The McKean model of a neuron possesses a one dimensional fast voltage-like variable and a slow
recovery variable. A recent geometric analysis of the singularly perturbed system has allowed an
explicit construction of its phase response curve [S Coombes 2001 Phase-locking in networks of
synaptically coupled McKean relaxation oscillators, Physica D, Vol 160, 173-188]. Here we use
tools from coupled oscillator theory to study weakly coupled networks of McKean neurons. Using
numerical techniques we show that the McKean system has traveling wave phase-locked solutions
consistent with that of a network of more biophysically detailed Hodgkin-Huxley neurons
