FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term mushroom body calyx arborizing neuron 1 ID (Ontology) FBbt:00100226 (Fly Anatomy)
Definition GABAergic neuron whose cell body is located in the posterior area of the lateral cell body region between the posteriolateral protocerebrum and the optic lobe of the adult brain (Tanaka et al., 2008; Aso et al., 2014). It is a secondary neuron that is part of the VPNp&v1 (BLP1) posterior hemilineage (Bates et al., 2020). It projects dorsally towards the lateral horn before branching, with one (dendritic) branch extensively arborizing in the ventral part of the lateral horn, and the other turning medially and terminating in the calyx (Tanaka et al., 2008; Aso et al., 2014; Dolan et al., 2019). There are approximately 2-3 of these cells per hemisphere (Aso et al., 2014; Dolan et al., 2019).[ FlyBase:FBrf0205263 FlyBase:FBrf0227179 FlyBase:FBrf0242628 FlyBase:FBrf0246460 ]
Also Known As "MB-C1"
Comment Mao and Davis (2009) - FBrf0208427 claim this is a PPL2ab neuron, but listed as distinct in Aso et al. (2014).
Links to External Ontologies
VFB:FBbt_00100226
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
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Relevant FlyBase reports
 Alleles  Insertions Constructs
 mushroom body calyx arborizing neuron 1 (all annotations which use CV term, excluding "NOT" statements)       1      5      1      7
Spanning Tree (Parents/Children)
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adult head
 |__adult brain__________________________________
adult central nervous system                     |
 |__adult brain__________________________________|
brain                                            |
 |__adult brain__________________________________|
neuron                                           |
 |__secondary neuron_____________________________|
GABAergic neuron                                 |
 |__adult GABAergic neuron_______________________|
adult neuron                                     |
 |__adult GABAergic neuron_______________________|
mushroom body modulatory input neuron            |
 |__adult mushroom body modulatory input neuron__|
adult lateral horn neuron                        |
 |__adult lateral horn output neuron_____________|
adult VPNp&v1 lineage clone                      |
 |__adult VPNp&v1 lineage neuron_________________|
adult interneuron                                |
 |__adult mushroom body modulatory input neuron__|
 |__adult lateral horn output neuron_____________|
input/output neuron                              |
 |__adult lateral horn output neuron_____________|
adult CNS neuron                                 |
 |__adult VPNp&v1 lineage neuron_________________|
BLP1 lineage neuron                              |
 |__adult VPNp&v1 lineage neuron_________________|
                                                 mushroom body calyx arborizing neuron 1  14 rec.
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Is a secondary neuron
adult mushroom body modulatory input neuron
adult lateral horn output neuron
adult VPNp&v1 lineage neuron
adult GABAergic neuron
Part of adult brain
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Synonyms
Secondary IDs
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FlyBrain_NDB:10451
VFB:FBbt_00100226