title: Frontalis EMG response to stress in subjects with frequent muscle-contraction headaches.
mesh_terms: D000328:Adult; D004576:Electromyography; D005260:Female; D006261:Headache / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D009132:Muscles / Q000503:physiopathology*; D013315:Stress, Psychological