lobula plate layer 2 FBbt:00003887 layer Lop2 VFB:FBbt_00003887 back-to-front-layer fly_anatomy.ontology FBbt:00040019 Layer of the lobula plate that is second-closest to the second optic chiasm (Fischbach and Dittrich, 1989). Terminals of T4b and T5b are found in this layer (Fischbach and Dittrich, 1989). Neurons in this layer are sensitive to diagonal back-to-front motion, i.e. back top to front bottom or back bottom to front top (Henning et al., 2022). lobula plate layer B lobula plate layer