Figure 6. Variations of C_AP and C_SP with network connectivity and cell excitability (for τ_θ/τ_s = 1, g = 1).

C_AP increases with increased synaptic connectivity, as would be expected from the correlative measure (Eq 4), with equal contributions from both processes (C_AP = 0) when (w/g) (τ_θ/τ_s)  = 1. In contrast, C_SP is always close to -1, the subtractive feedback process sets the length of the silent phase regardless of the value of w. Finally, both C_AP and C_SP are unaffected by changes in θ₀, showing that cell excitability does not influence which process controls episodic activity.