FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term lobula columnar neuron LC4 ID (Ontology) FBbt:00003874 (Fly Anatomy)
Definition Lobula columnar neuron whose cell body is in an extended region of the lateral cell body rind (Wu et al., 2016). It has its main dendritic arbors in lobula layers 2 and 4 (Wu et al., 2016; Tanaka and Clark, 2022). Its arbors span approximately 40 optic columns, overlapping with other LC4 cells (Wu et al., 2016). It projects to an optic glomerulus in the PVLP that is medial to the one from LC12 and ventral to LPLC2 and LPLC1 (Wu et al., 2016). There are an estimated 66 neurons of this type (Wu et al., 2016). It has been reported as being both glutamatergic (Raghu and Borst, 2011) and cholinergic (Davis et al., 2020).[ FlyBase:FBrf0049410 FlyBase:FBrf0193607 FlyBase:FBrf0213690 FlyBase:FBrf0234700 FlyBase:FBrf0244935 FlyBase:FBrf0253297 ]
Also Known As "ColA" ; "LC04" ; "LC4" (for all, see Synonyms field below)
Comment The glutamate neurotransmitter was assessed by labelling cells with a vGlut[CNSIII]-GAL4 driver (FBti0129148) (Raghu and Borst, 2011). The acetylcholine neurotransmitter was assessed by scRNAseq detection of choline acetyltransferase (FBgn0000303) and vesicular acetylcholine transporter (FBgn0270928) expression (Davis et al., 2020). Otsuna states that lcn4 innervates an optic glomerulus in the vlpr and vlpr maps to the VLP in Ito et al. (2014). Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB and with a presynaptic marker (synaptotagmin-HA driver) (Wu et al., 2016).
Links to External Ontologies
VFB:FBbt_00003874
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Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       6
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   Insertions Constructs
 lobula columnar neuron LC4 (all annotations which use CV term, excluding "NOT" statements)       3      2      6     11
Spanning Tree (Parents/Children)
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adult optic lobe columnar neuron
 |__lobula columnar neuron_________________
 |__optic lobe wide-field columnar neuron__|
cholinergic neuron                         |
 |__adult cholinergic neuron_______________|
adult neuron                               |
 |__adult cholinergic neuron_______________|
 |__adult glutamatergic neuron_____________|
adult visual projection neuron             |
 |__lobula columnar neuron_________________|
glutamatergic neuron                       |
 |__adult glutamatergic neuron_____________|
                                           lobula columnar neuron LC4  22 rec.
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Is a lobula columnar neuron
adult cholinergic neuron
adult glutamatergic neuron
optic lobe wide-field columnar neuron
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FlyBrain_NDB:10001
VFB:FBbt_00003874