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General Information
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| Term |
transmedullary neuron Tm20 |
ID (Ontology) |
FBbt:00003808 (Fly Anatomy) |
| Definition |
Transmedullary neuron that has dendritic arborization in medulla layers M1-M3, as well as presynaptic sites in M8 (Fischbach and Dittrich, 1989; Gao et al., 2008). In the medulla, it spans just one column (Kind et al., 2021), and receives input from lamina monopolar neuron L3 (Takemura et al., 2013) and an R8 photoreceptor (Kind et al., 2021). Its axon follows the anterior edge of its cognate medulla column (Ting et al., 2014), then crosses the second optic chiasma and projects to lobula layer 5 (Fischbach and Dittrich, 1989; Gao et al., 2008). It provides input to the lobula intrinsic neuron Li4 via many synapses (Lin et al., 2016). It is a cholinergic neuron (Gao et al., 2008). There is usually one of these cells per optic column (Nern et al., 2025).[ FlyBase:FBrf0049410 FlyBase:FBrf0206213 FlyBase:FBrf0222324 FlyBase:FBrf0224196 FlyBase:FBrf0230403 FlyBase:FBrf0252485 FlyBase:FBrf0262545 ] |
| Also Known As |
"Tm20" |
| Comment |
Connectivity in the medulla based on EM (Takemura et al., 2013; Kind et al., 2021). Connectivity in the lobula was assessed by GRASP and double-labeling EM (Lin et al., 2016). Neurotransmitter was assessed using a cha-GAL4DBD driver (Gao et al., 2008). |
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Links to External Ontologies
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VFB:FBbt_00003808
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Annotations
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
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| Data Class | Field | Records |
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| Alleles (FBal) | PHENOTYPE_MANIFEST_IN | 5 | | Insertions (FBti) | EXPRESSION_STAGE_TISSUE_POSITION | 9 | | Insertions (FBti) | PHENOTYPE_MANIFEST_IN | 1 | | Constructs (FBtp) | PHENOTYPE_MANIFEST_IN | 2 |
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Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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| Full annotation statements | Relevant FlyBase reports |
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| Alleles | | Genes | | Insertions | Constructs |
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transmedullary neuron Tm20 (all annotations which use CV term, excluding "NOT" statements) | 6 | 5 | 2 | 8 | 10 | 14 | transmedullary neuron Tm20 | somatic clone | 3 | -- | -- | -- | 1 | -- |
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Relationships