using a magnitude production procedure involving forearm isometric contractions , it was found that the ability to discriminate muscle tension varied across headache groups , with the no-headache control group ( r = .76 ) being most accurate , followed by the tension group ( r = .68 ) , the mixed tension and migraine group ( r = .60 ) , and finally the migraine group ( r = .51 ) .
C0018681
headache
C0149931
migraine