Comparison between the three models in their ability to account for the effects of changes in serum potassium levels on multiple measures of nerve excitability.

Data from Medium K data was fitted to nerve model, and then adjusted for different potassium levels according to Models 1, 2 and 3. Discrepancies score difference between model and recorded data and discrepancy reductions score improvement over no allowance for potassium. For each data set Model 3 provides lowest discrepancy (figures in bold).