Figure 2
Motor evoked potentials (MEPs) in the erector spinae (ES) muscle. (A) MEP traces recorded from the ES muscle of a representative participant. Traces show the average of 10 MEPs in the ES muscle before (grey graces) and after (black traces) 30 min of unilateral arm cycling. (B) Group data (n = 15) showing ES MEPs after the arm cycling. The abscissa shows the time points measured after cessation of the arm cycling and the ordinate shows the size of ES MEP (as a % of the ES MEP obtained prior to the arm cycling, called baseline). The horizontal dashed line represents the size of the ES MEP at baseline. Note that the size of ES MEP increases at 10 and 20 min after the arm cycling compared with baseline and returns to the same as baseline at 30 min after the arm cycling. (C) Individual data showing that majority of participants demonstrate increases in ES MEP at 10 and 20 min after cessation of the arm cycling. Error bars indicate the standard error of the mean (SEM). *p < 0.05, comparison between post-exercise and baseline.
