Figure 3
From: Distinct timescales for the neuronal encoding of vocal signals in a high-order auditory area
Auditory responses in anesthetized birds. From rendition to rendition, spike timing greatly changed when sequence variants (ABAB-Var series) were played back. No such changes were observed when the same sequence was repeated (ABAB-Same series). (a,b) Neuronal responses of representative putative narrow spike (a) and broad-spike (b) cells to playback of ABAB-Same (left panels) and ABAB-Var (right panels) series (spectrogram on top, ai: the sequence repeated 60 times for the ABAB-Same example series and one sequence variant for the ABAB-Var example series) are shown as raster plots (aii and bii, 60 iterations, dark colors for the 10 first and 10 last trials) and peristimulus time histograms (aiii and biii; 10 ms bin width; for the 10 first (top) and the 10 last (bottom) trials) that are time-aligned with sequence spectrograms. (c) ABAB-Same series evoked higher responses (RS values) than ABAB-Same series at the population level (left) and for the sub-population of narrow spike cells (right), but not for broad spike cells (middle). Thick line indicates mean values and shaded area represents SEM. (d) Despite of the difference in the response strength, adaptation rate computed over the first ten stimuli presentations, thus indicated that response strength similarly changed with repeated exposure to sequences. Thick line indicates mean values; shaded area represents SEM. Significant difference: *p < 0.05, **p < 0.01, ***p < 0.001.
