sends synaptic output to region optic lobe pioneer neuron optic lobe pioneer neuron 3 OLP3 VFB:FBbt_00003706 1/2/3 designation appears to be arbitrary and is not used by authors - https://orcid.org/0000-0002-1373-1705. FBbt:00003706 projection-OLP projection optic lobe pioneer cell One of the three optic lobe pioneer neurons, which persist through development (Tix et al., 1989). This is a projection neuron that receives input in the larval optic neuropil and has outputs in the lower lateral horn (Larderet et al., 2017). pOLP fly_anatomy.ontology embryonic/larval ventrolateral protocerebrum larval visual projection interneuron larval lateral horn neuron larval cholinergic neuron embryonic/larval lateral horn