Suggestion and relaxation in asthmatics

Divided asthmatic Ss into those with allergic basis to their symptoms and those without. 10 extrinsic (EX) and 10 intrinsic (IN) asthmatics were studied using changes in vital capacity and forced expiratory volume (FEV) in the 1st second as the dependent variables. Contraindications applicable to the use of methacholine (Mecholyl) were observed. Relaxation training was given to 5 EX's and 5 IN's, the remaining serving as controls. As predicted, IN's reacted more than EX's to suggestion in the absence of Mecholyl. Both groups reacted less to Mecholyl when told that it was a neutral solution, thus demonstrating cognitive mediation of the breathing response. For Ex's, Mecholyl was a necessary and sufficient stimulus, whereas for IN's Mecholyl was not necessary, suggestion being sufficient. Relaxation training improved respiratory efficiency on a short-term basis, and also the patients' tolerance for Mecholyl. There were indications that IN's benefitted more than EX's from relaxation training.