develops from receives synaptic input in region sends synaptic output to region receives synaptic input from neuron sends synaptic output to cell GABA-Chol neuron lamina monopolar neuron L1 lamina monopolar neuron L5 T4 neuron medulla layer M1 medulla layer M4 medulla layer M5 medulla layer M9 medulla layer M10 medulla intrinsic neuron Mi1 transmedullary neuron Tm3 fly_anatomy.ontology Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB. The neurotransmitter was assessed to be GABA by the intersection of the expression of the VGAT-GAL4 driver (FBtp0069181) and an antibody against GABA (Raghu et al., 2013). Connectivity in the medulla was assessed by electron microscopy reconstruction from 7 columns (Takemura et al., 2013). Neuron was assessed to be cholinergic based on anti-HA antibody detection of HA-tagged VAChT expression (Pankova & Borst, 2017). Tm3 https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bae0/7069908/ef7abe34662d/359_2019_1375_Fig2_HTML.jpg transmedullary neuron Tm3a Transmedullary narrow field neuron that terminates in lobula layers 1 and 4 with bleb-like terminal arborizations. It has fine arborizations in medulla layers M1, M4, and M5, and has bleb-type arborization in medulla layers M1, M4, M9 and M10 (Morante and Desplan, 2008; Fischbach and Dittrich, 1989). Pre-synaptic terminals are present mainly in medulla layers M9-M10, but also in all other layers where neurites extend laterally (Pankova and Borst, 2017). It receives input from lamina monopolar neuron L1 and L5 and medullary intrinsic neuron Mi1 and it outputs to T4 neurons (Takemura et al., 2013). It seems to be capable of both cholinergic (Pankova & Borst, 2017) and GABAergic (Raghu et al., 2013) neurotransmission. VFB:FBbt_00003791 Tm3a FlyBrain_NDB:10153 FBbt:00003791 Tm3 lobula layer 1 lobula layer 4 narrow field transmedullary neuron Notch ON hemilineage secondary neuron immature transmedullary neuron Tm3 adult cholinergic neuron adult GABAergic neuron