FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term larval intersegmental nerve branch ISNb of A1-7 ID (Ontology) FBbt:00007326 (Fly Anatomy)
Definition A ventral branch of the intersegmental nerve of segments A1-7 that exits the ventral nerve cord through the anterior root of the intersegmental nerve. Its branching point is dorsal to that of ISNd. It consists mostly of motorneuron axons whose soma is located in the next anterior segment, which innervate various ventral somatic muscles including muscles VO1-3 and VL1.[ FlyBase:FBrf0089570 FlyBase:FBrf0099344 FlyBase:FBrf0193012 ]
Also Known As "ISNb" ; "SNb"
Comment ISNd could be considered a branch of ISNb, which is in turn a branch of ISN (Landgraf et al., 1997).
Links to External Ontologies
VFB:FBbt_00007326
Annotations
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Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 larval intersegmental nerve branch ISNb of A1-7 (all annotations which use CV term, excluding "NOT" statements)
     larval intersegmental nerve branch ISNb of A1-7 | embryonic stage
      --
     larval intersegmental nerve branch ISNb of A1-7 | embryonic stage 17
      --
      --
     larval intersegmental nerve branch ISNb of A1-7 | heat sensitive
      --       --       --
     larval intersegmental nerve branch ISNb of A1-7 | maternal effect
      --       --       --
Spanning Tree (Parents/Children)
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Vocabulary search
larval abdomen
 |__larval abdominal nerve_________________
larval intersegmental nerve                |
 |__larval abdominal intersegmental nerve__|
abdominal nerve                            |
 |__larval abdominal nerve_________________|
larval peripheral nervous system           |
 |__larval abdominal nerve_________________|
larval abdominal segment A1-7              |
 |__larval abdominal intersegmental nerve__|
larval abdominal nerve                     |
 |__larval abdominal intersegmental nerve__|
                                           larval intersegmental nerve branch ISNb of A1-7  245 rec.
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Is a larval abdominal nerve
Part of larval abdominal intersegmental nerve
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VFB:FBbt_00007326