Figure 2. Regression analysis of peak change in potassium concentrations in each animal (relative to baseline) after succinylcholine to acetylcholine receptor concentrations in the gastrocnemius muscle of the same animal. Each group is denoted by a different symbol with key to each group indicated in the figure. There was a significant positive correlation between peak potassium change and acetylcholine receptor concentration (R2= 0.66, r = 0.81, P < 0.01).