/Results of the linear mixed effects model for 12 participants in a supine two-minute baseline confirmed a positive relationship between the delta of the ACC's PEP with the ICG's PEP (β = 0.216, SE = 0.059, p < 0.001). In the Bayesian delta regression of the same baseline period, the mean of the hierarchical posterior distribution of subjects' beta values was 0.079 with a 94% HDI of [-0.016, 0.182], indicating a marginally positive relationship between the ACC and ICG recorded PEP perturbations (Figure 5).