FB2026_03 , released September 17, 2026
CV Term Report
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Term transmedullary Y neuron TmY9 ID (Ontology) FBbt:00003827 (Fly Anatomy)
Definition Transmedullary Y wide-field neuron that terminates with both fine and bleb-type arborizations in lobula layer 5, and in lobula plate layers 1 and 2. It displays both fine and bleb-type arborizations in medulla layers M3 and M8, but has only fine arborizations in medulla layer M4 (Morante and Desplan, 2008; Fischbach and Dittrich, 1989). It seems to be capable of both cholinergic and GABAergic neurotransmission (Varija Raghu et al., 2011; Raghu et al., 2013).[ FlyBase:FBrf0049410 FlyBase:FBrf0204652 FlyBase:FBrf0212356 FlyBase:FBrf0220286 ]
Also Known As"TmY9"
CommentThe acetylcholine neurotransmitter was assessed by co-labelling cells with a Cha-GAL4.7.4 driver (FBtp0014830) and an anti-ChAT antibody (Varija Raghu et al., 2011). The GABA neurotransmitter was assessed by the intersection of the expression of the VGAT-GAL4 driver (FBtp0069181) and an antibody against GABA (Raghu et al., 2013). Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB. Nern et al. (2025) - FBrf0262545 split this into TmY9a and TmY9b, but do not have distinct drivers for the subtypes.
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VFB:FBbt_00003827
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 transmedullary Y neuron TmY9 (all annotations which use CV term, excluding "NOT" statements)
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transmedullary neuron
 |__transmedullary Y neuron________________
adult optic lobe columnar neuron           |
 |__optic lobe wide-field columnar neuron__|
cholinergic neuron                         |
 |__adult cholinergic neuron_______________|
GABAergic neuron                           |
 |__adult GABAergic neuron_________________|
adult neuron                               |
 |__adult cholinergic neuron_______________|
 |__adult GABAergic neuron_________________|
                                           transmedullary Y neuron TmY9  4 rec.
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Is a transmedullary Y neuron
adult cholinergic neuron
adult GABAergic neuron
optic lobe wide-field columnar neuron
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Synonyms
  • "TmY9" EXACT VFB_SYMBOL
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FlyBrain_NDB:10177
VFB:FBbt_00003827