FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term optic chiasma ID (Ontology) FBbt:00003921 (Fly Anatomy)
Definition The projection of axons between the lamina and medulla (first optic chiasma) or between the medulla and lobula (second optic chiasma). The linear order of axons along each horizontal row of retinotopic cartridges or columns is reversed by the chiasma.[ FlyBase:FBrf0224194 ]
Also Known As "OCH" ; "optic chiasm"
Comment
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VFB:FBbt_00003921
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Alleles Genes Insertions Constructs
 optic chiasma (all annotations which use CV term, excluding "NOT" statements)
     optic chiasma | adult stage
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tract
 |__chiasma__________________
multi-tissue structure       |
 |__adult optic lobe_________|
adult protocerebrum          |
 |__adult optic lobe_________|
visual system                |
 |__adult optic lobe_________|
adult primary visual center  |
 |__adult optic lobe_________|
                             optic chiasma  47 rec.
                              |__first optic chiasma 19 rec.
                              |   |__adult outer optic chiasma giant glial cell 8 rec.
                              |__second optic chiasma 8 rec.
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Is a chiasma
Part of adult optic lobe
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VFB:FBbt_00003921