Figure 3. Population average responses of increasing stimulus size.

(A) Relative change of LFP power spectra with increasing stimulus size. For the sake of illustration, the data were smoothed by a 5 Hz Sgolay filter. The color shade stripes indicate the standard error. (B) Normalized spike power spectra of different stimulus sizes. The legends are identical to those of (A). (C–E) Size-tuning curves of mean power of LFP (blue) and spikes (green) at different bands, along with that of mean firing rate (red). The data points are the population-averaged responses and their standard error. Solid lines indicate the fitted DoG function. The Adjust-R²s of LFP power were 0.523, 0.973, and 0.978 in beta, gamma, and fast band, whereas those of spike power were 0.801, 0.747, and 0.353 in the three bands, respectively. The Adjust-R² of firing rate was 0.992.