Cholinergic modulation effects during a stimulus period. (A) LFP, spikes, STA and STA power of attended-in and attended-out group calculated for the superficial layer, when the excitatory connections and inhibitory connections to each pyramidal neuron in the attended-in group within in layer 2/3 and layer 5/6 are reduced to zero, geej = 0 mS geij = 0 mS. (B) STA power spectra of attended-in and attended-out groups calculated for the superficial layer under different modulation conditions. Note the different scales in the y axes, and see text for further details