Figure 1.

The Drosophila central complex and derived architecture of the computational model. (A) Confocal image (color inverted) of a dissected adult Drosophila brain immuno-labeled with an antibody that specifically recognizes synaptic terminals. (B) Cartoon of adult Drosophila brain showing central complex neuropils (PB, protocerebral bridge; FB, fan-shaped body; EB, ellipsoid body; NO, noduli; LAL, lateral accessory lobes—mushroom bodies are shown for orientation); box indicates enlarged region in C. (C) Schematic summary of PB and EB to show key assumptions of computational model: columnar wedge neurons project to specific EB wedges (here shown for one in black), tangential ring neurons project in a subtype and layer-specific manner into EB ring (colour coded); the model assumes synaptic connections between both neuron types (see enlarged area for one wedge). (D) Architecture of the neural model, replicating the local connectome of the central complex in the connections among modules.