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. 2002 Oct 18;545(Pt 2):671–679. doi: 10.1113/jphysiol.2002.025064

Figure 3.

Figure 3

A, the occurrence of self-sustained firing (SSF) across all trials. The frequency of occurrence of SSF in the caffeine trial is significantly different from all other trials, but there were no differences between the two pre-test trials, or the placebo trials. Each fraction denotes the number of trials displaying SSF over the total number of trials recruited during vibration. Caffeine pre-test (CF Pre), 46.5 ± 9.8 %; caffeine post-test (CF Post), 87.0 ± 5.8 %; placebo pre-test (PL Pre), 61.7 ± 10.0 %; placebo post-test (PL Post), 64.6 ± 9.1 %. B, the effect of caffeine on the occurrence of self-sustained firing expressed as a percentage change from the pre-test for each condition. Caffeine caused a significant increase in the occurrence of SSF compared to placebo (*P < 0.05, **P < 0.01).