. Author manuscript; available in PMC: 2009 Jan 1.

Published in final edited form as: Respir Physiol Neurobiol. 2007 Aug 25;160(1):65–75. doi: 10.1016/j.resp.2007.08.007

Table 2.

Group data for ventilation, upper airway mechanics and EMG during control, hypoxia and recovery periods.

Variables	Control	Hypoxia	R₅	R₁₀	R₂₀
T_I, sec	1.7±0.1	1.6±0.1	1.7±0.1	1.6±0.1	1.6±0.1

T_E, sec	2.1±0.1	2.1±0.1	2.2±0.1	2.1±0.1	2.2±0.1

fr, breath/min	16.4±0.9	16.6±0.8	16.1±0.8	16.4±0.9	16.5±0.6

Petco₂ (mmHg)	40.3±0.9	38.9±1.0	40.7±1.0	40.8±1.2	40.1±1.0

V̇_I, L/min	6.8±0.6	8.5±0.7^**	6.7±0.5	6.9±0.6	7.0±0.6

V_T, L	0.42±0.31	0.51±0.32^**	0.44±0.33	0.47±0.45	0.45±0.37

R_UA, cmH₂O/L/sec	5.8±1.0	4.9±0.7	5.9±0.8	5.5±1.1	6.3±0.9

P_SG cmH₂O	−2.6±0.3	−3.0±0.4	−2.5±0.4	−2.6±0.4	−2.8±0.4

V̇_peakflow, L/sec	0.32±0.03	0.40±0.03^**	0.32±0.02	0.31±0.03	0.33±0.03

EMG_GG, % control	-	202.7±24.1^*	198.9±30.9^*	203.6±29.9^*	205.4±26.4^*

Values are mean±SEM

p<0.01 recovery, hypoxia vs control period.

^**

p<0.05 hypoxia vs control, T_I:inspiratory time, T_E:expiratory time, fr:respiratory rate, Petco₂:end-tidal CO₂ level, V̇_I:minute ventilation, V_T:tidal volume, R_UA:upper airway resistance, P_SG:nadir supraglottic pressure, V̇_peakflow:peak flow, EMG_GG:phasic EMG_GG; R₅ R₁₀ R₂₀ recovery at 5, 10 and 20 minutes after hypoxia, respectively. EMG_GG is expressed as percent of the control values.