Figure 5

Activation and inactivation I-V curves (mean of I₁ or I₂ ±standard error of mean (SEM) against each V₁ excursion) for the (i) control condition prior to addition of caffeine, and (ii), 11–25 minutes and (iii) 26–40 minutes after addition of 0.5 mM caffeine using an expanded range of V₁ in the absence of dantrolene.