supraesophageal ganglion neuron serotonergic neuron serotonergic SP neuron 2010-12-03T03:02:12Z Serotonergic neuron of the larval or adult brain located in one of two groups in the supraesophageal ganglion, in either the anterodorsal cortex (SP1) or slightly more posteriorly but also in the dorsal cortex region (SP2) (Valles and White, 1988). VFB:FBbt_00100359 FBbt:00100359 serotonergic supraesophageal ganglion neuron fly_anatomy.ontology