Before revision:  We next characterize the points at which the measure concentrates, and exhibit a particular solution corresponding to a Dirac measure at a time satisfy an ordinary differential equation identical to the original FitzHugh-Nagumo system.
After revision:  We next characterize the points at which the measure concentrates, and exhibit a particular solution corresponding to a Dirac measure concentrated on a time-dependent point satisfying an ordinary differential equation identical to the original FitzHugh-Nagumo system.