Figure 6

Heart rate and heart rate variance parameters during stages of the testing session. a) Heart rate and heart rate variance parameters during: resting eyes open (REO), continuous performance task (CPT), go/no-go task (GNG), and cued target detection task (CTD). *Heart rate during REO was lower than during CPT, GNG, and CTD tasks (p < 0.0125, n = 46, mean ± SEM). ^#Heart rate during GNG was higher than during the CTD task (p < 0.0125, n = 46, mean ± SEM), b) *The high frequency range during REO was greater than during the GNG task (p < 0.0125, n = 46, mean ± SEM). c) No differences were found in the low frequency range. d) No differences were found in the low frequency/high frequency ratio of heart rate variance parameters.