Figure 3. Time between the beginning of tachypnea and the first apneic pause during severe hypoxic challenge.

A) Normal and mdx mice were exposed from normoxia to severe hypoxia (FiO₂ 8%) and the time (seconds) between the hypoxia-induced tachypnea response (arrows) and apneic pause (arrow heads) was calculated. Each animal was challenged twice. B) Quantification of the time to first apneic pause. Mean ± SEM; * p<0.05, n = 14.