Fig. 15.

Sustained activity in the coupled network: (a) Gaussian filtered (σ = 5 ms) firing rate of the SFCN (red) and the BFCN (blue) as functions of time. Activity of 10% of the neurons is recorded. The blue arrow indicates a spontaneous emergence of synfire activity in the BFCN, resulting in a substantial transient increase in firing rate. The red arrow highlights a switching failure in which neither successor chain is activated, causing activity in the SFCN to die out temporarily. (b) Power spectrum of the average Gaussian filtered firing rate between 0 and 10.24 s (vertical black dashed line in (a)). Black arrow indicates peak at around 7 Hz