Table 1.

Breathing events before and after return to room-air following exposure to a hypoxic challenge

Phase	Number	Pre	Post-HX
Spontaneous pause	Number/min	1.82 ± 0.18	5.22 ± 0.65*
	Duration	0.99 ± 0.12	1.62 ± 0.18*
	Total, sec	1.76 ± 0.27	8.36 ± 1.9*
Post-sigh without apnea	Number/min	0.36 ± 0.04	1.53 ± 0.22*
	Duration	0.68 ± 0.73	0.89 ± 0.12*
	Total, sec	0.25 ± 0.36	1.37 ± 0.24*
Post-sigh - type 1	Number/min	0.25 ± 0.03	1.04 ± 0.18*
	Duration	0.63 ± 0.08	0.69 ± 0.08*
	Total, sec	0.16 ± 0.03	0.72 ± 0.11*
Post-sigh - type 2	Number/min	0.17 ± 0.02	0.83 ± 0.11*
	Duration	0.65 ± 0.09	0.71 ± 0.12*
	Total, sec	0.11 ± 0.02	0.59 ± 0.08*
	Total per min	2.28 ± 0.39	10.97 ± 2.3*
	%Time per min	3.8 ± 0.5	18.3 ± 3.3*
Irregular breathing	Total, sec	2.69 ± 0.32	7.46 ± 0.93*
Sniffing	Total, sec	2.44 ± 0.26	6.23 ± 0.83*
Movement artifacts	Total, sec	1.11 ± 0.21	1.27 ± 0.15
	Total per min	6.24 ± 0.83	14.96 ± 2.33*
	%Time per min	10.4 ± 2.2	24.9 ± 3.8*
	Overall Total, min	8.52 ± 1.12	25.93 ± 4.43
	%Time per min	14.1 ± 2.3	43.2 ± 6.6*
	Rinx, %	13.5 ± 1.8	41.9 ± 5.2*

The data are presented as mean ± SEM. HX, hypoxic gas challenge. There were 16 male C57BL6 mice in the group.

^*P < 0.05, post-HX values versus Pre values.