title: Absolute and proportional resting EMG levels in chronic headache patients in relation to the state of headache.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D004576:Electromyography; D005152:Facial Muscles / Q000503:physiopathology*; D005260:Female; D006261:Headache / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000503:physiopathology