FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
Help Close All Open All
General Information
Term l-LNv neuron ID (Ontology) FBbt:00003763 (Fly Anatomy)
Definition Neuron of the period-expressing LNv cluster of the adult brain, with a large cell body and generally located more dorsally than the s-LNv neurons (Helfrich-Forster, 1998). There are four of these cells per hemisphere, all of which express Pdf (Helfrich-Forster et al., 2007). These neurons send dendrites through the posterior optic commissure to the contralateral optic lobe, where a few short fibers terminate in the accessory medulla, but most arborize extensively in the medulla itself (Helfrich-Forster, 2005; Helfrich-Forster et al., 2007). These arborizations in the medulla are associated with varicosities. These cells also project to the ipsilateral (adjacent) accessory medulla and its ventral extension, where they arborize extensively.[ FlyBase:FBrf0101921 FlyBase:FBrf0134807 FlyBase:FBrf0151380 FlyBase:FBrf0183981 FlyBase:FBrf0193849 ]
Also Known As "l-LNv" ; "l-vLN" ; "large LNv" (for all, see Synonyms field below)
Comment While l-LNv neurons fit the definition of pacemaker neurons based on molecular oscillation of Period (FBgn0003068) and Timeless (FBgn0014396) expression, they do not sustain this molecular oscillation when kept in constant darkness (Yang and Sehgal, 2001; Shafer et al., 2002). Synaptobrevin localization supports the assertion that projections through the posterior optic commissure to the contralateral optic lobe are dendritic (Helfrich-Forster et al., 2007).
Links to External Ontologies
VFB:FBbt_00003763
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
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Split System Combinations Genes Insertions Constructs
 l-LNv neuron (all annotations which use CV term, excluding "NOT" statements)
     l-LNv neuron | adult stage
      --       --
     l-LNv neuron | conditional
      --       --
     l-LNv neuron | heat sensitive
      --       --       --
     l-LNv neuron | P-stage
      --       --       --       --
     l-LNv neuron | RU486 conditional
      --       --       --
Spanning Tree (Parents/Children)
Only view relationship:
Vocabulary search
LN period neuron
 |__LN Pdf neuron___________________
 |__LNv neuron______________________|
light-sensitive neuron              |
 |__LN Pdf neuron___________________|
neurosecretory cell of adult brain  |
 |__LN Pdf neuron___________________|
 |__LNv neuron______________________|
accessory medulla neuron            |
 |__LNv neuron______________________|
adult peptidergic neuron            |
 |__LNv neuron______________________|
adult sensory neuron                |
 |__LN Pdf neuron___________________|
adult Pdf neuron                    |
 |__LN Pdf neuron___________________|
                                    l-LNv neuron  176 rec.
                                     |__extra l-LNv neuron
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a LN Pdf neuron
LNv neuron
Part of
hide Synonyms & Secondary IDs
Synonyms
  • "l-LNv" EXACT VFB_SYMBOL
    "l-vLN" EXACT[ FlyBase:FBrf0209505 ]
    "large LNv" EXACT
    "large pigment-dispersing hormone-immunoreactive neuron close to medulla" EXACT
    "lLNv" EXACT
Secondary IDs
hide External Crossreferences & Linkouts
VFB:FBbt_00003763