FB2026_03 , released September 17, 2026
CV Term Report
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Term vertical system neuron 4 ID (Ontology) FBbt:00007520 (Fly Anatomy)
Definition Vertical system neuron with both dorsally and ventrally sweeping major branches and whose dorsal dendritic tree extends anteriorly and posteriorly. Unlike VS3, its dorsal dendrites curve so that they extend directly dorsally or even medially and have only a few simple anterior projections (Scott et al., 2002). Its receptive field of vision is in between the receptive fields of VS3 (more frontal) and VS5 (more lateral). It is electrically coupled to VS3 and VS5 (Joesch et al., 2008).[ FlyBase:FBrf0155898 FlyBase:FBrf0204334 ]
Also Known As"LPT08" ; "VS4" ; "VS4 neuron"
CommentElectrical coupling was shown indirectly by neurobiotin dye coupling in vertical system cells labelled using the P\{GAL4\}DB331 driver (FBti0115113) (Joesch et al., 2008). Due to its morphology and functional similarity, this cell is judged to be homologous to the VS2-VS6 cells in the blowfly (Scott et al., 2002).
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VFB:FBbt_00007520
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lobula plate giant neuron_______
adult visual projection neuron__|
                                vertical system neuron
                                 |__vertical system neuron 4  1 rec.
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VFB:FBbt_00007520