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Chest, Vol 72, 154-158, Copyright © 1977 by American College of Chest Physicians

ARTICLES

Conscious perception of bronchospasm as a protective phenomenon in asthma

AR Rubinfeld and MC Pain

Ten initially asymptomatic asthmatic subjects underwent methacholine- induced attacks of asthma on a number of occasions, to the point when tightness in the chest was just sensed (threshold point). As baseline lung volumes increased and the caliber of the airways decreased, the relative changes needed to attain a threshold point generally became smaller. Although pulmonary function can deteriorate chronically without increasing dyspnea, it is possible that a mechanism exists at the level of consciousness to protect a subject's breathing at times when pulmonary function is acutely impaired.


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Copyright © 1977 by the American College of Chest Physicians.