FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
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
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     158
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       2
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      29
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      56
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 larval intersegmental nerve branch ISNb of A1-7 (all annotations which use CV term, excluding "NOT" statements)     158      4     31     56
     larval intersegmental nerve branch ISNb of A1-7 | embryonic stage      79       --       8     28
     larval intersegmental nerve branch ISNb of A1-7 | embryonic stage 17       3       --       3       --
     larval intersegmental nerve branch ISNb of A1-7 | heat sensitive       1       --       --       --
     larval intersegmental nerve branch ISNb of A1-7 | maternal effect       2       --       --       --
Spanning Tree (Parents/Children)
Only view relationship: 
  abdominal nerve
   |__larval abdominal nerve
       |__larval intersegmental nerve branch ISNb of A1-7  249 rec.
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Is a larval abdominal nerve
Part of larval abdominal intersegmental nerve
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Synonyms
Secondary IDs
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VFB:FBbt_00007326