has synaptic IO in region medulla layer M1 medulla layer M2 distal medullary amacrine neuron optic lobe wide-field columnar neuron distal medullary amacrine neuron Dm18 2015-11-10T14:00:27Z Dm18 FBbt:00111279 VFB:FBbt_00111279 Dm18 fly_anatomy.ontology Distal medullary wide-field amacrine neuron whose cell body is located in the cell body rind of the medulla. Its primary neurite branches in the boundary between M1 and M2 layers, in the same sublayer as Dm1. The arbors form a grid-like arrangement and cover around 50-100 columns. The arbor is located in a peripheral intracolumnar position. There are around 20 Dm18 neurons per hemisphere.