater pPSTH in zfZF birds (orange) or zfBF birds (brown) (two-sided paired t-tests, n = 5 songs for each species, both P > 0.05). Traces to the right of neurograms show the selectivity of each respective neuron (dashed lines are t = ±1.96). b, As in a but for LF and BF songs and lfLF birds (gray; n = 164 neurons in pPSTHs; n = 40 neurons each in neurograms) and lfBF birds (light blue; n = 133 neurons in pPSTHs; n = 40 and 31 neurons in neurograms for birds 1 and 2, respectively). **P < 0.01. For both a and b, pPSTHs and neurograms were shifted in time by the average response latency of paired groups (zfZF and zfBF, 13 ms; lfLF and lfBF, 16 ms) to align with the stimuli.
