FB2026_03 , released September 17, 2026
CV Term Report
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Term Johnston organ bundle of antennal nerve ID (Ontology) FBbt:00100001 (Fly Anatomy)
Definition Bundle formed from the fasciculated axons of the Johnston's organ neurons (JONs) within the antennal nerve (AN). The JONs form two bundles (dorsolateral and medioventral) within the antennal nerve by the point it reaches the base of antennal segment 1 (a1/scape). Shortly before entering the brain, these two bundles combine and spread over a large area of the AN cross-section. Upon entering the brain, the JONs predominantly occupy the ventral part of the AN. At the ventrolateral side of the antennal lobe, the bundle bifurcates. One side of the bifurcation gives rise to the main trunk of the antennal mechanosensory and motor center (AMMC). The other side defasciculates and innervates zone A of the AMMC.[ FlyBase:FBrf0187921 FlyBase:FBrf0194812 ]
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VFB:FBbt_00100001
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Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 Johnston organ bundle of antennal nerve (all annotations which use CV term, excluding "NOT" statements)
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adult head
 |__adult antennal nerve_________
nerve                            |
 |__supraesophageal nerve________|
adult peripheral nervous system  |
 |__adult antennal nerve_________|
antennal nerve                   |
 |__adult antennal nerve_________|
                                 Johnston organ bundle of antennal nerve  1 rec.
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Is a supraesophageal nerve
Part of adult antennal nerve
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Synonyms
  • "Johnston organ nerve" RELATED
    "Johnston organ neuron nerve" RELATED
    "Johnston's organ nerve" RELATED
    "Johnston's organ neuron nerve" RELATED
    "JON nerve" RELATED[ FlyBase:FBrf0187921 FlyBase:FBrf0194812 ]
Secondary IDs
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VFB:FBbt_00100001