Figure 4.

Dendritic electrical synapses improve synchrony only when combined with strong inhibition. Raster plot representing the activity of 200 neurons in the network in which the neurons interact via inhibition and electrical synapses located on their dendrites. (A) g_inh = 0, σ = 0. The initial conditions are such that the neurons spike asynchronously. At a given time, a transient pulse of current resets the state of all the neurons and synchronizes their activity. Left panel: when g_gap = 0 synchrony persists once the resetting pulse is over. Right panel: when g_gap = 0.02 mS/cm², synchrony dies out in less than 100 ms (B) g_inh = 0.002 mS/cm², σ = 0.15 μA × ms^1/2/cm². Left panel: g_gap = 0; the network activity is synchronized. Right panel: g_gap = 0.02 mS/cm²; synchrony is suppressed. (C) g_inh = 0.01 mS/cm², σ = 0.4 μA × ms^1/2/cm². Left panel: g_gap = 0; the activity is asynchronous. Right panel: g_gap = 0.02 mS/cm²; the activity is now synchronized.