Figure 8.

Effect of shared inputs on the transmission of firing rates. a, Schematic diagram representing the transmission of spiking activity across three layers of cortical neurons. Blue rectangle represents neurons projecting to both neurons in the third layer. κ indicates fraction of shared inputs. Black rectangle represents target neurons of a hypothetical regulatory process (e.g., attention) altering ρ_w and/or N_w of inputs to the third layer. b, φ_ν as a function of the fraction of shared inputs (κ) of two neurons in the third layer (see a; ρ_w = 0.2 and N_w = 1000). Grayscale dots indicate φ_ν values computed for each trial. Grayscale represents fraction of shared inputs κ (see color bar on top). Red crosses represent average across trials for each condition. Inset, Geometric mean across neurons of mean φ_ν values shown in the main panel.