fasciculates with develops from expresses sends synaptic output throughout has sensory dendrite in Or19a Or19b antennal lobe glomerulus DC1 adult antennal lobe commissure antennal olfactory receptor neuron precursor Nba antennal olfactory receptor neuron of intermediate sensillum adult antennal lobe receptor neuron bilateral antennal lobe receptor neuron antennal intermediate sensillum ai3 adult olfactory receptor neuron Or19 FlyBrain_NDB:10394 odorant receptor neuron Or19 VFB:FBbt_00067018 fly_anatomy.ontology ORN_DC1 Adult olfactory receptor neuron (ORN) that expresses Or19a and Or19b (Benton et al., 2025). Its dendrite transduces signals from antennal intermediate sensillum ai3 and it responds to terpenes (Benton et al., 2025). It innervates the antennal lobe glomerulus DC1 bilaterally, fasciculating with the antennal lobe commissure (Kaur et al., 2019). It develops from an Nba precursor (Benton et al., 2025). There are around 20 of these cells on each side (Grabe et al., 2016; Benton et al., 2025). FBbt:00067018 ORN at3A ORN_DC1 ORN at3B ORN ai3A ORN ai2A ORN (Or19a/b) adult ORN Or19 odorant receptor neuron DC1 DoOR:Or19b DoOR:Or19a