FB2026_03 , released September 17, 2026
CV Term Report
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Term larval mesothoracic VUM motor neuron ID (Ontology) FBbt:00047566 (Fly Anatomy)
Definition Octopaminergic VUM motor neuron with its cell body in the larval mesothoracic neuromere. There are three of these cells with very similar innervation patterns within the ventral nerve cord. The neuron projects dorsally, then branches laterally in both directions to form a T-shape. Ramifications are mostly found in the lateral neuropil of T2 and T1. It also innervates the anterior part of T3 with dorsomedial bifurcations. Generally, two of these neurons (tVUM2sn) project via the segmental nerve with the other projecting via the intersegmental nerve (tVUM2isn), but this is sometimes the opposite way (Selcho et al., 2012).[ FlyBase:FBrf0219406 ]
Also Known As"tVUM2 neuron"
CommentInnervation pattern has not been studied, so it is unclear how the three subclasses differ and whether they belong to the dorsal, lateral and ventral groups identified for abdominal neurons.
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VFB:FBbt_00047566
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larval VUM neuron
 |__larval VUM motor neuron____
thoracic neuron                |
 |__mesothoracic neuron________|
embryonic/larval motor neuron  |
 |__larval VUM motor neuron____|
type II motor neuron           |
 |__larval VUM motor neuron____|
larval octopaminergic neuron   |
 |__larval VUM motor neuron____|
larval tyraminergic neuron     |
 |__larval VUM motor neuron____|
larval glutamatergic neuron    |
 |__larval VUM motor neuron____|
                               larval mesothoracic VUM motor neuron
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larval VUM motor neuron
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VFB:FBbt_00047566