in order to evaluate the relative contribution of vagal and non-vagal afferences to increasing neural drive to the respiratory muscles in 14 asymptomatic asthmatic patients known to be responsive ( decrease in fev1 greater than 20 % of the control values ) to previous bronchial provocation test ( bpt ) with aerosolized histamine , we evaluated fev1 , breathing pattern and neuromuscular drive , as assessed by mouth occlusion pressure ( po.1 ) , under control conditions , during bpt with progressive doubling doses of inhaled histamine ( h ) and 5 min after inhalation of a bronchodilator agent ( reproterol ) ( b ) .
C0035203
breathing
C0004048
inhalation