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General Information
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| 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). |
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Links to External Ontologies
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VFB:FBbt_00003763
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Annotations
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
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| Data Class | Field | Records |
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| Alleles (FBal) | PHENOTYPE_MANIFEST_IN | 48 | | Insertions (FBti) | EXPRESSION_STAGE_TISSUE_POSITION | 12 | | Insertions (FBti) | PHENOTYPE_MANIFEST_IN | 5 | | Constructs (FBtp) | PHENOTYPE_MANIFEST_IN | 34 |
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Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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| Full annotation statements | Relevant FlyBase reports |
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| Alleles | | Genes | Insertions | Constructs |
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l-LNv neuron (all annotations which use CV term, excluding "NOT" statements) | 51 | 5 | 22 | 17 | 81 | l-LNv neuron | adult stage | 21 | -- | -- | 3 | 15 | l-LNv neuron | conditional | 4 | -- | -- | 1 | 3 | l-LNv neuron | heat sensitive | 2 | -- | -- | -- | 2 | l-LNv neuron | P-stage | 1 | -- | -- | -- | -- | l-LNv neuron | RU486 conditional | 2 | -- | -- | -- | 2 |
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Relationships