A population model of decision making.

Neurons in the first cluster project to the neurons in the second cluster with synaptic weight w₁(t), while neurons in the second cluster project to neurons in the first cluster with synaptic weight w₂(t). Neurons receive external inputs I₁(t) and I₂(t), respectively. As this is a rate model, I₁(t), I₂(t) have a unit of [1/s]. In addition, both neuronal populations receive self inhibition with delays (dashed arrows with flat heads), τ₁ and τ₂ respectively. The dynamics of this system is described by Eq 2.