Fig. 7
Normalized powers in the HF band (R), VHF band (HR1-2-3) and in the 0.5 Hz-wide bands centered on the 1st, 2nd, and 3rd VHF peak harmonics (HR1, HR2 and HR3 respectively). The marginal means estimated by the Repeated-Measures Analysis of Variance model (RM-ANOVA) and their standard errors are represented. For a better understanding, the values are grouped for: a comparing the kind of respirations (Free—F, Paced Normal—PN and Paced Deep—PD); b comparing the normalized powers in the various bands, and the different regions of interest, separately for the various breathing types; c comparing the normalized powers in the various bands, and the breathing types, separately for the various regions of interest. The Bonferroni-corrected p-values of the paired comparisons for the R and HR1-2-3 bands are reported in Table 2; the comparisons among R and the HR bands are reported in Additional file 7: Table S4