FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term larval A1-7-innervating SN motor neuron ID (Ontology) FBbt:00110214 (Fly Anatomy)
Definition Motor neuron that innervates the muscles of larval abdominal segments A1-7 and which fasciculates with the segmental nerve. Its soma is located in the same segment as the muscle it innervates. The dendritic domain of the motor neuron is located posteriorly to the dendritic domain of the ISN motor neurons.[ FlyBase:FBrf0064793 FlyBase:FBrf0099344 FlyBase:FBrf0112030 FlyBase:FBrf0167986 ]
Comment There is little or no published literature specifically on innervation in A1 and so where equivalent muscles are present between A1 and A2-7 (Landgraf et al., 1997; Schmid et al., 1999), we infer A1 motor neuron innervation patterns from those of A2-7. Almost all motor neurons that fasciculate with the segmental nerve have their soma located in the same segment in which the muscles they project to are located. There are two exceptions: DA2 motorneuron and VUM motor neuron (Landgraf et al., 1997).
Links to External Ontologies
VFB:FBbt_00110214
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 larval A1-7-innervating SN motor neuron (all annotations which use CV term, excluding "NOT" statements)       1
Spanning Tree (Parents/Children)
Only view relationship: 
larval neuron
 |__larval abdominal segmental nerve neuron__
larval efferent neuron                       |
 |__embryonic/larval motor neuron____________|
primary motor neuron                         |
 |__embryonic/larval motor neuron____________|
                                             larval A1-7-innervating SN motor neuron  7 rec.
                                              |__larval A1-7-innervating lateral VUM motor neuron 3 rec.
                                              |   |__larval lateral VUM motor neuron of abdominal 1 neuromere 3 rec.
                                              |   |__larval lateral VUM motor neuron of abdominal 2 neuromere 3 rec.
                                              |   |__larval lateral VUM motor neuron of abdominal 3 neuromere 3 rec.
                                              |   |__larval lateral VUM motor neuron of abdominal 4 neuromere 3 rec.
                                              |   |__larval lateral VUM motor neuron of abdominal 5 neuromere 3 rec.
                                              |   |__larval lateral VUM motor neuron of abdominal 6 neuromere 3 rec.
                                              |   |__larval lateral VUM motor neuron of abdominal 7 neuromere 3 rec.
                                              |__larval A1-7-innervating LO1 motor neuron
                                              |   |__larval LO1 motor neuron of abdominal 1 neuromere
                                              |   |__larval LO1 motor neuron of abdominal 2 neuromere
                                              |   |__larval LO1 motor neuron of abdominal 3 neuromere
                                              |   |__larval LO1 motor neuron of abdominal 4 neuromere
                                              |   |__larval LO1 motor neuron of abdominal 5 neuromere
                                              |   |__larval LO1 motor neuron of abdominal 6 neuromere
                                              |   |__larval LO1 motor neuron of abdominal 7 neuromere
                                              |__larval A1-7-innervating LT1/LT2 motor neuron
                                              |   |__larval LT1/LT2 motor neuron of abdominal 1 neuromere
                                              |   |__larval LT1/LT2 motor neuron of abdominal 2 neuromere
                                              |   |__larval LT1/LT2 motor neuron of abdominal 3 neuromere
                                              |   |__larval LT1/LT2 motor neuron of abdominal 4 neuromere
                                              |   |__larval LT1/LT2 motor neuron of abdominal 5 neuromere
                                              |   |__larval LT1/LT2 motor neuron of abdominal 6 neuromere
                                              |   |__larval LT1/LT2 motor neuron of abdominal 7 neuromere
                                              |__larval A1-7-innervating LT2/LT3 motor neuron 1 rec.
                                              |   |__larval LT2/LT3 motor neuron of abdominal 1 neuromere
                                              |   |__larval LT2/LT3 motor neuron of abdominal 2 neuromere
                                              |   |__larval LT2/LT3 motor neuron of abdominal 3 neuromere
                                              |   |__larval LT2/LT3 motor neuron of abdominal 4 neuromere
                                              |   |__larval LT2/LT3 motor neuron of abdominal 5 neuromere
                                              |   |__larval LT2/LT3 motor neuron of abdominal 6 neuromere
                                              |   |__larval LT2/LT3 motor neuron of abdominal 7 neuromere
                                              |__larval A1-7-innervating LT3 motor neuron 1 rec.
