1. Respiratory muscle activity and respiratory obstruction after abdominal surgery 
Wu A , Drummond G.B.  
British Journal of Anaesthesia 
Volume 96, Issue 4, Pages (April 2006)
DOI: /bja/ael035
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
An example of nasal flow signals and integrated EMG signals in a representative patient. (a) A single breath with intercostal activity reaching a maximal before scalene activity. (b) A trace with a slower time scale, showing three breaths with abdominal EMG. The first nasal flow trace is partly obstructed.
British Journal of Anaesthesia  , DOI: ( /bja/ael035)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
(a) The relative duration of the respiratory phases in obstructed to clear breaths, during inspiration and expiration. (b) The ratio of peak activity during obstructed and clear breaths for the three muscle groups. Note the log scale used for this ratio.
British Journal of Anaesthesia  , DOI: ( /bja/ael035)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions