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. 2015 Nov 13;10(11):e0142956. doi: 10.1371/journal.pone.0142956

Fig 1. Schematic of the isolated STNS including the projection neuron MCN1, the sensory neurons GPR1/2, and the POC neurons.

Fig 1

There is a single MCN1 (blue) cell body in each CoG that projects to the STG. The POC neurons (red) originate outside of the STNS and enter the CoG to terminate as a neuroendocrine organ, the ACO. The somata of the two bilateral pairs of GPR neurons (green) occur in peripheral nerves. These bipolar neurons terminate in muscles and project anteriorly to the STG and continue into the CoGs. Abbreviations: Ganglia- CoG, commissural ganglion; OG, oesophageal ganglion; SOG, supraoesophageal ganglion; STG, stomatogastric ganglion; TG, thoracic ganglion. Neurons- GPR, gastropyloric receptor neuron; MCN1, modulatory commissural neuron 1; POC, post-oesophageal commissure neurons. Nerves: coc, circumoesophageal connective; dgn, dorsal gastric nerve; gpn, gastropyloric nerve; ion, inferior oesophageal nerve; lgn, lateral gastric nerve; lvn, lateral ventricular nerve; mgn, medial gastric nerve; mvn, medial ventricular nerve; poc, post-oesophageal commissure; son, superior oesophageal nerve; stn, stomatogastric nerve. Other: ACO, anterior commissural organ.