Fig. 4.

Acetylcholine decreases the correlations’ slope. We measured the slope between signal correlations and noise correlations. Recent work suggests that this variable is fundamental in determining the encoding efficiency of a network. (Top) Relationship between signal and noise correlations in the cholinergic stimulation (ACh) and control conditions (example for a representative bin size, as indicated by the vertical bar shown at the Bottom). (Bottom) The correlations’ slope is depicted across bin sizes; acetylcholine decreases the correlations’ slope (P < 0.005).