fasciculates with develops from expresses sends synaptic output throughout has sensory dendrite in Ir84a adult antennal lobe commissure antennal lobe glomerulus VL2a antennal olfactory receptor neuron precursor Nab antennal olfactory receptor neuron of coeloconic sensillum adult antennal lobe receptor neuron bilateral antennal lobe receptor neuron adult olfactory receptor neuron Ir84a 2011-11-03T01:56:34Z DoOR:Ir84a This neuron was indirectly shown to be olfactory by electrophysiological recordings of a single coeloconic sensillum (Grosjean et al., 2011). ORN_VL2a ORN ac4Y fly_anatomy.ontology FlyBrain_NDB:10435 VFB:FBbt_00110007 ionotropic receptor neuron Ir84a ORN (VL2a) Adult olfactory receptor neuron that expresses the Ionotropic receptor (Ir) 84a and the co-receptor Ir8a (Benton et al., 2025). Its dendrite transduces signals from the antennal coeloconic sensillum ac4 (Benton et al., 2009). It responds to phenylacetic acid and phenylacetaldehyde (Benton et al., 2025). Its axon innervates antennal lobe glomerulus VL2a bilaterally, following the antennal lobe commissure (Grosjean et al., 2011; Silbering et al., 2011). It develops from an Nab precursor (Benton et al., 2025). There are around 30 of these cells on each side in females and 24 in males (Grabe et al., 2016). ORN Ir84a ORN ac4A Ir84a ac4 ionotropic receptor neuron VL2a FBbt:00110007 ORN_VL2a antennal coeloconic sensillum ac4