FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term larval VUM neuron ID (Ontology) FBbt:00001592 (Fly Anatomy)
Definition The cell body of the VUM neuron is located medially in the ventral and posterior cortex region of the neuromere. Fibers from VUM neurons run tightly fasciculated dorsally towards the neuropil where they separate to form a motorneuronal projection bifurcating in the dorsal part of the anterior commissure, and an interneuronal projection bifurcating in the ventral part of the posterior commissure (Bossing and Technau, 1994). There are usually six VUM neurons per neuromere in the late embryo and larva.[ FlyBase:FBrf0041721 FlyBase:FBrf0053395 FlyBase:FBrf0072659 ]
Also Known As"ventral unpaired median neuron" ; "VUM-cluster neurons"
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VFB:FBbt_00001592
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 larval VUM neuron (all annotations which use CV term, excluding "NOT" statements)
     larval VUM neuron | larval stage
      --       --       --
     larval VUM neuron | progressive
      --       --
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larval midline neuron_____
mesectodermal derivative__|
                          larval ventral midline neuron
                           |__larval VUM neuron  123 rec.
                               |__abdominal 8 VUM neuron
                               |__larval subesophageal VUM neuron 7 rec.
                               |   |__larval labial VUM neuron(+)
                               |   |__larval mandibular VUM neuron(+) 4 rec.
                               |   |__larval maxillary VUM neuron(+) 7 rec.
                               |__larval VUM interneuron 41 rec.
                               |   |__larval mandibular VUM neuron 1 1 rec.
                               |   |__larval maxillary VUM neuron 1 3 rec.
                               |   |__VUM4 interneuron 16 rec.
                               |   |__VUM5 interneuron 12 rec.
                               |   |__VUM6 interneuron 14 rec.
                               |__larval VUM motor neuron 33 rec.
                               |   |__larval dorsal VUM motor neuron(+) 4 rec.
                               |   |__larval lateral VUM motor neuron(+) 3 rec.
                               |   |__larval mesothoracic VUM motor neuron
                               |   |__larval metathoracic VUM motor neuron
                               |   |__larval prothoracic VUM motor neuron
                               |   |__larval ventral VUM motor neuron(+) 4 rec.
                               |__V neuron 2 rec.
                                   |__abdominal V neuron(+)
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Is a larval ventral midline neuron
Develops from VUM precursor
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VFB:FBbt_00001592