FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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Term mushroom body output neuron 15 ID (Ontology) FBbt:00111010 (Fly Anatomy)
Definition A cholinergic mushroom body output neuron whose dendrites arborize unilaterally in alpha' lobe slice 1 (Aso et al., 2014), with thin dendritic branches projecting through the edge of the alpha' lobe slices 2 and 3 (Aso et al., 2014). Its axon projects to the contralateral hemisphere, sharing a tract with MBONs 16 and 17, terminating in the superior intermediate and lateral protocerebrum, and lateral horn (Aso et al., 2014). There are 4 neurons of this type in each hemisphere, forming two different connectivity patterns (Li et al., 2020). At least one of these subtypes comprises two DL1 (CP2) secondary neurons (Truman et al., 2023).[ FlyBase:FBrf0227179 FlyBase:FBrf0248215 FlyBase:FBrf0255928 ]
Also Known As "MBON-15" ; "MBON-alpha'1" ; "MBON15"
Comment Two of these cells were identified by Aso et al. (2014), a further two were added by Li et al. (2020) due to similar morphology. The additional neurons are referred to as "MBON15-like", but still classed as MBON15 neurons (Li et al., 2020). Truman et al. (2023) say two per hemisphere - probably original two.
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VFB:FBbt_00111010
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 mushroom body output neuron 15 (all annotations which use CV term, excluding "NOT" statements)
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cholinergic neuron
 |__adult cholinergic neuron___________________
adult neuron                                   |
 |__adult cholinergic neuron___________________|
adult mushroom body output neuron              |
 |__adult typical mushroom body output neuron__|
adult interneuron                              |
 |__adult lateral horn input neuron____________|
input/output neuron                            |
 |__adult lateral horn input neuron____________|
CNS neuron                                     |
 |__supraesophageal ganglion neuron____________|
                                               mushroom body output neuron 15  17 rec.
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Is a supraesophageal ganglion neuron
adult lateral horn input neuron
adult typical mushroom body output neuron
adult cholinergic neuron
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VFB:FBbt_00111010