Cell tuning to interval and sequential order during the SCT. A, Responses of a double-tuned cell with a short preferred interval and a sharp preferred sequence order around the first continuation interval. The raster histogram is aligned (red line) to the first tap of the continuation phase. B, Responses of a sharply double-tuned cell with a long preferred interval and a preferred sequence order around the second continuation interval. The raster is aligned (red line) to the second tap of the continuation phase. C, D, Double-Gaussian tuning functions for the cell responses depicted in A and B, respectively. The dots correspond to the mean discharge rate for each duration–sequence order combination. The color code represents the discharge rate (hertz) of the cells. E, F, Distribution of the dual preferred interval/sequence order for the cell population with significant Gaussian fits in the visual and auditory marker conditions, respectively. S, Distribution of preferred ordinal sequence; I, distribution of preferred interval. The color code represents the number (n) of double-tuned cells in different duration and sequence order combinations.