FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term larval prothoracic intersegmental nerve ID (Ontology) FBbt:00002064 (Fly Anatomy)
Definition Larval intersegmental nerve of the prothoracic segment. Similar to the A1-A7 nerves, it has two roots; an anterior root that is formed by neurons of the anteriorly adjacent neuromere, and a posterior root, that is formed by neurons of the same neuromere as the nerve (Campos-Ortega and Hartenstein, 1997). Proximally it shares a glial sheath with the segmental nerve before branching from it at the border between the prothorax and mesothorax (Campos-Ortega and Hartenstein, 1997). It then bends anterolaterally and, upon leaving the surface of the ventral longitudinal muscle, receives a branch from the prothoracic lateral sensory cluster (Campos-Ortega and Hartenstein, 1997). Its main trunk continues dorsally and innervates the dorsal sensory cluster and dorsal musculature (Campos-Ortega and Hartenstein, 1997).[ FlyBase:FBrf0089570 ]
Also Known As"prothoracic anterior fascicle"
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VFB:FBbt_00002064
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 larval prothoracic intersegmental nerve (all annotations which use CV term, excluding "NOT" statements)
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prothoracic segment
 |__larval prothoracic segment____
 |__prothoracic nerve_____________|
larval thoracic segment           |
 |__larval prothoracic segment____|
nerve                             |
 |__larval intersegmental nerve___|
 |__prothoracic nerve_____________|
larval peripheral nervous system  |
 |__larval intersegmental nerve___|
                                  larval prothoracic intersegmental nerve  12 rec.
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Is a larval intersegmental nerve
prothoracic nerve
Part of larval prothoracic segment
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Synonyms
  • "ISN" BROAD
    "prothoracic anterior fascicle" EXACT
Secondary IDs
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VFB:FBbt_00002064