has fasciculating neuron projection innervates protocerebral bridge glomerulus 2 protocerebral bridge glomerulus 3 commissure pb-fb tract pb-fb tract Z Tract of the adult central complex that contains columnar neurons of lineage DM1 (neuroblast Z) and innervates the most medial three protocerebral bridge glomeruli (1, 2 and 3) and the lateral contralateral fan-shaped body (Hanesch et al., 1989; Boyan et al., 2017). VFB:FBbt_00007506 fly_anatomy.ontology FBbt:00007506 adult DM1 lineage neuron protocerebral bridge glomerulus 1