Supplementary Figure 11: Song-evoked activity patterns of secondary-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 = 197 neurons; zfBF, n = 250 neurons) and neurograms (z-scored individual PSTHs; zfZF, n = 40 randomly selected neurons from two birds; zfBF, n = 40 neurons each). 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, *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 = 208 neurons in pPSTHs; n = 40 neurons each in neurograms) and lfBF birds (light blue; n = 190 neurons in pPSTHs; n = 40 neurons each). *P < 0.05. For both a and b, pPSTHs and neurograms were shifted in time by the average response latency of paired groups (zfZF and zfBF, 19 ms; lfLF and lfBF, 25 ms) to align with the stimuli.
