FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term T3 neuron ID (Ontology) FBbt:00003730 (Fly Anatomy)
Definition T neuron with its soma posteriorly adjacent to the gap between the medulla and lobula plate and a cell body fiber that projects along the proximal surface of the medulla before branching in the second optic chiasm (Fischbach and Dittrich, 1989; Shinomiya et al., 2019). One branch forms a bushy, fine, terminal arborization in medulla layer M9 and the other forms a terminal arborization in lobula layers 2 and 3 with mix of bleb-type and fine terminal branches (Morante and Desplan, 2008; Fischbach and Dittrich, 1989). It seems to be capable of both glutamatergic and GABAergic neurotransmission.[ FlyBase:FBrf0049410 FlyBase:FBrf0204652 FlyBase:FBrf0213690 FlyBase:FBrf0220286 FlyBase:FBrf0243899 ]
Also Known As "T neuron T3" ; "T3"
Comment The glutamate neurotransmitter was assessed by labelling cells with a vGlut[CNSIII]-GAL4 driver (FBti0129148) (Raghu and Borst, 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.
Links to External Ontologies
VFB:FBbt_00003730
Annotations
Records annotated with this term OR any of its CHILD TERMS
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Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
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Relevant FlyBase reports
 Alleles   Insertions Constructs
 T3 neuron (all annotations which use CV term, excluding "NOT" statements)       1      1      9      1      7
Spanning Tree (Parents/Children)
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adult optic lobe columnar neuron
 |__optic lobe wide-field columnar neuron__
GABAergic neuron                           |
 |__adult GABAergic neuron_________________|
optic lobe intrinsic columnar neuron       |
 |__T neuron_______________________________|
adult neuron                               |
 |__adult GABAergic neuron_________________|
 |__adult glutamatergic neuron_____________|
glutamatergic neuron                       |
 |__adult glutamatergic neuron_____________|
                                           T3 neuron  19 rec.
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Is a T neuron
adult GABAergic neuron
adult glutamatergic neuron
optic lobe wide-field columnar neuron
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FlyBrain_NDB:10183
VFB:FBbt_00003730