Figure 8.

(A) Schematic of the insect antennal lobe network. Neuron populations are grouped in glomeruli (outlined by dotted lines), which exert lateral inhibition onto each other. RNs, receptor neurons (input); PNs, projection neurons (output); LNs, inhibitory local neurons. Some connections are grayed out to emphasize the connection principle. (B) Correlation matrix of the input data. (C) Correlation matrix of the output spike rates (PNs) without lateral inhibition, q = 0.0. (D) Correlation of the output with homogeneous lateral inhibition, q = 1.0. (E) Average pairwise correlation between glomeruli [median ± 20th (black) and 80th (gray) percentile] in dependence of the overall strength of lateral inhibition q.