FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term larval A02j neuron ID (Ontology) FBbt:00111681 (Fly Anatomy)
Definition Larval period-positive median segmental interneuron (PMSI) (Kohsaka et al., 2019) that is early-born in the NB2-1 Notch ON primary hemilineage (Mark et al., 2021). Like other PMSIs it has a ventral soma and it extends dorsally, close to the midline, then forms a loop in the dorsal neuropil (Kohsaka et al., 2019). This neuron has relatively dense arborization at the lateral and dorsal parts of the loop and extends a long projection anteriorly (Kohsaka et al., 2019). It outputs to GDL neurons of the two segments anterior to itself, and motor neurons of its own segment (Fushiki et al., 2016).[ FlyBase:FBrf0231611 FlyBase:FBrf0242656 FlyBase:FBrf0249021 ]
Also Known As "looper-10"
Comment These neurons were identified in a EM reconstruction of the full CNS of a 6h old first instar larva. The number of output synapses was the following (number in brackets left/right): to GDL - one segment posterior (7), to GDL - two segments posterior (4/2), to A02l (2/-) (Fushiki et al., 2016).
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VFB:FBbt_00111681
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lineage NB2-1 primary interneuron
 |__period-positive median segmental interneuron__
neuron                                            |
 |__abdominal neuron______________________________|
Notch ON hemilineage primary neuron               |
 |__NB2-1 Notch ON hemilineage primary neuron_____|
NB2-1 lineage primary neuron                      |
 |__NB2-1 Notch ON hemilineage primary neuron_____|
larval premotor neuron                            |
 |__period-positive median segmental interneuron__|
larval interneuron                                |
 |__period-positive median segmental interneuron__|
larval glutamatergic neuron                       |
 |__period-positive median segmental interneuron__|
                                                  larval A02j neuron
                                                   |__larval abdominal 1 A02j neuron
                                                   |__larval abdominal 2 A02j neuron
                                                   |__larval abdominal 3 A02j neuron
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Is a abdominal neuron
NB2-1 Notch ON hemilineage primary neuron
period-positive median segmental interneuron
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VFB:FBbt_00111681