has soma location mandibular segment serotonergic SE1 neuron fly_anatomy.ontology subesophageal ganglion neuron 1 subesophageal ganglion SE neuron 1 FBbt:00001980 SE1 neuron VFB:FBbt_00001980 Serotonergic neuron whose cell body is located in one of 3 clusters on either side of the ventral midline of the mandibular segment. Axons from this cluster cross the midline in the mandibular segment. In the adult they are located adjacent to the esophagus foramen. There are 2 cells in this cluster. serotonergic SE neuron