                                              |   |__larval LT3 motor neuron of abdominal 1 neuromere
                                              |   |__larval LT3 motor neuron of abdominal 2 neuromere
                                              |   |__larval LT3 motor neuron of abdominal 3 neuromere
                                              |   |__larval LT3 motor neuron of abdominal 4 neuromere
                                              |   |__larval LT3 motor neuron of abdominal 5 neuromere
                                              |   |__larval LT3 motor neuron of abdominal 6 neuromere
                                              |   |__larval LT3 motor neuron of abdominal 7 neuromere
                                              |__larval A1-7-innervating LT3/LT4 motor neuron
                                              |   |__larval LT3/LT4 motor neuron of abdominal 1 neuromere
                                              |   |__larval LT3/LT4 motor neuron of abdominal 2 neuromere
                                              |   |__larval LT3/LT4 motor neuron of abdominal 3 neuromere
                                              |   |__larval LT3/LT4 motor neuron of abdominal 4 neuromere
                                              |   |__larval LT3/LT4 motor neuron of abdominal 5 neuromere
                                              |   |__larval LT3/LT4 motor neuron of abdominal 6 neuromere
                                              |   |__larval LT3/LT4 motor neuron of abdominal 7 neuromere
                                              |__larval A1-7-innervating SBM motor neuron 1 rec.
                                              |   |__larval SBM motor neuron of abdominal 1 neuromere
                                              |   |__larval SBM motor neuron of abdominal 2 neuromere
                                              |   |__larval SBM motor neuron of abdominal 3 neuromere
                                              |   |__larval SBM motor neuron of abdominal 4 neuromere
                                              |   |__larval SBM motor neuron of abdominal 5 neuromere
                                              |   |__larval SBM motor neuron of abdominal 6 neuromere
                                              |   |__larval SBM motor neuron of abdominal 7 neuromere
                                              |__larval A1-7-innervating VA1 motor neuron 1 rec.
                                              |   |__larval VA1 motor neuron of abdominal 1 neuromere
                                              |   |__larval VA1 motor neuron of abdominal 2 neuromere
                                              |   |__larval VA1 motor neuron of abdominal 3 neuromere
                                              |   |__larval VA1 motor neuron of abdominal 4 neuromere
                                              |   |__larval VA1 motor neuron of abdominal 5 neuromere
                                              |   |__larval VA1 motor neuron of abdominal 6 neuromere
                                              |   |__larval VA1 motor neuron of abdominal 7 neuromere
                                              |__larval VA2 motor neuron
                                              |   |__larval VA2 motor neuron of abdominal 1 neuromere
                                              |   |__larval VA2 motor neuron of abdominal 2 neuromere
                                              |   |__larval VA2 motor neuron of abdominal 3 neuromere
                                              |   |__larval VA2 motor neuron of abdominal 4 neuromere
                                              |   |__larval VA2 motor neuron of abdominal 5 neuromere
                                              |   |__larval VA2 motor neuron of abdominal 6 neuromere
                                              |   |__larval VA2 motor neuron of abdominal 7 neuromere
                                              |__larval VA3 motor neuron
                                                  |__larval VA3 motor neuron of abdominal 1 neuromere
                                                  |__larval VA3 motor neuron of abdominal 2 neuromere
                                                  |__larval VA3 motor neuron of abdominal 3 neuromere
                                                  |__larval VA3 motor neuron of abdominal 4 neuromere
                                                  |__larval VA3 motor neuron of abdominal 5 neuromere
                                                  |__larval VA3 motor neuron of abdominal 6 neuromere
                                                  |__larval VA3 motor neuron of abdominal 7 neuromere
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Is a larval abdominal segmental nerve neuron
embryonic/larval motor neuron
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Synonyms
  • "motor neuron of external muscle" RELATED[ FlyBase:FBrf0099344 ]
    "SN motor neuron of A1-7" RELATED
Secondary IDs
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VFB:FBbt_00110214