(a) Illustration of pellet moving through a section of the GI tract. Illustration is not drawn to scale. (b) Network of model enteric neurons, smooth muscle, and ICC. SN: sensory neuron, AI: ascending interneuron, DI: descending interneuron, IN: inhibitory motor neuron, EN: excitatory motor neuron, CM: circular muscle fiber. (c) Pellet position over time, along with raster plots of sensory neuron action potentials and circular muscle fiber contractions, as functions of position.