Fig. 1. Schematic of the isolated stomatogastric nervous system, including the axon projections of MCN1 and CPN2 to the STG. The two lines with arrowheads projecting posteriorly from the STG neuropil represent the projection pattern of most STG motor neurons. Ganglia: CoG, commissural ganglion; OG, oesophageal ganglion; STG, stomatogastric ganglion; TG, thoracic ganglion. Nerves: coc_TG, circumoesophageal connective from the CoG to the TG; coc_B, circumoesophageal connective from the CoG to the brain; dgn, dorsal gastric nerve; dpon, dorsal posterior oesophageal nerve; ion, inferior oesophageal nerve; lgn, lateral gastric nerve; lvn, lateral ventricular nerve; mvn, medial ventricular nerve; pdn, pyloric dilator nerve; poc, post-oesophageal commissure; son, superior oesophageal nerve. Neurons: CPN2, commissural projection neuron 2; MCN1, modulatory commissural neuron 1.