HRV and E-field magnitude
A significant association was found between both measures of HRV (RMSSD
and HF-HRV) and the E-field magnitude in all brain regions of interest,
showing that stronger E-field are able to induce greater HRV changes
(Table 1 and Figures 3 and 4).
Table 1. Mixed effects model outcomes showing the association between
E-field strength in the brain regions of interest and HRV modulation.