FB2026_03 , released September 17, 2026
CV Term Report
Help Close All Open All
General Information
Term medial intersegmental nerve root glial cell ID (Ontology) FBbt:00001305 (Fly Anatomy)
Definition Intersegmental nerve glial cell that is located at the medial end of the anterior branch of the intersegmental nerve root, above the lateral neuropil. It contacts both the perineurium and the cortex/neuropil interface and its position is slightly lateral to the B-SPG. It sends a process laterally along the nerve root, showing a characteristic triangular morphology. It develops from the NB1-3 neuroblast (Beckervordersandforth et al., 2008).[ FlyBase:FBrf0054242 FlyBase:FBrf0064795 FlyBase:FBrf0082171 FlyBase:FBrf0205499 FlyBase:FBrf0214261 ]
Also Known As"intersegmental glial cell 1" ; "ISG1" ; "M-ISNG" (for all, see Synonyms field below)
CommentThe medial intersegmental nerve root glial cell corresponds to segment boundary cell (SBC) described by Goodman and Doe (1993) and ISPG1 described by Klambt and Goodman (1991) (Ito et al., 1995).
Links to External Ontologies
VFB:FBbt_00001305
Annotations
Records annotated with this term OR any of its CHILD TERMS

Choose a record type to view annotations for this term and its child terms. Direct annotations and full annotation statements below also provide HitList buttons.

    • Results list data from multiple species. Choose a record type above to open its HitList.
Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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
 medial intersegmental nerve root glial cell (all annotations which use CV term, excluding "NOT" statements)
Spanning Tree (Parents/Children)
Only view relationship:
Vocabulary search 
germ layer derivative
 |__ectodermal derivative_________________
larval intersegmental nerve root          |
 |__intersegmental nerve root glial cell__|
larval VNC neuropil glial cell            |
 |__intersegmental nerve root glial cell__|
embryonic/larval lateral glial cell       |
 |__intersegmental nerve root glial cell__|
nerve root glial cell                     |
 |__intersegmental nerve root glial cell__|
                                          medial intersegmental nerve root glial cell  26 rec.
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a intersegmental nerve root glial cell
ectodermal derivative
Develops from neuroblast NB1-3
Part of
hide Synonyms & Secondary IDs
Synonyms
Secondary IDs
hide External Crossreferences & Linkouts
VFB:FBbt_00001305