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 DT1 motor neuron ID (Ontology) FBbt:00110278 (Fly Anatomy)
Definition Motor neuron developing from neuroblast NB3-2 lineage that innervates the dorsal transverse muscle 1 (DT1) of abdominal segments 1 to 7 (Landgraf et al., 1997). It exits the ventral nerve cord via the anterior intersegmental nerve root, fasciculates with the intersegmental nerve, and innervates the DT1 muscle with type Ib boutons (Landgraf et al., 1997; Hoang and Chiba, 2001). Although it innervates an external muscle, its soma is clustered with those of the internal muscle-innervating neurons in the segment anterior to the muscle it innervates (Landgraf et al., 2003). Its dendritic arborizations are found with those of other external muscle-innervating neurons, connected via a long posterior projection (Landgraf et al., 2003).[ FlyBase:FBrf0099344 FlyBase:FBrf0112030 FlyBase:FBrf0132289 FlyBase:FBrf0160715 FlyBase:FBrf0167986 FlyBase:FBrf0174847 FlyBase:FBrf0208790 ]
Also Known As "A1-7 MN-DT1" ; "A1-7 MN18-Ib"
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VFB:FBbt_00110278
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lineage NB3-2 primary motor neuron
 |__larval NB3-2 intersegmental nerve anterior root primary motor neuron__
larval abdominal intersegmental nerve neuron                              |
 |__larval A1-7-innervating ISN motor neuron______________________________|
embryonic/larval motor neuron                                             |
 |__larval NB3-2 intersegmental nerve anterior root primary motor neuron__|
 |__abdominal segment motor neuron________________________________________|
 |__larval external muscle motor neuron___________________________________|
 |__larval A1-7-innervating ISN motor neuron______________________________|
 |__larval DT1 motor neuron_______________________________________________|
type Ib motor neuron                                                      |
 |__larval DT1 motor neuron_______________________________________________|
                                                                          larval A1-7-innervating DT1 motor neuron
                                                                           |__larval DT1 motor neuron of abdominal 1 neuromere
                                                                           |__larval DT1 motor neuron of abdominal 2 neuromere
                                                                           |__larval DT1 motor neuron of abdominal 3 neuromere
                                                                           |__larval DT1 motor neuron of abdominal 4 neuromere
                                                                           |__larval DT1 motor neuron of abdominal 5 neuromere
                                                                           |__larval DT1 motor neuron of abdominal 6 neuromere
                                                                           |__larval DT1 motor neuron of metathoracic neuromere
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Is a larval NB3-2 intersegmental nerve anterior root primary motor neuron
abdominal segment motor neuron
larval external muscle motor neuron
larval A1-7-innervating ISN motor neuron
larval DT1 motor neuron
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VFB:FBbt_00110278