part of medulla layer M6 medulla layer medulla sublayer M6B 2015-11-10T14:00:27Z fly_anatomy.ontology In the literature there are two methods for describing spatial location of neurons in the visual system: distal-proximal (e.g. Fischbach and Dittrich, 1989), and lateral-medial (e.g. Ito et al., 2014), both meaning outer and inner, respectively, and refer to the distance of a structure along the visual pathway relative to the center of the brain. Currently we will adopt the classical 'distal-proximal'. VFB:FBbt_00111270 FBbt:00111270 M6L Proximal sublayer of the medulla layer M6, proximal to layer M6A and distal to the serpentine layer (M7). It is defined by the extent of the arborization of Dm2 neurons proximally. lateral half of the M6 layer