FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term embryonic GW neuron ID (Ontology) FBbt:00001586 (Fly Anatomy)
Definition Embryonic motor neuron precursor that develops from the first ganglion mother cell in the 7-3 lineage (GMC 7-3a) (Higashijima et al., 1996; Isshiki et al., 2001) and is the Notch ON descendent of this GMC (Lee and Lundell, 2007). One of these cells is produced in each thoracic, abdominal (A1-A8) and labial hemisegment (Higashijima et al., 1996; Rogulja-Ortmann et al., 2007; Rickert et al., 2018). It only develops into a larval neuron in segments S3-T2, in more posterior segments it undergoes programmed cell death (Rogulja-Ortmann et al., 2007; Rickert et al., 2018).[ FlyBase:FBrf0086454 FlyBase:FBrf0112030 FlyBase:FBrf0138252 FlyBase:FBrf0194301 FlyBase:FBrf0200999 FlyBase:FBrf0238045 ]
Also Known As "embryonic 7-3M"
Comment According to Schmid et al. (1999) this motorneuron projects out of the posterior root of the ISN, joining the ISNd branch and innervates muscles VO4-6. However, this neuron was not identified by Landgraf et al. (1997). Found (and survives) in labial, but not maxillary or mandibular segments (Rickert et al., 2018 - FBrf0238045).
Links to External Ontologies
VFB:FBbt_00001586
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      10
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       2
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 embryonic GW neuron (all annotations which use CV term, excluding "NOT" statements)      11      4      1      2
     embryonic GW neuron | ectopic       2       --       --       1
     embryonic GW neuron | embryonic stage       1       --       --       --
Spanning Tree (Parents/Children)
Only view relationship:
developing material anatomical entity
 |__developing embryonic structure_______
ectodermal derivative                    |
 |__NB7-3 lineage neuron_________________|
primary neuron                           |
 |__Notch ON hemilineage primary neuron__|
 |__NB7-3 lineage neuron_________________|
 |__immature primary neuron______________|
Notch ON hemilineage neuron              |
 |__Notch ON hemilineage primary neuron__|
immature neuron                          |
 |__immature primary neuron______________|
CNS neuron                               |
 |__NB7-3 lineage neuron_________________|
                                         embryonic GW neuron  18 rec.
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Is a developing embryonic structure
Notch ON hemilineage primary neuron
NB7-3 lineage neuron
immature primary neuron
Develops from ganglion mother cell GMC7-3a
Part of presumptive embryonic/larval nervous system
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Synonyms
Secondary IDs
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VFB:FBbt_00001586