part of develops from medulla anlage adult optic lobe medulla FBbt:00003748 The second optic neuropil, sandwiched between the lamina and the lobula complex. It is divided into 10 layers: 1-6 make up the outer (distal) medulla, the seventh (or serpentine) layer exhibits a distinct architecture and layers 8-10 make up the inner (proximal) medulla (Ito et al., 2014). ME fly_anatomy.ontology VFB:FBbt_00003748 optic medulla https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acda/10213501/ccb19d89b056/iyad064f6.jpg Nern et al. (2025) - FBrf0262545 say distal is M1-5 and M6-7 is central medulla. m Med anterior ectoderm derivative synaptic neuropil domain