Sequential comparisons of relaxation training and biofeedback in the treatment of three kinds of chronic headache or, the machines may be necessary some of the time.
D000328:Adult; D000368:Aged; D001676:Biofeedback, Psychology; D002908:Chronic Disease; D004576:Electromyography; D005260:Female; D006261:Headache / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000628:therapy; D012064:Relaxation Therapy; D014653:Vascular Headaches / Q000628:therapy