Fig. 1.
Impact of hypoxia on phrenic nerve activity. A: moving averaged phrenic nerve activity (∫Phr), breath-by-breath inspiratory burst frequency (breaths/min), arterial blood pressure (ABP, mmHg) and the fraction of inspired oxygen (FiO2). B and C: the mean ∫Phr amplitude (% baseline) (B) and frequency (C) during and following hypoxia. BL indicates baseline, H1–H4 indicates hypoxia minutes 1–4, and PH1–PH4 indicates posthypoxia minutes 1–4. #P < 0.05 vs. all other time points; *P < 0.05 vs. baseline.