Reduced voluntary drive to breathe in asthmatic subjects.

  title={Reduced voluntary drive to breathe in asthmatic subjects.},
  author={Gabrielle M. Allen and David K. McKenzie and Simon C. Gandevia and Steve Bass},
  journal={Respiration physiology},
  volume={93 1},
Maximal voluntary drive to the diaphragm and a non-respiratory muscle group (elbow flexors) was compared in 10 control subjects and 11 asthmatics who were studied when well. The degree of voluntary activation during repeated attempted maximal quasi-static efforts was determined using the twitch interpolation technique in the absence of contractile fatigue under both control conditions and following bronchial challenge with histamine. Diaphragm activation was assessed using bilateral phrenic… CONTINUE READING