Figure 1.

Coincidence detection and synchrony index. (A) Two spike trains (target neuron $t_i^2$ and reference neuron $S_i^1$. Gray rectangles around spikes of the target neuron represent windows for detecting coincidences (S_i = 1) and those around spikes of the reference neuron represent jitter windows. The intersection between these two sets of windows (shown as horizontal gray lines) is associated with the p_i values. Values of S_i and p_i are given below each spike of the reference neuron assuming π_J/τ_s = 2. (B) Synchrony index of two spikes as a function of the time interval between them (τ_s = 40 ms). Solid black line: π_J/τ_s = 2; solid gray line: π_J/τ_s = 1.5; dashed gray line: π_J/τ_s = 2.5.