Figure 1: Representation of the observed effect (horizontal axis) versus the predicted effect (vertical axis) for the cerebral state index (CSI), the electromyographic activity (EMG), and the burst suppression ratio (BS). The coefficients of determination between the predicted and observed effects are also shown. Dots represent pooled data from all animals ( ) and the black line represents the regression line for the effects observed versus effects predicted by the inhibitory sigmoid model.