FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term first optic chiasma ID (Ontology) FBbt:00005810 (Fly Anatomy)
Definition Chiasma lying between the lamina and medulla of the optic lobe (Ito et al., 2014). Axons reverse the anterior-posterior order between the lamina and the medulla, with axons from the anterior lamina cartridges projecting to the posterior medulla columns (Ito et al., 2014).[ FlyBase:FBrf0049410 FlyBase:FBrf0224194 ]
Also Known As "first optic chiasm" ; "OCH1" ; "outer optic chiasm"
Comment
Links to External Ontologies
VFB:FBbt_00005810
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
Alleles (FBal)  PHENOTYPE_MANIFEST_IN       4
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       3
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Constructs
 first optic chiasma (all annotations which use CV term, excluding "NOT" statements)       4      4      3
     first optic chiasma | adult stage       2       --       2
     first optic chiasma | adult stage | progressive       2       --       2
Spanning Tree (Parents/Children)
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  chiasma
   |__optic chiasma
       |__first optic chiasma  19 rec.
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Synonyms
  • "first optic chiasm" EXACT
    "OCH1" EXACT BRAIN_NAME_ABV[ FlyBase:FBrf0224194 ]
    "outer optic chiasm" EXACT
Secondary IDs
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VFB:FBbt_00005810