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General Information
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| Term |
fan-shaped body |
ID (Ontology) |
FBbt:00003679 (Fly Anatomy) |
| Definition |
The largest synaptic neuropil domain of the adult central complex, located posterior to the ellipsoid body and anterior to the protocerebral bridge (Hanesch et al., 1989; Wolff et al., 2015). The fan-shaped body is composed of a rough 2-dimensional grid of layers and columns (Hanesch et al., 1998; Wolff et al., 2015; Hulse et al., 2021). Eight horizontal layers, numbered bottom to top, form a fan shape and can be divided into vertical columns (sometimes called staves, slices or segments) (Ito et al., 2014; Wolff et al., 2015). An additional, much narrower, 9th layer, which lacks a columnar organization, sits dorsal to layer 8 (Wolff et al., 2015). The number of columns varies for different neuronal types (Scheffer et al., 2020).[ FlyBase:FBrf0049409 FlyBase:FBrf0212649 FlyBase:FBrf0221742 FlyBase:FBrf0224194 FlyBase:FBrf0227801 FlyBase:FBrf0246888 FlyBase:FBrf0254510 ] |
| Also Known As |
"fan shaped body" ; "FB" ; "fb" |
| Comment |
Previously thought to be 8 slices per hemisphere numbered from 1-8 medial to lateral - arranged in 4 closely associated pairs (Ito et al., 2014). Each of the two neighboring slices (1-2, 3-4, 5-6, 7-8) are associated more closely because they receive small-field columnar neurons generated by the same neuroblasts, forming four groups on each side of the midline, from lateral to medial: segment pair W, X, Y and Z (Boyan and Williams, 2011; Ito and Awasaki, 2008). Six to nine layers can be identified, depending on the staining that is used (Hanesch et al., 1989; Young and Armstrong, 2010; Kahsai and Winther, 2011, Lin et al., 2013, Wolff et al., 2015). Recent papers divide the FB into 9 layers (Wolff et al., 2015; Scheffer et al., 2020). |
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Links to External Ontologies
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VFB:FBbt_00003679
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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 | 49 | | Insertions (FBti) | EXPRESSION_STAGE_TISSUE_POSITION | 94 | | Insertions (FBti) | PHENOTYPE_MANIFEST_IN | 7 | | Constructs (FBtp) | PHENOTYPE_MANIFEST_IN | 16 |
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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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fan-shaped body (all annotations which use CV term, excluding "NOT" statements) | 54 | 3 | 28 | 101 | 1616 | fan-shaped body | adult stage | 2 | -- | -- | -- | 1 | fan-shaped body | conditional | 2 | -- | -- | -- | 3 |
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Relationships