FB2026_03 , released September 17, 2026
CV Term Report
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Term transmedullary neuron Tm29 ID (Ontology) FBbt:00049916 (Fly Anatomy)
Definition Transmedullary neuron that receives most of its input in around 5 columns of medulla layer M6, where it also has a small number of presynapses (Nern et al., 2025). It also has a small amount of arborization in the rest of M3-M8 (Nern et al., 2025). It crosses the second optic chiasm and has mixed pre- and post-synapses in around 3 columns of lobula layer 5B (Nern et al., 2025). It is glutamatergic (Davis et al., 2020). There are around 170-270 of these cells per hemisphere (Nern et al., 2025).[ FlyBase:FBrf0244935 FlyBase:FBrf0260545 FlyBase:FBrf0262545 ]
Also Known As"Tm29" ; "Tm5d"
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VFB:FBbt_00049916
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 transmedullary neuron Tm29 (all annotations which use CV term, excluding "NOT" statements)
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transmedullary neuron
 |__adult transmedullary CB3851 neuron______
adult neuron                                |
 |__adult glutamatergic neuron______________|
secondary neuron                            |
 |__Notch OFF hemilineage secondary neuron__|
Notch OFF hemilineage neuron                |
 |__Notch OFF hemilineage secondary neuron__|
glutamatergic neuron                        |
 |__adult glutamatergic neuron______________|
                                            transmedullary neuron Tm29  11 rec.
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Is a Notch OFF hemilineage secondary neuron
adult glutamatergic neuron
adult transmedullary CB3851 neuron
Develops from immature transmedullary neuron Tm29
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VFB:FBbt_00049916