FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term proximal medullary amacrine neuron Pm4 ID (Ontology) FBbt:00111282 (Fly Anatomy)
Definition Proximal medullary amacrine neuron that branches at the proximal surface of the medulla. It covers around 10-20 columns with its pre- and post-synapses mostly in layers M8-M9 (Nern et al., 2025). It occupies a central intracolumnar position. It is GABAergic (Davis et al., 2020). There are around 75-85 of these neurons per hemisphere (Nern et al., 2025).[ FlyBase:FBrf0228639 FlyBase:FBrf0244935 FlyBase:FBrf0262545 ]
Also Known As "Pm05" ; "Pm4"
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VFB:FBbt_00111282
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Data Class Field Records
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
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 proximal medullary amacrine neuron Pm4 (all annotations which use CV term, excluding "NOT" statements)       1      9      1      9
Spanning Tree (Parents/Children)
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supraesophageal ganglion neuron
 |__adult optic lobe neuron_________________
optic lobe amacrine neuron                  |
 |__proximal medullary amacrine neuron______|
GABAergic neuron                            |
 |__adult GABAergic neuron__________________|
anterior ectoderm derivative                |
 |__adult optic lobe neuron_________________|
adult neuron                                |
 |__adult GABAergic neuron__________________|
secondary neuron                            |
 |__Notch OFF hemilineage secondary neuron__|
Notch OFF hemilineage neuron                |
 |__Notch OFF hemilineage secondary neuron__|
medulla intrinsic neuron                    |
 |__proximal medullary amacrine neuron______|
adult CNS neuron                            |
 |__adult optic lobe neuron_________________|
                                            proximal medullary amacrine neuron Pm4  20 rec.
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Is a adult optic lobe neuron
proximal medullary amacrine neuron
Notch OFF hemilineage secondary neuron
adult GABAergic neuron
Develops from immature proximal medullary amacrine neuron Pm4
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VFB:FBbt_00111282