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 ventral VUM motor neuron ID (Ontology) FBbt:00002247 (Fly Anatomy)
Definition Neuromodulatory motor neuron that innervates the internal ventral oblique (VO1,2,4,5,6) and ventral longitudinal (VL1,2) muscles of larval abdominal segments A1 to A7 (except VO6, which is only present in A2-7) via type II boutons (Hoang and Chiba, 2001). It exits the ventral nerve cord via the posterior root of the intersegmental nerve and fasciculates with the ISNb or ISNd intersegmental nerve branches. These neurons have a similar central arborization pattern to the dorsal and lateral VUM neurons of A1-7. They arborize along and dorsal to the dorsal median fascicle and laterally along the dorsal lateral fascicle, invading the next anterior neuromere. In the dorsomedial neuropil, arborizations are sent into at least two (usually three) anterior neuromeres and the adjacent posterior neuromere (Selcho et al., 2012).[ FlyBase:FBrf0099344 FlyBase:FBrf0112030 FlyBase:FBrf0132289 FlyBase:FBrf0160715 FlyBase:FBrf0167986 FlyBase:FBrf0174847 FlyBase:FBrf0208790 FlyBase:FBrf0219406 ]
Also Known As "A1-7 MNSNb/d-II" ; "A1-7 ventral MN-VUM" ; "abdominal ventral VUM motor neuron" (for all, see Synonyms field below)
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VFB:FBbt_00002247
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Spanning Tree (Parents/Children)
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larval abdominal intersegmental nerve neuron
 |__larval A1-7-innervating ISN motor neuron__
neuron                                        |
 |__abdominal neuron__________________________|
embryonic/larval motor neuron                 |
 |__abdominal segment motor neuron____________|
 |__larval A1-7-innervating ISN motor neuron__|
larval internal muscle motor neuron           |
 |__larval ventral VUM motor neuron___________|
larval VUM motor neuron                       |
 |__larval ventral VUM motor neuron___________|
                                              larval A1-7-innervating ventral VUM motor neuron  3 rec.
                                               |__larval ventral VUM motor neuron of abdominal 1 neuromere 3 rec.
                                               |__larval ventral VUM motor neuron of abdominal 2 neuromere 3 rec.
                                               |__larval ventral VUM motor neuron of abdominal 3 neuromere 3 rec.
                                               |__larval ventral VUM motor neuron of abdominal 4 neuromere 3 rec.
                                               |__larval ventral VUM motor neuron of abdominal 5 neuromere 3 rec.
                                               |__larval ventral VUM motor neuron of abdominal 6 neuromere 3 rec.
                                               |__larval ventral VUM motor neuron of abdominal 7 neuromere 3 rec.
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Is a abdominal neuron
abdominal segment motor neuron
larval A1-7-innervating ISN motor neuron
larval ventral VUM motor neuron
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Synonyms
  • "A1-7 MNSNb/d-II" EXACT[ FlyBase:FBrf0132289 ]
    "A1-7 ventral MN-VUM" EXACT
    "abdominal ventral VUM motor neuron" EXACT
    "abdominal VUM2 neuron" EXACT
Secondary IDs
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VFB:FBbt_00002247