Table 1.

Respiratory parameters across ventilatory behaviors during awake and anesthetized conditions

		Condition
Behavior	Respiratory Parameters	Awake	Anesthetized
Eupnea	Respiratory rate, min−1	111 ± 13	71 ± 6*
	Burst duration, ms	404 ± 43	362 ± 34
	Duty cycle, %	74 ± 9	43 ± 5*
Hypoxia-hypercapnia	Respiratory rate, min−1	158 ± 8†	94 ± 6*†
	Burst duration, ms	271 ± 27†	346 ± 24
	Duty cycle, %	69 ± 4	54 ± 5
	Frequency of sighs, min−1	0.9 ± 0.1	0.6 ± 0.1*

Data are presented as means ± SE. Duty cycle was calculated as % of total time corresponding to inspiration. Main effects of condition were present for respiratory rate and duty cycle (P ≤ 0.001). Main effects of behavior were present for respiratory rate and burst duration (P ≤ 0.006). See text for details. Post hoc comparisons are shown:

^*different from awake during same behavior (P < 0.05);

^†different from eupnea during same condition (P < 0.05).