Fig. 4
A Effects of different ambient temperatures (23, 18, and 15 °C) on baroreflex sensitivity indices of 24-h recordings without sleep scoring (Mix) and with distinctions among active waking (AW), quiet sleep (QS), and paradoxical sleep (PS) in rats. *p < 0.05 vs 23 °C, †p < 0.05 vs 18 °C by Fisher’s least significant difference test following a significant one-way repeated-measures analysis of variance (ANOVA); *p < 0.05 vs 23 °C, †p < 0.05 vs 18 °C by Dunn’s post hoc method following a significant Friedman’s test. B The changes in baroreflex sensitivity indices from 23 to 18 °C (18–23 °C) and from 23 to 15 °C (15–23 °C) during the AW, QS, and PS stages. All variables were normally distributed. *p < 0.05 vs 0 by one-sample t-test; †p < 0.05 vs 18–23 °C by paired t-test; #p < 0.05 vs AW by Fisher’s least significant difference test. Data are shown as scatter/dot plots with means ± SEM; n = 11. BrrA baroreflex sensitivity of ascending mean arterial pressure-R-R interval pairs, BrrD baroreflex sensitivity of descending mean arterial pressure-R-R interval pairs
