Figure 2. Effect of episodic upper airway negative pressure (UANP) and hypoxia together on upper airway and respiratory pump muscle activities in anaesthetized spontaneously breathing rat.
Original record shows genioglossus (GG), hyoglossus (HG), and diaphragm (Dia) muscle responses to UANP alone under baseline conditions, on the first (no. 1) and last (no. 8) of eight repeated episodes of UANP and hypoxia stimulation together, and in response to UANP alone at individual time points over the subsequent hour following repeated exposure to UANP and hypoxia. The horizontal line in each muscle recording represents zero activity; amplification settings were similar for all EMG recordings. Pua, upper airway pressure.