develops from receives synaptic input in region sends synaptic output to region receives synaptic input from neuron sends synaptic output to cell lamina monopolar neuron L2 lamina monopolar neuron L4 T5 neuron medulla layer M2 medulla layer M3 medulla layer M4 medulla layer M5 medulla layer M9 transmedullary neuron Tm2 FlyBrain_NDB:10144 FBbt:00003790 Tm2 fly_anatomy.ontology Tm2 Transmedullary narrow field neuron that has its main dendritic arborization in medulla layer M2 (Ting et al., 2014), where it receives input from lamina monopolar neuron L2 (Takemura et al., 2011), and additional postsynaptic terminals in M4-M5, where it receives input from lamina monopolar neuron L4 (Takemura et al., 2011). It has presynaptic terminals in layers M3, M4 and M9 (Fischbach and Dittrich, 1989; Takemura et al., 2011). Its axon follows the posterior edge of its cognate medulla column (Ting et al., 2014), then crosses the second optic chiasma to terminate in lobula layers 1 and 2 (Fischbach and Dittrich, 1989). In layer 1 it outputs to T5 neurons (Shinomiya et al., 2014). It is a cholinergic neuron (Varija Raghu et al., 2011; Gao et al., 2008; Takemura et al., 2011). There is usually one of these cells per optic column (Nern et al., 2025). The neurotransmitter has been assessed by co-labelling cells with a P{Cha-GAL4.7.4} driver (FBtp0014830) and an anti-ChAT antibody (Varija Raghu et al., 2011), by using a Cha-GAL4.DBD (FBtp002350) (Gao et al., 2008) and by neurotransmitter was assessed by single cell RT-PCR measurement of choline acetyltransferase (FBgn0000303) expression (Takemura et al., 2011). Connectivity in the medulla was extrapolated from serial EM of 3 columns from a single sample (Takemura et al., 2008) or from 7 columns (Takemura et al., 2013). Connectivity in the lobula was assessed by serial section electron microscopy of a single column (Shinomiya et al., 2014). https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bae0/7069908/ef7abe34662d/359_2019_1375_Fig2_HTML.jpg VFB:FBbt_00003790 lobula layer 1 lobula layer 2 narrow field transmedullary neuron Notch ON hemilineage secondary neuron immature transmedullary neuron Tm2 adult cholinergic neuron