FIGURE 5.

Response failures introduced gaps in the neural representation of songs with accelerated trill rates (N = 14 cells, 6 birds). Responses of one and the same representative cell are shown in each panel. a) The natural song type typically evoked a response to each syllable, evident as generally contiguous rows in each raster plot. The reduced probability of response to individual syllables in accelerated trills was evident as gaps in each row (different syllable numbers were presented at each trill rate to preserve the total stimulus duration). b) Response failures occurred throughout the song duration (black line: mean; gray area: SE of response at each syllable in the song; horizontal dotted line indicates expectation if cell responded to every syllable). c) Response failures tended to occur across consecutive syllables, also evident as gaps in the responses in panel a, and the length of those failures became longer as trill rate became more accelerated.