FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term transmedullary Y neuron TmY5a ID (Ontology) FBbt:00003823 (Fly Anatomy)
Definition Transmedullary Y narrow field neuron that terminates with both fine and bleb-type arborizations in lobula layers 4, 5 and 6, and in lobula plate layer 3, but only has fine arborizations in lobula plate layer 1. It displays both fine and bleb-type arborizations in medulla layers M6 and M8, and has fine arborizations in medulla layers M2, M3, M4, M5 and M9 (Morante and Desplan, 2008; Fischbach and Dittrich (1989). It is glutamatergic (Davis et al., 2020).[ FlyBase:FBrf0049410 FlyBase:FBrf0204652 FlyBase:FBrf0222324 FlyBase:FBrf0244935 ]
Also Known As"TmY5a"
CommentThe identification of axons was done using a UAS-tau (P\{UAS-tau-lacZ.O\} - FBtp0010033) reporter (Morante and Desplan, 2008). The morphology of terminals was judged from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB.
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VFB:FBbt_00003823
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Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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transmedullary neuron
 |__transmedullary Y neuron_________________
 |__narrow field transmedullary 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______________|
optic lobe narrow field columnar neuron     |
 |__narrow field transmedullary neuron______|
                                            transmedullary Y neuron TmY5a  13 rec.
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Is a transmedullary Y neuron
narrow field transmedullary neuron
Notch OFF hemilineage secondary neuron
adult glutamatergic neuron
Develops from immature transmedullary Y neuron TmY5a
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FlyBrain_NDB:10174
VFB:FBbt_00003823