Mean and SEM of cross-correlations from 20 1s simulation runs. In addition to the twin sites of asynchronous noise input to the same driving sites as in figure 1, spatio-temporally white noise has been input to all other sites in the field. Results are shown for two widely different conditions of non-specific cortical activation, as indicated by the value of parameter Q ns . Figure 3a Effects of stimulus extension and coherence on synchronous oscillation. A single bar has coherent white noise inputs applied at each portion of the bar.
Separate bars have no input signal correlations - see text for details.
Diffuse field noise amplitude 0.000033. Thus, visible differences in cross-correlation are highly statistically significant. Figure 3b Results shown are derived as for figure 3a except that uncorrelated white noise was delivered to all parts of each bar, as well as being uncorrelated between bars. Diffuse field noise amplitude 0.000025. Figure 3c Cross-correlations for the asynchronous bar case, with diffuse field noise 0.000025, for bars moving in the same and opposite directions.