FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term lobula tangential neuron LT1 ID (Ontology) FBbt:00003860 (Fly Anatomy)
Definition Lobula tangential neuron that sends a thick projection into the proximal lobula that bifurcates, with the combined dendritic arbors of both branches spanning the entire tangential extent of lobula layer 2 (Fischbach and Dittrich, 1989; Tanaka and Clark, 2022). Its axon innervates the ventrolateral protocerebrum (Otsuna and Ito, 2006). There are approximately four of these cells per hemisphere (Tanaka and Clark, 2022).[ FlyBase:FBrf0049410 FlyBase:FBrf0193607 FlyBase:FBrf0253297 ]
Also Known As "lobular tangential neuron 1" ; "lobular tangential neuron LT1" ; "LT1"
Comment Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989). Nern et al. (2025) - FBrf0262545 split this into LT1a, LT1b, LT1c and LT1d, but these subtypes were not identified at light level.
Links to External Ontologies
VFB:FBbt_00003860
Annotations
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Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       2
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 Insertions
 lobula tangential neuron LT1 (all annotations which use CV term, excluding "NOT" statements)       2
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optic lobe tangential neuron____
adult visual projection neuron__|
                                lobula tangential neuron
                                 |__lobula tangential neuron LT1  2 rec.
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Synonyms
  • "lobular tangential neuron 1" EXACT[ FlyBase:FBrf0049410 ]
    "lobular tangential neuron LT1" EXACT
    "LT1" EXACT VFB_SYMBOL
Secondary IDs
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FlyBrain_NDB:10014
VFB:FBbt_00003860