Fig. 2From: Intranasal oxytocin reduces provoked symptoms in female patients with posttraumatic stress disorder despite exerting sympathomimetic and positive chronotropic effects in a randomized controlled trialOxytocin serum levels correlate positively with heart rate both before and after social stress exposure. Ten healthy female participants were subjected to the Trier Social stress Test (TSST). Their serum oxytocin levels and heart rate were assessed at baseline (30 min before) and immediately after the TSST challenge. a, b Differences in oxytocin serum levels and heart rate before and after stress induction were calculated with separate one-way ANOVAs. c, d Correlation analyses were performed using Pearson’s correlation coefficient. All data are presented as mean ± standard error of the mean. * p ≤ 0.05; *** p ≤ 0.001. For further statistical details, see main textBack to article page