FB2026_03 , released September 17, 2026
CV Term Report
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Term descending neuron of the posterior brain DNp02 ID (Ontology) FBbt:00047635 (Fly Anatomy)
Definition Fruitless-expressing descending neuron belonging to the DNp group, having a large cell body posterior to the posterior lateral protocerebrum (Kimura et al., 2008; Matsuo et al., 2016; Namiki et al., 2018). In the brain, its postsynapses are found in the ipsilateral antennal mechanosensory and motor center zones A and B, wedge and the LC4 glomerulus of the posterior ventrolateral protocerebrum (Matsuo et al., 2016). It has presynapses in the gnathal ganglion and saddle (Matsuo et al., 2016). It does not cross the midline and descends on the ipsilateral side of the cervical connective (Namiki et al., 2018). In the VNC it follows the ventral medial tract of the ventral cervical fascicle and innervates the intermediate and lower tectulum, and the T2 leg neuropil (Namiki et al., 2018). It receives looming stimulus input from anterior LC4 neurons and its activity results in a backwards leaning posture and backwards takeoff (Dombrovski et al., 2023). There is one of these cells per hemisphere (Matsuo et al., 2016; Namiki et al., 2018) and it is cholinergic (Cheong et al., 2024).[ FlyBase:FBrf0205974 FlyBase:FBrf0230862 FlyBase:FBrf0239335 FlyBase:FBrf0255530 ]
Also Known As"AMMC-P3b" ; "antennal mechanosensory and motor center AMMC P3b neuron" ; "DNlt003" (for all, see Synonyms field below)
CommentNamiki et al. (2018), identify this as being morphologically similar to the lateral giant descending neuron, described by Milde and Strausfeld (1990) (FBrf0239829).
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VFB:FBbt_00047635
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 descending neuron of the posterior brain DNp02 (all annotations which use CV term, excluding "NOT" statements)
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adult nervous system
 |__adult central nervous system______________
central nervous system                        |
 |__adult central nervous system______________|
neuron                                        |
 |__fruitless expressing neuron_______________|
cholinergic neuron                            |
 |__adult cholinergic neuron__________________|
adult neuron                                  |
 |__adult cholinergic neuron__________________|
adult descending neuron                       |
 |__descending neuron of the posterior brain__|
CNS neuron                                    |
 |__supraesophageal ganglion neuron___________|
adult CNS neuron                              |
 |__descending neuron of the posterior brain__|
                                              descending neuron of the posterior brain DNp02  21 rec.
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Is a supraesophageal ganglion neuron
fruitless expressing neuron
descending neuron of the posterior brain
adult cholinergic neuron
Part of adult central nervous system
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VFB:FBbt_00047635