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. Author manuscript; available in PMC: 2009 Aug 26.
Published in final edited form as: Eur Respir J. 2008 Feb 6;31(6):1308–1312. doi: 10.1183/09031936.00067607

FIGURE 1.

FIGURE 1

Example of an arousal induced by an increase in CO2. a) General view and b) increased magnification of 30 s during an arousal. EMG: electro-myogram; EEG: electroencephalogram (tracings O2-A1 and C3-A2); CPAP: continuous positive airway pressure; Poes: oesophageal pressure; PET,CO2: end-tidal CO2 tension. .....: PET,CO2 level. #: arousal; ¶: respiratory effort. 1 mmHg=0.133 kPa.