Fig. 2From: A Density Model for a Population of Theta NeuronsScheme of a population under an external influence with conduction delay. The population receives a known external influence σ 0 (t) from an excitatory population of neurons, and produces an activity r(t)—the firing rate of the population. The feedback is then given by J ∫ 0 t α(u)r(t−u)duBack to article page