Figure 1
From: Predicting n:1 locking in pulse coupled two-neuron networks using phase resetting theory

A) A schematic of an n:1 locking is shown. B-C) Comparison of predicted and observed modes of harmonic locking. Here, ε represents the difference in applied current which produces a difference in the intrinsic frequency of the two neurons and Gsyn is the synaptic conductance strength.