proximal medullary amacrine neuron VFB:FBbt_00003832 Pm An amacrine neuron that is intrinsic to the medulla and that branches and arborizes in the proximal medulla. Generally, the soma is located in the cortex adjacent to the medulla and that projects through the proximal surface of the medulla, to form wide (sometimes very wide) terminal arborizations mainly or completely restricted to a single layer of the medulla. fly_anatomy.ontology FBbt:00003832 Pm optic lobe amacrine neuron medulla intrinsic neuron