Differences between control animals (white) and animals with peritonitis (black) at baseline, 6 hours, 18 hours and 27 hours after induction of sepsis. (A) CMAP duration, (B) stimulus intensity to evoke an amplitude of 50% maximal CMAP. Boxes indicate interquartile ranges and lines indicate median values. Comparisons between control and peritonitis animals were made with Welch rank test (NS = P >0.05, * = P <0.05). CMAP, compound muscle action potential.