A Granger Causality Measure for Point Process Models of Ensemble Neural Spiking Activity
Figure 2
Spike train examples generated based on the nine-neuron network of Figure 1.
It can be seen that neurons generally fire less (or more) spikes after other neurons with inhibitory (or excitatory) influence on them fire spikes. However, it is hard to estimate the underlying causal network between neurons directly from this plot.