Fig. 2
From: Coarse-Grained Clustering Dynamics of Heterogeneously Coupled Neurons
Left panels: Different snapshots of a double-cluster state of 40 neurons during a cycle, projected onto the n–V phase plane (
), where solid lines are the limit cycles of a representative neuron; 
’s are drawn from the uniform distribution. The arrow in a indicates the direction of the trajectories on the limit cycle. Right panels: The dots show the membrane potentials of all the neurons at the same time as in the left panel, plotted against their values. In d and f, the naked eye can easily differentiate the two clusters. While the dynamic variables evolve, the correlations between the 
and the remain smooth throughout a cycle