has soma location develops from receives synaptic input in region sends synaptic output to region adult optic lobe neuron medulla layer M9 proximal medullary amacrine neuron proximal medullary amacrine neuron Pm1 Proximal medullary wide-field amacrine neuron that branches as it enters the proximal side of the medulla and forms broad terminal arbors, with mixed pre- and post-synaptic terminals, mainly in medulla layer M9 (Fischbach and Dittrich, 1989; Morante and Desplan, 2008). FBbt:00003833 VFB:FBbt_00003833 Neurotransmitter determined to be acetylcholine based on Cha-GAL4.7.4 driver (FBtp0014830) expression and anti-ChaT staining (Varija Raghu et al., 2011 - FBrf0212356), but scRNAseq data assigns as GABA based on Gad1 transcripts and lineage (Konstantinides et al., 2022 - FBrf0253187). EM also predicts GABA (Nern et al., 2025 - FBrf0262545). Nern et al. (2025) split this into 3 subtypes (Pm1, Pm5, Pm6), which seem to have small differences in layer and column spans. fly_anatomy.ontology Pm06 FlyBrain_NDB:10109 Pm1 Pm01 Pm5 Pm6 Pm1 Pm02 Notch OFF hemilineage secondary neuron immature proximal medullary amacrine neuron Pm1 cell body rind of adult medulla optic lobe wide-field columnar neuron